Engineering Failure Analysis最新文献_第3页

Experimental and numerical investigation on stress corrosion behavior of defective 2195-T8 Al-Li alloys in acid solutions 缺陷2195-T8铝锂合金在酸性溶液中应力腐蚀行为的实验与数值研究

IF 4.4 2区工程技术

Engineering Failure Analysis Pub Date : 2025-07-23 DOI: 10.1016/j.engfailanal.2025.109922

Gan Tian , Dejun Liu , Xinzhi Yang , Mengqing Liu , Biyun Ren , Zihan Yang

{"title":"Experimental and numerical investigation on stress corrosion behavior of defective 2195-T8 Al-Li alloys in acid solutions","authors":"Gan Tian , Dejun Liu , Xinzhi Yang , Mengqing Liu , Biyun Ren , Zihan Yang","doi":"10.1016/j.engfailanal.2025.109922","DOIUrl":"10.1016/j.engfailanal.2025.109922","url":null,"abstract":"<div><div>Aluminum-lithium (Al-Li) alloy exhibits low-density coupled with high-strength demonstrating potential applications in liquid missile rocket storage tanks. The compatibility between Al-Li alloy and propellants is a critical factor in ensuring the structural integrity and safety of liquid storage tanks under prolonged storage conditions. The study aims to investigate the effects of stress corrosion on defective Al-Li alloys under accelerated propellant corrosion conditions. The stress corrosion tests were carried out on defective Al-Li alloy samples with exposure durations of 6, 12, and 18 h. Scanning electron microscopy (SEM), transmission electron microscopy (TEM), and laser scanning microscopy (LSM) were employed to characterize corrosion features and correlate them with the governing stress corrosion mechanisms. Finite element method (FEM) combined with stress-displacement analysis was used to simulate the pit growth based on mechanical-chemical mechanism. In a comparison of the corrosion features in sample testing for different hours, experimental and numerical results showed that stress plays different roles in the corrosion behavior of defects, leading to corrosion degree difference inside the defects and the bottom of the defect is corroded less severe compared to the adjacent area due to the variability in the competitiveness of different regions within the defect for aggressive ions. The corrosion can decrease the cracking strength of Al-Li alloys and stress further exacerbates the corrosion damage to evolve into cracks.</div></div>","PeriodicalId":11677,"journal":{"name":"Engineering Failure Analysis","volume":"181 ","pages":"Article 109922"},"PeriodicalIF":4.4,"publicationDate":"2025-07-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144711841","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Study on the effect of welding residual stress on hydrogen diffusion behavior in cracked pipeline girth welds 焊接残余应力对裂纹管道环焊缝氢扩散行为影响的研究

IF 5.7 2区工程技术

Engineering Failure Analysis Pub Date : 2025-07-23 DOI: 10.1016/j.engfailanal.2025.109923

Yu Wang , Zikang Liu , Qiankun Zhao , Hailun Zhang , Ying Zhen , Guiyi Wu , Yuguang Cao

{"title":"Study on the effect of welding residual stress on hydrogen diffusion behavior in cracked pipeline girth welds","authors":"Yu Wang , Zikang Liu , Qiankun Zhao , Hailun Zhang , Ying Zhen , Guiyi Wu , Yuguang Cao","doi":"10.1016/j.engfailanal.2025.109923","DOIUrl":"10.1016/j.engfailanal.2025.109923","url":null,"abstract":"<div><div>Hydrogen-blended pipeline transportation is an effective approach to transport hydrogen produced from renewable energy. However, hydrogen permeation may induce hydrogen embrittlement in pipelines, particularly in stress-concentrated regions of girth welds, where hydrogen enrichment is more likely to cause pipeline failure. However, characterizing hydrogen diffusion in cracked girth welds under welding residual stress (WRS) remains challenging. Based on gaseous hydrogen permeation experiments, this paper establishes a finite element model for hydrogen diffusion in cracked girth welds, considering the effects of WRS. This model uses WRS simulation results validated by full-scale pipeline welding experiments, transfers the residual stress field using submodeling techniques, and combines hydrogen diffusion parameters from different regions to calculate the evolution of hydrogen concentration under the coupled effect of stress and cracks. Using this model, the study systematically evaluates how crack morphological parameters (type, size, location, and orientation) affect the maximum hydrogen concentration in girth welds under WRS. The results indicate that crack defects cause localized stress concentration, increasing the maximum hydrogen concentration in the weld region by 9.3 times compared with the case without crack defects. Hydrogen enrichment at the crack tip increases with crack depth and length but decreases with larger crack angles and greater distances from the weld center. Additionally, surface cracks are more likely to induce hydrogen accumulation than embedded cracks. This study accurately characterizes the hydrogen concentration distribution in cracked pipeline girth welds, providing a basis for assessing the safety of hydrogen-blended pipelines.</div></div>","PeriodicalId":11677,"journal":{"name":"Engineering Failure Analysis","volume":"181 ","pages":"Article 109923"},"PeriodicalIF":5.7,"publicationDate":"2025-07-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144721491","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Recent trends and prospects in utilizing ultrasonic-based surface treatment technologies to mitigate hydrogen embrittlement in metals 利用超声表面处理技术减轻金属氢脆的最新趋势和前景

