Engineering Failure Analysis最新文献

{"title":"Seismic failure analysis and risk assessment framework for masonry-slab arch bridges considering comprehensive seismic intensity measures","authors":"Si-Qi Li,&nbsp;Wen-Bo Chu","doi":"10.1016/j.engfailanal.2025.110493","DOIUrl":"10.1016/j.engfailanal.2025.110493","url":null,"abstract":"<div><div>Seismic failure and risk assessment strategies for bridges are crucial for evaluating the disaster resistance capability of urban and rural infrastructure. However, methods and strategies applicable to seismic risk and failure estimation of masonry-slab arch bridges (MSABs) are relatively lacking. A single seismic intensity estimation strategy is challenging to use to estimate seismic intensity accurately. To address this critical issue, this study considers multiple seismic intensity measures. A comprehensive strategy for estimating seismic intensity was proposed. By utilizing a comprehensive seismic intensity estimation model and equations, various ground motion parameters were analysed and compared, considering the monitoring records of nine stations with different spatial distributions (1467,246 earthquake accelerations) during the Wenchuan earthquake in China. A novel scale for estimating the fragility of MSABs is proposed by combining the comprehensive seismic intensity estimation method with the updated Chinese seismic intensity standard. The proposed method was used to estimate the fragility grade of 125 MSABs surveyed onsite. A seismic fragility prediction model for MSABs that incorporates logarithmic-linear fitting and optimized nonlinear estimation algorithms has been developed. The comparison results of the logarithmic-linear regression models indicate that the proposed model has high prediction accuracy for the FG1 level, with a goodness-of-fit of 0.762 and relatively low error, and a low prediction accuracy for the FG5 level, with a goodness-of-fit of 0.293. A three-dimensional numerical model of an MSAB was developed via three-dimensional numerical simulation technology. The earthquake failure and damage simulation of MSAB was conducted considering comprehensive seismic intensity measures. Considering the displacement demands, a dynamic time history comparison curve for the MSAB is generated. Incremental dynamic analysis (IDA) considering various innovative engineering demand parameters was performed. According to the Chinese bridge seismic design code and intensity standards, the drift limit of the numerical model is 0.1 m. The threshold values for seismic acceleration (capacity) in zones Ⅵ–XI are 2.0 m/s², 3.5 m/s², 5.0 m/s², 8.0 m/s², 15 m/s², and 30 m/s², respectively. A seismic failure cloud-map model for MSABs considering comprehensive seismic intensity measures was generated. According to the results of the method analysis and numerical simulation verification, the proposed failure and risk model can be effectively used to evaluate the seismic risk and failure modes of MSABs.</div></div>","PeriodicalId":11677,"journal":{"name":"Engineering Failure Analysis","volume":"186 ","pages":"Article 110493"},"PeriodicalIF":5.7,"publicationDate":"2026-03-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145837837","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}

{"title":"Effect of hydrogen content on hydrogen embrittlement behavior and fracture mechanisms of SA508Gr.4N for nuclear reactor pressure vessel","authors":"Xin Dai ,&nbsp;Ruikai Yu ,&nbsp;Qing Dong ,&nbsp;Lijun Wang ,&nbsp;Ran Li ,&nbsp;Yuan Zhang ,&nbsp;Yaqiang Tian ,&nbsp;Liansheng Chen","doi":"10.1016/j.engfailanal.2025.110471","DOIUrl":"10.1016/j.engfailanal.2025.110471","url":null,"abstract":"<div><div>To investigate the effect of hydrogen content on the hydrogen embrittlement behavior of SA508Gr.4 N low-alloy steel for nuclear pressure vessels, this study analyzed the hydrogen desorption behavior in the steel via thermal desorption spectroscopy (TDS). Dynamic hydrogen charging combined with slow strain rate tensile (SSRT) tests were studied to evaluate the variations in mechanical properties and fracture characteristics. Furthermore, the initiation and propagation mechanisms of hydrogen-induced cracks were systematically characterized. The results demonstrated that the hydrogen charging current density had a significant effect on hydrogen desorption behavior: the hydrogen desorption rate and hydrogen content in steel increased with the increase of current density when the current density was below 10 mA/cm², beyond which it declined due to the initiation of hydrogen-induced cracking. Under the dynamic hydrogen charging slow strain rate tensile testing, the elongation exhibited a monotonic decrease from 24.3 % to 7.7 % as the current density increased from 0 mA/cm² to 30 mA/cm², while the hydrogen embrittlement susceptibility coefficient increased monotonically to 68.3 %. The fracture mode transitioned progressively from ductile fracture to intergranular brittle fracture. The presence of hydrogen preferentially drove crack initiation at grain boundaries and then propagated along martensitic laths and grain boundaries. This process weakened interfacial cohesion and reduced propagation energy barriers, thereby accelerating brittle fracture.</div></div>","PeriodicalId":11677,"journal":{"name":"Engineering Failure Analysis","volume":"186 ","pages":"Article 110471"},"PeriodicalIF":5.7,"publicationDate":"2026-03-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145837833","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}

