Engineering Fracture Mechanics最新文献

Specific very high cycle fatigue fracture mechanism in C17200 beryllium copper alloy caused by grain boundary precipitates and persistent slip bands

IF 4.7 2区工程技术

Engineering Fracture Mechanics Pub Date : 2025-04-11 DOI: 10.1016/j.engfracmech.2025.111113

Hongchang Ma , Zhinian Li , Junhuan Wang , Wei Hua , Guoqiang Gao , Hongqian Xue

{"title":"Specific very high cycle fatigue fracture mechanism in C17200 beryllium copper alloy caused by grain boundary precipitates and persistent slip bands","authors":"Hongchang Ma , Zhinian Li , Junhuan Wang , Wei Hua , Guoqiang Gao , Hongqian Xue","doi":"10.1016/j.engfracmech.2025.111113","DOIUrl":"10.1016/j.engfracmech.2025.111113","url":null,"abstract":"<div><div>The damage behavior of C17200 beryllium copper alloy during very high cycle fatigue (VHCF) at a loading frequency of 20 kHz was investigated. Samples subjected to varying loading were characterized and evaluated to clarify the impact of internal microstructure on VHCF performance. The findings demonstrate that grain boundary precipitates (GBPs) significantly influence the VHCF fracture behavior of the C17200 alloy. GBPs facilitate a change in fracture mode from the crack initiation phase to the crack propagation phase. The interaction between GBPs-persistent slip bands (PSBs) created a distinctive phenomenon in the crack initiation phase, wherein cracks originate from the GBPs and propagate along the PSBs. Furthermore, it was verified that areas with a high density of precipitates lead to their detachment. This study introduces the inaugural examination of the VHCF performance and fracture process of C17200 alloy. A novel fatigue life prediction model, which integrates the impact of precipitates as a critical factor, was established, demonstrating strong concordance with experimental results.</div></div>","PeriodicalId":11576,"journal":{"name":"Engineering Fracture Mechanics","volume":"321 ","pages":"Article 111113"},"PeriodicalIF":4.7,"publicationDate":"2025-04-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143825924","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

Intergranular crack arrest in FCC metals with distinct stacking fault energy

IF 4.7 2区工程技术

Engineering Fracture Mechanics Pub Date : 2025-04-11 DOI: 10.1016/j.engfracmech.2025.111109

Leilei Hao , Xujia Hou , Jun Chen , Hui Niu , Dongping Chen , Aiguo Pi

{"title":"Intergranular crack arrest in FCC metals with distinct stacking fault energy","authors":"Leilei Hao , Xujia Hou , Jun Chen , Hui Niu , Dongping Chen , Aiguo Pi","doi":"10.1016/j.engfracmech.2025.111109","DOIUrl":"10.1016/j.engfracmech.2025.111109","url":null,"abstract":"<div><div>The influence of stacking fault energy (SFE) on the microstructure and mechanical properties of materials is a well-established topic, however, its universality in metal crystals remains unchallenged. In this work, molecular dynamics simulations are employed to explore intergranular crack propagation in metals with distinct SFEs, i.e., Al, Ni, Cu, and Ag, as bicrystals, tricrystals, and polycrystals. It is found that the crack arrest capability does not follow the indication from SFEs in both bicrystal and tricrystal cases. The key mechanism behind the enhanced crack arrest capability arises from dislocation hardening in bicrystals, leading to an increase in the J-integral. Besides dislocation hardening, the dislocation motion also makes a great contribution to improving the crack arrest capability in tricrystals, also increasing the J-integral. In contrast, polycrystals follow the guidance of SFE as expected, and the governing mechanism lies in the density of planar defects, as lower SFE promotes ductility. Our findings challenge the broadly accepted notion that reducing SFE universally enhances crack arrest capability. This study provides valuable insights into the mechanisms of intergranular crack propagation and arrest in metals with distinct SFEs, offering guidance for the design of advanced materials with superior mechanical performance.</div></div>","PeriodicalId":11576,"journal":{"name":"Engineering Fracture Mechanics","volume":"321 ","pages":"Article 111109"},"PeriodicalIF":4.7,"publicationDate":"2025-04-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143823673","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

A method for determining crack tip location during the tuff crack propagation based on ultra-fast time resolution method and immune algorithm

IF 4.7 2区工程技术

Engineering Fracture Mechanics Pub Date : 2025-04-09 DOI: 10.1016/j.engfracmech.2025.111129