IF 4.4 2区工程技术

Engineering Failure Analysis Pub Date : 2025-07-23 DOI: 10.1016/j.engfailanal.2025.109924

Shu Huang , Emmanuel Agyenim-Boateng , Jie Sheng , Chaojun Zhao , Qinqing Sha , Zhipeng Tan , Yufei Hou , Fengze Dai , Mingliang Zhu , Jianzhong Zhou

{"title":"Recent trends and prospects in utilizing ultrasonic-based surface treatment technologies to mitigate hydrogen embrittlement in metals","authors":"Shu Huang , Emmanuel Agyenim-Boateng , Jie Sheng , Chaojun Zhao , Qinqing Sha , Zhipeng Tan , Yufei Hou , Fengze Dai , Mingliang Zhu , Jianzhong Zhou","doi":"10.1016/j.engfailanal.2025.109924","DOIUrl":"10.1016/j.engfailanal.2025.109924","url":null,"abstract":"<div><div>Metallic materials with excellent qualities face substantial challenges when employed in hydrogen-rich service-life environments, arising from their vulnerability to hydrogen-induced damage, a phenomenon termed hydrogen embrittlement (HE). This has hampered the utilization of such high-performing materials in industrial applications such as hydrogen energy storage and transportation systems, oil and gas, aerospace, as well as automotive systems. In this review, we explore the HE mitigating effects in materials treated with the three key procedures of ultrasonic-based surface treatment technologies (UBSTT), namely: ultrasonic surface rolling process (USRP), ultrasonic nanocrystal surface modification (UNSM), and ultrasonic peening treatment (UPT). By discussing the various methodologies and mechanisms of action, experimental findings, as well as prospective directions for further investigations, this paper aims to provide a comprehensive understanding of how UBSTT enhances the resilience of materials to mitigate them against HE-driven degradation. This paper can serve as a reference for researchers in the area of HE mitigation research.</div></div>","PeriodicalId":11677,"journal":{"name":"Engineering Failure Analysis","volume":"181 ","pages":"Article 109924"},"PeriodicalIF":4.4,"publicationDate":"2025-07-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144711842","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Inhibition of hydrogen damage behavior of TRIP-assisted duplex stainless steel by austenite 奥氏体对trip辅助双相不锈钢氢损伤行为的抑制

IF 5.7 2区工程技术

Engineering Failure Analysis Pub Date : 2025-07-21 DOI: 10.1016/j.engfailanal.2025.109920

Zhilei LIU , Xiaoting LI , Xiaolong LI , Shengjie LIU , Lei CHEN , Miao JIN , Xiaocong MA , Xingzhou CAI

{"title":"Inhibition of hydrogen damage behavior of TRIP-assisted duplex stainless steel by austenite","authors":"Zhilei LIU , Xiaoting LI , Xiaolong LI , Shengjie LIU , Lei CHEN , Miao JIN , Xiaocong MA , Xingzhou CAI","doi":"10.1016/j.engfailanal.2025.109920","DOIUrl":"10.1016/j.engfailanal.2025.109920","url":null,"abstract":"<div><div>In this study, the effect of austenite content on the HE sensitivity of the transformation induced plasticity assisted duplex stainless steel (TRIP-DSS) is examined by means of electrochemical hydrogenation of a 3 wt% NaCl solution for 24 h and a quasi-static tensile test with the rate range of 10<sup>-3</sup>s<sup>−1</sup>. The microstructural mechanisms of the experimental steel in different states were investigated using microstructural characterization techniques such as SEM, EBSD, and TEM, and the underlying mechanisms were discussed. The results show that both IA1000 and IA1200 exhibit the typical three-stage hardening behavior of TRIP-DSS. However, the ultimate tensile strength of IA1000 and IA1200 after hydrogen charging decreased by 16 % and 14 %. The total elongation of IA1000 and IA1200 after hydrogen charging decreased by 8.7 % and 19 %. And the maximum content of strain-induced martensitic transformation (SIMT) of IA1000 and IA1200 after hydrogen charging decreased by 16 % and 11 %. As the amount of austenitic content decreases from 58 wt% to 33 wt%, the hydrogen embrittlement susceptibility index (HEI) rises, and TRIP-DSS’s usual “three-stage” hardening characteristic is greatly diminished. Even though H can lower the SIMT content, the usual sequence of γ → ε → αʹ and γ → αʹ is preserved. Cleavage fracture features are visible on the fracture surface of the hydrogen-influenced zone, and austenite is where hydrogen-induced cracks are most common. The initiation and propagation of cracks are closely related to SIMT. Increasing the amount of austenitic content is thought to be the primary cause of the decay in HE susceptibility, because it increases the area of the hydrogen-influenced zone while reducing the number of hydrogen-induced cracks.</div></div>","PeriodicalId":11677,"journal":{"name":"Engineering Failure Analysis","volume":"181 ","pages":"Article 109920"},"PeriodicalIF":5.7,"publicationDate":"2025-07-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144720789","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Failure analysis of mantle/head liner of a cone crusher at a diamond mine in botswana 博茨瓦纳某钻石矿圆锥破碎机套头衬板失效分析

IF 4.4 2区工程技术

Engineering Failure Analysis Pub Date : 2025-07-21 DOI: 10.1016/j.engfailanal.2025.109921

E.O. Adefila , R.V.S. Prasad , T.P. Leso , E.O. Olakanmi , K. Setswalo , A. Botes , T. Tlhomelang , M. Mothaedi , T. Sesinyi , N.Y. Ematang , R. Ndeda

{"title":"Failure analysis of mantle/head liner of a cone crusher at a diamond mine in botswana","authors":"E.O. Adefila , R.V.S. Prasad , T.P. Leso , E.O. Olakanmi , K. Setswalo , A. Botes , T. Tlhomelang , M. Mothaedi , T. Sesinyi , N.Y. Ematang , R. Ndeda","doi":"10.1016/j.engfailanal.2025.109921","DOIUrl":"10.1016/j.engfailanal.2025.109921","url":null,"abstract":"<div><div>Cone crusher basic operation entails the application of compressive force between a gyrating mantle and a stationary bowl. The mantle and bowl are shielded with manganese steel liners, which wear away during operation and are the most replaced components. The mantle liner (ML) of a diamond mine in Botswana requires replacement at an average of 3600 h of operations, 720 h short of the manufacturer’s 4320 h expectancy. This study analyses ML failure modes and mechanisms while suggesting measures to mitigate this recurring mining operational challenge. This study used a combination of visual inspections, metallurgical investigation, and microstructural studies to provide insight into the failure. The results established abrasive wear, plastic deformation, subsurface cracking, tribocorrosion-induced cracking (TIC), and surface fracture as the ML failure modes. Abrasive wear initiates ML degradation through microcutting, ploughing, microcracking, pitting, and spalling. Impact forces during crushing of kimberlite ore containing hard minerals such as diamond and quartz induces plastic deformation, leading to twinning-induced plasticity (TWIP) and strain accumulation, which promotes the initiation of subsurface cracks along weakened grain boundaries. Cyclic loading promotes the propagation of existing intergranular cracks, which eventually forms surface fracture. Furthermore, corrosion products on the liner’s inner section (Al<sub>2</sub>O<sub>3</sub>, MgO, and CaO) contributed to TIC. This can further interact with subsurface cracks, accelerating failure. The root cause of the ML failure was identified as grain boundary weakening. Measures to mitigate the failure modes include optimisation of the feed distribution system, using corrosion inhibitors during storage, grain boundary-strengthening alloys incorporation, and advanced remanufacturing.</div></div>","PeriodicalId":11677,"journal":{"name":"Engineering Failure Analysis","volume":"181 ","pages":"Article 109921"},"PeriodicalIF":4.4,"publicationDate":"2025-07-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144687016","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Distinct wrinkling behavior of metal-polymer-metal sandwich in the forming process: Total sheet wrinkling and surface wrinkling 金属-聚合物-金属夹层在成形过程中的明显起皱行为：全板起皱和表面起皱