Mingyuan Zhang , Muao Shen , Dejian Li , Manchao He , Yingjun Li

{"title":"A method for determining crack tip location during the tuff crack propagation based on ultra-fast time resolution method and immune algorithm","authors":"Mingyuan Zhang , Muao Shen , Dejian Li , Manchao He , Yingjun Li","doi":"10.1016/j.engfracmech.2025.111129","DOIUrl":"10.1016/j.engfracmech.2025.111129","url":null,"abstract":"<div><div>Rock is a typical brittle material, and the crack propagation rate of rock is approximately 300–700 m/s, and some even reach over 1000 m/s. This brought many challenges for accurately determining the crack tip location during the rock crack propagation by traditional high-speed photography. Because the crack propagated continuously within the shooting interval of high-speed photography, systematic errors emerged in the tracking of the crack − tip location and the determination of the crack propagation rates. Moreover, because the stress intensity factor (SIF) is a singularity parameter, determining the SIF first requires tracking the location of the crack tip in rock mechanics experiments. Thus, a new method combining the ultra-fast time resolution method, immune algorithm and DIC technology was proposed for quantitatively describing the crack propagation behavior of tuff samples. Its time resolution can reach 15 picoseconds. During this time interval, the crack propagation process can be considered frozen. Then continuous tracking of the crack tip location during the fracture process is realized by using the immune algorithm and digital image correlation (DIC) technology. Then, a series of three-point bending tests were conducted, and the fracture trajectory was obtained via this method. In addition, the SIF at the real-time crack tip was determined based on linear elastic fracture mechanics (LEFM) with the Williams stress function. The experimental results showed that the whole-field strain distribution at the picosecond scale can be obtained with this method, and the key mechanical parameters of rock fracture were determined more accurately.</div></div>","PeriodicalId":11576,"journal":{"name":"Engineering Fracture Mechanics","volume":"321 ","pages":"Article 111129"},"PeriodicalIF":4.7,"publicationDate":"2025-04-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143808683","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

Investigation on the propagation characteristics of tensile fractures crossing interfaces within dry hot rock reservoirs based on the Brazilian split test

IF 4.7 2区工程技术

Engineering Fracture Mechanics Pub Date : 2025-04-09 DOI: 10.1016/j.engfracmech.2025.111127

Xianzhong Li, Weilong Zhou, Shigang Hao, Tao Wu, Jinhao Zhang, Yinnan Tian, Bing Liu

{"title":"Investigation on the propagation characteristics of tensile fractures crossing interfaces within dry hot rock reservoirs based on the Brazilian split test","authors":"Xianzhong Li, Weilong Zhou, Shigang Hao, Tao Wu, Jinhao Zhang, Yinnan Tian, Bing Liu","doi":"10.1016/j.engfracmech.2025.111127","DOIUrl":"10.1016/j.engfracmech.2025.111127","url":null,"abstract":"<div><div>An in-depth exploration of the expansion behavior of hydraulic fractures across natural interfaces holds significant engineering importance for enhancing geothermal exploitation of dry hot rock reservoirs. In this research, two types of granite specimens featuring distinct cementation strength characteristics were chosen to investigate the behavior of hydraulic fractures extending across the interface under diverse loading angles. Firstly, X-ray diffraction (XRD) and polarizing microscopy were employed to analyze the mineral composition and distribution disparities at the granite interface and on either side. Subsequently, the Brazilian split test was performed on the two granite specimens with natural interfaces using the acoustic emission (AE) system and digital image correlation (DIC) method at five loading angles. The results demonstrate that the extension behavior of hydraulic fractures in granite is profoundly influenced by the loading angle, the cementation strength of the interface, and the physical property discrepancies between the two sides of the interface. The tensile strength of both granites ascends initially and then descends as the loading angle increases. The mineral composition content and spatial distribution characteristics of the granite interface on both sides determine the physical property differences between the two sides of the interface. The main fracture formed in granite is more prone to shift towards the side of the weaker material, and secondary fractures are more likely to occur in the area of the weaker material. These discoveries are anticipated to furnish theoretical guidance for the development of hydraulic fracturing technology for dry hot rock reservoirs.</div></div>","PeriodicalId":11576,"journal":{"name":"Engineering Fracture Mechanics","volume":"321 ","pages":"Article 111127"},"PeriodicalIF":4.7,"publicationDate":"2025-04-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143808684","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

Strength deterioration mechanism of concrete under dynamic and quasi-static load after being subjected to microwave treatment

IF 4.7 2区工程技术

Engineering Fracture Mechanics Pub Date : 2025-04-07 DOI: 10.1016/j.engfracmech.2025.111116