IF 4.4 2区工程技术

Engineering Failure Analysis Pub Date : 2025-07-20 DOI: 10.1016/j.engfailanal.2025.109918

Jaehun Kim , Yeon Taek Choi , Rae Eon Kim , Gang Hee Gu , Jihye Kwon , Jung Gi Kim , Min Hong Seo , Hyoung Seop Kim

{"title":"Distinct wrinkling behavior of metal-polymer-metal sandwich in the forming process: Total sheet wrinkling and surface wrinkling","authors":"Jaehun Kim , Yeon Taek Choi , Rae Eon Kim , Gang Hee Gu , Jihye Kwon , Jung Gi Kim , Min Hong Seo , Hyoung Seop Kim","doi":"10.1016/j.engfailanal.2025.109918","DOIUrl":"10.1016/j.engfailanal.2025.109918","url":null,"abstract":"<div><div>The tunable material properties of metal-polymer-metal (MPM) laminates have garnered significant attention in aeronautical, automotive, and marine industries due to their high specific strength and superior flexural stiffness. Despite these advantages, unavoidable wrinkling during the forming process restricts their broader application in industrial manufacturing. In this study, the wrinkling behavior of MPM laminates in the deep drawing process was investigated through theoretical analysis, experimental observation, and finite element analysis (FEA). Two distinct wrinkling behaviors were identified along the predicted wrinkling line based on the energy method. Beyond the wrinkling line, surface wrinkling occurred even under a high blank holding force (BHF), indicating the susceptibility of MPM laminates to wrinkling. In the case of surface wrinkling, the strain energy decreased due to the shifting of the neutral axis and the potential energy of BHF significantly decreased with deformed thickness. This phenomenon was attributed to the lower elastic modulus of the soft core and buckling-induced delamination, leading to a reduction in the energy required for wrinkling. The effect of soft-core elastic modulus was further evaluated through post-buckling analysis, including modal analysis via FEA. A stiffer core was expected to stabilize the mode shape of the sheet and prevent wrinkling without altering the overall properties of the laminate. This study highlights surface wrinkling as a critical deformation mode in layered systems and proposes material design strategies to enhance the formability of MPM laminates.</div></div>","PeriodicalId":11677,"journal":{"name":"Engineering Failure Analysis","volume":"181 ","pages":"Article 109918"},"PeriodicalIF":4.4,"publicationDate":"2025-07-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144703035","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Experimental study on dynamic performance and wear law of fixed frog sections on heavy-haul lines 重载线路固蛙段动力性能及磨损规律试验研究

IF 4.4 2区工程技术

Engineering Failure Analysis Pub Date : 2025-07-20 DOI: 10.1016/j.engfailanal.2025.109919

Junrui Zhang , Wengang Fan , Daolin Si , Jiang Li , Dongyu Zhao

{"title":"Experimental study on dynamic performance and wear law of fixed frog sections on heavy-haul lines","authors":"Junrui Zhang , Wengang Fan , Daolin Si , Jiang Li , Dongyu Zhao","doi":"10.1016/j.engfailanal.2025.109919","DOIUrl":"10.1016/j.engfailanal.2025.109919","url":null,"abstract":"<div><div>This study presents a comprehensive investigation into the dynamic performance and wear characteristics of heavy-haul trains negotiating fixed frog sections. Utilizing a No.12 fixed frog as the research subject, the experimental design incorporated four distinct axle loads and two operational directions to evaluate full-scale vehicle dynamics. The research methodology involved two primary phases: initial assessment of vertical and lateral forces on unworn fixed frogs, followed by derailment coefficient and wheel load reduction rate calculations to analyze dynamic behavior under varying operational conditions. Subsequently, vertical force measurements were conducted across five progressive wear stages to establish correlations between wheel-frog interaction forces and wear progression. The experimental results reveal that maximum vertical and lateral forces on unworn fixed frogs consistently occur at the nose rail position, 0.75–1.25 m from the theoretical point. Notably, the peak vertical force exceeds 150 % of the static load, identifying this location as a critical stress concentration zone. Wear progression analysis demonstrates a non-linear relationship between vertical force and wear depth, characterized by initial rapid increase, subsequent slight decrease, and final accelerated growth. Critical wear thresholds were identified at 4 mm (initiation of stable wear) and 7 mm (transition to severe wear). Based on vertical force analysis, recommended wear limits for double-track railways are proposed: 8 mm for facing direction operations and 10 mm for trailing direction operations. These findings provide significant insights for mitigating fatigue damage and optimizing maintenance strategies for fixed frog sections in heavy-haul railway systems, ultimately contributing to enhanced operational safety and extended service life.</div></div>","PeriodicalId":11677,"journal":{"name":"Engineering Failure Analysis","volume":"181 ","pages":"Article 109919"},"PeriodicalIF":4.4,"publicationDate":"2025-07-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144694978","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Research on the fracture toughness of pipeline steel X80 in a hydrogen environment 管道钢X80在氢环境中的断裂韧性研究

IF 4.4 2区工程技术

Engineering Failure Analysis Pub Date : 2025-07-19 DOI: 10.1016/j.engfailanal.2025.109917

Haotian Wei , Hai Tang , Baihui Xing , Juan Shang , Sunyang Qiu , Zhengli Hua , Chaohua Gu

{"title":"Research on the fracture toughness of pipeline steel X80 in a hydrogen environment","authors":"Haotian Wei , Hai Tang , Baihui Xing , Juan Shang , Sunyang Qiu , Zhengli Hua , Chaohua Gu","doi":"10.1016/j.engfailanal.2025.109917","DOIUrl":"10.1016/j.engfailanal.2025.109917","url":null,"abstract":"<div><div>Hydrogen pipelines offer an efficient transportation method, but they pose significant safety challenges due to hydrogen embrittlement. The effect of hydrogen pressure on the fracture toughness of pipelines requires further investigation. This study examines the fracture toughness of pipeline steel exposed to high-purity hydrogen gas at various pressures. The experimental results indicate that the fracture toughness decreases progressively with increasing hydrogen pressure, following a trend resembling logarithmic or power-law behavior. Microscopic analysis reveals a shift in the fracture mode from ductile dimple-dominated failure to brittle fracture as the pressure increases from 0 to 12 MPa. Two empirical relationships are evaluated: the theoretically derived Kim model and its X80 calibrated version. The calibration of the Kim model has reduced the relative error of the model for X80 fracture toughness under varying hydrogen pressure conditions. Additionally, an empirical relationship that provides a lower bound of fracture toughness based on the measurements in this study has been developed. And the model is shown to also bound the data in the literature for X80 in gaseous hydrogen at pressure up to 12 MPa at room temperature. These findings provide valuable insights into assessing the structural integrity of hydrogen pipelines.</div></div>","PeriodicalId":11677,"journal":{"name":"Engineering Failure Analysis","volume":"180 ","pages":"Article 109917"},"PeriodicalIF":4.4,"publicationDate":"2025-07-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144679510","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Corrosion fatigue characteristics of 2195-T8 Al-Li alloys in an equivalent corrosive environment of propellant 2195-T8铝锂合金在推进剂等效腐蚀环境中的腐蚀疲劳特性