Wei Wei , Zhenyang Zong , Xingwang Chen , Zhushan Shao , Qian Geng

{"title":"Strength deterioration mechanism of concrete under dynamic and quasi-static load after being subjected to microwave treatment","authors":"Wei Wei , Zhenyang Zong , Xingwang Chen , Zhushan Shao , Qian Geng","doi":"10.1016/j.engfracmech.2025.111116","DOIUrl":"10.1016/j.engfracmech.2025.111116","url":null,"abstract":"<div><div>Microwave is a new technology for concrete damage and aggregate recovery. In this paper, the effects of microwave irradiation conditions and aggregate differences on heating results were investigated. The strength degradation mechanism of concrete under uniaxial compression, splitting tensile and dynamic loads after microwave irradiation were studied. The aggregate separation ratio under different crushing approaches was compared, and the optimization method of aggregate breaking and recycling was proposed subject to different aggregate types. The results indicated that the relative magnitude of the dielectric loss factor of aggregate and mortar influenced the region and extent of damage in concrete, affecting the degree of interface separation. Increased microwave energy input accelerated the degradation of concrete strength. In the impact tests, the elastic modulus of the specimens decreased with increasing microwave irradiation time, the yield strength and dynamic compressive strength decreased, and the plastic plateau increased. Results showed that microwave power significantly affects the degradation of concrete strength while has a smaller impact on improving the separation efficiency of aggregate recycling.</div></div>","PeriodicalId":11576,"journal":{"name":"Engineering Fracture Mechanics","volume":"321 ","pages":"Article 111116"},"PeriodicalIF":4.7,"publicationDate":"2025-04-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143808682","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

A new analytical method for determining J-integral-crack opening displacement curve of DCB specimen with large scale fiber bridging

IF 4.7 2区工程技术

Engineering Fracture Mechanics Pub Date : 2025-04-07 DOI: 10.1016/j.engfracmech.2025.111121

Dingli Tian , Yu Gong , Zhaobin Li , Luohuan Zou , Jianyu Zhang , Libin Zhao , Ning Hu

{"title":"A new analytical method for determining J-integral-crack opening displacement curve of DCB specimen with large scale fiber bridging","authors":"Dingli Tian , Yu Gong , Zhaobin Li , Luohuan Zou , Jianyu Zhang , Libin Zhao , Ning Hu","doi":"10.1016/j.engfracmech.2025.111121","DOIUrl":"10.1016/j.engfracmech.2025.111121","url":null,"abstract":"<div><div>The fiber bridging is an important toughening mechanism, and <em>J</em>-integral theory is usually used to determine the bridging stress. To achieve the determination of bridging stress, the calculation of <em>J</em>-integral-crack opening displacement <em>J</em>(<em>δ</em>) curve is the key. A new analytical method is proposed to calculate the <em>J</em>(<em>δ</em>) curve, which only requires the experimentally recorded load–displacement data. Compared with the traditional analytical method based on equivalent crack length, the proposed method has more physical significance. Two independent parameters, i.e. initial fracture toughness <em>J<sub>init</sub></em> and the crack opening displacement corresponding to initial damage <em>δ</em><sub>0</sub> can be directly extracted from the calculated <em>J</em>(<em>δ</em>) curve. In addition, the bridging stress with a multi-linear function can be determined. Experimental cases with large scale fiber bridging are used to verify the validity of the analytical method. The proposed method is simple and effective, and can provide support for investigating the fiber bridging phenomenon of mode I delamination.</div></div>","PeriodicalId":11576,"journal":{"name":"Engineering Fracture Mechanics","volume":"321 ","pages":"Article 111121"},"PeriodicalIF":4.7,"publicationDate":"2025-04-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143825926","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

Fiber damage mechanisms of SiCf/Ti6242 under fatigue load at elevated temperature

IF 4.7 2区工程技术

Engineering Fracture Mechanics Pub Date : 2025-04-07 DOI: 10.1016/j.engfracmech.2025.111115

Xuming Niu, Jingyuan Hu, Lei Pan, Hanmin Xiao, Xubo Yao, Yingdong Song, Zhigang Sun

引用次数: 0

Mechanisms of transverse bowl-shaped crack in all solid-state batteries

IF 4.7 2区工程技术

Engineering Fracture Mechanics Pub Date : 2025-04-07 DOI: 10.1016/j.engfracmech.2025.111117