IF 4.4 2区工程技术

Engineering Failure Analysis Pub Date : 2025-07-19 DOI: 10.1016/j.engfailanal.2025.109916

Biyun Ren, Gan Tian, Dejun Liu, Xinzhi Yang, Mengqing Liu, Yan Zhang

{"title":"Corrosion fatigue characteristics of 2195-T8 Al-Li alloys in an equivalent corrosive environment of propellant","authors":"Biyun Ren, Gan Tian, Dejun Liu, Xinzhi Yang, Mengqing Liu, Yan Zhang","doi":"10.1016/j.engfailanal.2025.109916","DOIUrl":"10.1016/j.engfailanal.2025.109916","url":null,"abstract":"<div><div>To investigate the corrosion-fatigue coupled fracture of Al-Li alloys used in liquid missile propellant tanks within an equivalent liquid propellant environment, and to analyze the compatibility challenges between Al-Li alloys and liquid propellants under wet, long-term storage conditions, this study focused on 2195-T8 Al-Li alloys, a new material for liquid strategic missile tanks. First, 30% HNO<sub>3</sub> was identified as the equivalent propellant environment, exhibiting the fastest corrosion rate and strongest corrosivity, through electrochemical tests. Then, the surface morphologies of corrosion-fatigue specimens under different stress amplitudes were comparatively analyzed. Special attention was paid to the multi-source initiation and discontinuous propagation behavior of secondary cracks and main cracks on the surface of the corrosion-fatigue specimens. The research results have significant theoretical and practical implications for advancing the understanding of Al-Li alloys damage mechanisms and integrity evaluation, and it can guide the long-term storage safety of liquid missile propellant tanks.</div></div>","PeriodicalId":11677,"journal":{"name":"Engineering Failure Analysis","volume":"180 ","pages":"Article 109916"},"PeriodicalIF":4.4,"publicationDate":"2025-07-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144679509","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Experimental and numerical study on impact resistance of external prestressed reinforced concrete beams 外预应力钢筋混凝土梁抗冲击性能试验与数值研究

IF 4.4 2区工程技术

Engineering Failure Analysis Pub Date : 2025-07-18 DOI: 10.1016/j.engfailanal.2025.109914

Jiansheng Wang, Bin Feng, Li Chen

{"title":"Experimental and numerical study on impact resistance of external prestressed reinforced concrete beams","authors":"Jiansheng Wang, Bin Feng, Li Chen","doi":"10.1016/j.engfailanal.2025.109914","DOIUrl":"10.1016/j.engfailanal.2025.109914","url":null,"abstract":"<div><div>Externally prestressed reinforced concrete (RC) beams demonstrate considerable potential for enhanced structural performance under impact loading. However, a comprehensive understanding of how key factors such as initial prestress, partial prestressing ratio (PPR), and reinforcement ratio influence the failure modes and structural response of these beams under impact loading remains limited. Drop hammer impact tests were performed on externally prestressed concrete beams subjected to varying levels of initial prestress. The influence of initial prestress on the dynamic response and failure modes was assessed through measurements of impact force, support force, and mid-span displacement. The commercial finite element software LS-DYNA was utilized to investigate the effects of key parameters, including initial prestress, partial prestressing ratio, and non-prestressed longitudinal reinforcement ratio, on the impact resistance of externally prestressed beams. Empirical relationships were established via curve fitting based on simulation results. Experimental findings indicate that, under identical impact conditions, higher initial prestress leads to greater peak impact forces and reduced mid-span displacements. As the initial prestress increases, the dominant failure mode shifts from flexural-shear to shear failure. Numerical simulations further demonstrate that mid-span displacement decreases progressively with increases in initial prestress, PPR, or non-prestressed longitudinal reinforcement ratio. Among these, the displacement reduction effect of the non-prestressed longitudinal reinforcement ratio diminishes most rapidly, followed by initial prestress, while the effect of PPR attenuates at the slowest rate.</div></div>","PeriodicalId":11677,"journal":{"name":"Engineering Failure Analysis","volume":"180 ","pages":"Article 109914"},"PeriodicalIF":4.4,"publicationDate":"2025-07-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144679511","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0