Longfei Yang, Yue Gao, Yuli Chen, Bin Ding

{"title":"Mechanisms of transverse bowl-shaped crack in all solid-state batteries","authors":"Longfei Yang, Yue Gao, Yuli Chen, Bin Ding","doi":"10.1016/j.engfracmech.2025.111117","DOIUrl":"10.1016/j.engfracmech.2025.111117","url":null,"abstract":"<div><div>The initiation and growth of Li dendrites pose significant challenges to the commercialization of all-solid-state batteries (ASSBs). Dendrite initiation begins with spallation with subsurface pore filling and subsequent bowl-shaped crack propagation toward the Li anode/solid electrolyte (SE) interface. In this study, we investigate the mechanism of transverse bowl-shaped crack initiation and propagation associated with Li dendrite initiation, as dendrite growth is inevitable once initiated. We propose a mechano-electrochemical coupling theoretical model to analyze the stress field around a subsurface pore during Li filling, treating the continuous Li deposition at the pore/SE interface as eigenstrain. Stress concentration at the pore edge, which drives crack initiation when exceeding the local fracture strength, can be alleviated by applying stack pressure or utilizing an SE with a low pore aspect ratio, a large pore depth, high electronic resistance, and low area-specific resistances at electrode/SE interface. Furthermore, bowl-shaped crack propagation is simulated by extended finite element method (XFEM) following the maximum principal stress criterion. The attraction from Li anode/SE interface drives the crack to deflect into a bowl-shaped morphology, which can be suppressed by applying lateral pressure. These findings elucidate the underlying mechanisms of bowl-shaped crack formation related to Li dendrite initiation and provide critical insights for mitigating dendrite-induced degradation in ASSBs.</div></div>","PeriodicalId":11576,"journal":{"name":"Engineering Fracture Mechanics","volume":"321 ","pages":"Article 111117"},"PeriodicalIF":4.7,"publicationDate":"2025-04-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143823597","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

Assessing fracture toughness performance of adhesively bonded carbon fiber/epoxy composite joints accompanied by acoustic emission inspection: Effect of surface treatment methods

IF 4.7 2区工程技术

Engineering Fracture Mechanics Pub Date : 2025-04-07 DOI: 10.1016/j.engfracmech.2025.111119

Halil Senol , Hasan Ulus , Ceren Yildirim , Abdulrahman Al-Nadhari , Serra Topal , Mehmet Yildiz

{"title":"Assessing fracture toughness performance of adhesively bonded carbon fiber/epoxy composite joints accompanied by acoustic emission inspection: Effect of surface treatment methods","authors":"Halil Senol , Hasan Ulus , Ceren Yildirim , Abdulrahman Al-Nadhari , Serra Topal , Mehmet Yildiz","doi":"10.1016/j.engfracmech.2025.111119","DOIUrl":"10.1016/j.engfracmech.2025.111119","url":null,"abstract":"<div><div>This study investigates the impact of mechanical abrasion (MA), atmospheric pressure plasma activation (APA), and peel-ply (PP) treatments on the fracture toughness, damage mechanisms and damage progression of adhesively bonded carbon-fiber (CF)/epoxy composite joints. The chemical and physical properties of treatment applied adherend surfaces are examined through various methods. Double cantilever beam (DCB) and end-notched flexure (ENF) tests are conducted to evaluate the fracture toughness of joints. The acoustic emission (AE) method is employed during DCB and ENF tests to evaluate damage mechanisms and damage progression within specimens. The results demonstrate that MA treatment provides the highest fracture toughness, with mode-I (G<sub>IC</sub>) and mode-II (G<sub>IIC</sub>) toughness values increasing by 59% and 43%, respectively, compared to untreated specimens. APA-treated specimens show improved G<sub>IC</sub> and G<sub>IIC</sub> values by 27% and 30%, respectively, which is attributed to enhanced surface energy and chemical functionality. PP treatment contributes to a 20% increase in G<sub>IC</sub> and a 14% rise in G<sub>IIC</sub> due to improved surface roughness and surface energy. The findings highlight that the mechanical interlocking effect induced by MA treatment significantly strengthens the bond, while surface chemistry modifications achieved through APA treatment benefit bonding in applications where material integrity is critical. AE analysis reveals distinct damage mechanisms associated with each surface treatment.</div></div>","PeriodicalId":11576,"journal":{"name":"Engineering Fracture Mechanics","volume":"321 ","pages":"Article 111119"},"PeriodicalIF":4.7,"publicationDate":"2025-04-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143825925","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

Geometry-dependent fracture behavior of glassy polymer films: Insights from mode I and mode III tearing of polyimide films

IF 4.7 2区工程技术

Engineering Fracture Mechanics Pub Date : 2025-04-07 DOI: 10.1016/j.engfracmech.2025.111122

Hangyu Fan , Tao Liu , Xin Pan , Jianqiang Deng , Zhaoxin Yun , Xiang Gao , Liming Chen

引用次数: 0