{"title":"Energy-fractal characterization and correlation of fracture behavior in pipeline girth welds","authors":"Xingfeng Liu ,&nbsp;Yongxin Xu ,&nbsp;Ying Zhen ,&nbsp;Jian Chen ,&nbsp;Guiyi Wu ,&nbsp;Yuguang Cao","doi":"10.1016/j.engfailanal.2025.110484","DOIUrl":"10.1016/j.engfailanal.2025.110484","url":null,"abstract":"<div><div>Girth welds constitute critical connecting components in pipeline systems, where their fracture behavior directly determines structural integrity. Conventional single-parameter characterization methods fail to simultaneously capture macroscopic energy absorption and fracture morphology evolution. This study proposes an energy-fractal dual-parameter framework integrating specific fracture energy and three-dimensional fractal dimension to systematically investigate X65 pipeline girth weld fracture behavior under varying stress triaxialities. Notched tensile specimens from base metal, weld metal, and heat-affected zones were tested. Specific fracture energy was quantified from load-displacement curves, while fractal dimensions were calculated from laser-scanned fracture surfaces using box-counting algorithms. Results demonstrate that heat-affected zones exhibit superior toughness under low stress triaxiality, whereas weld metal remains the weakest region across all notch configurations. Fractal dimension decreases monotonically with increasing stress concentration, indicating progressive transition from tortuous to planar crack propagation. A cubic polynomial regression established the quantitative relationship between energy dissipation and surface complexity, revealing the intrinsic coupling mechanism. This paper provides a novel pathway for failure analysis of girth welds and establishes a theoretical basis for energy-based integrity prediction.</div></div>","PeriodicalId":11677,"journal":{"name":"Engineering Failure Analysis","volume":"186 ","pages":"Article 110484"},"PeriodicalIF":5.7,"publicationDate":"2026-03-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145837832","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}

{"title":"Statistical modelling of wire breakage progression and rope fatigue life considering tension history","authors":"Masatoshi Ogata ,&nbsp;Atsushi Yamaguchi ,&nbsp;Naoya Kurahashi ,&nbsp;Kenta Yamagiwa","doi":"10.1016/j.engfailanal.2025.110476","DOIUrl":"10.1016/j.engfailanal.2025.110476","url":null,"abstract":"<div><div>Wire ropes are extensively utilised in mechanical systems such as cranes and elevators, where they are subjected to repeated bending stresses under varying tension levels. This cyclic loading leads to progressive wire breakage and, ultimately, rope failure. To enhance the prediction of rope damage and optimise discard timing, this study proposes a statistical damage model that incorporates tension history. The model quantifies rope damage by evaluating the loss of cross-sectional area resulting from wire breakage. The progression of wire breakage is characterised using a Weibull distribution with tension-dependent parameters. A hierarchical Bayesian framework is employed to robustly estimate the failure probability parameters across different wire types within the rope. The validity of the model was demonstrated through fatigue tests conducted under constant, two-step, and multistep tension conditions. Compared with Miner’s rule, the proposed approach offers superior prediction accuracy for fatigue life and effectively captures the nonlinear progression of wire rope damage. Furthermore, the model accurately predicts rope damage from its initial state to the point of discard. These findings highlight the capability of the proposed method to quantitatively evaluate rope damage under various tension histories, thereby contributing to safer and more effective maintenance strategies.</div></div>","PeriodicalId":11677,"journal":{"name":"Engineering Failure Analysis","volume":"186 ","pages":"Article 110476"},"PeriodicalIF":5.7,"publicationDate":"2026-03-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145788713","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}

{"title":"Experimental study on the mechanical and deformation characteristics and failure mode of vertical combined frame-type retaining structure","authors":"Yan Xu,&nbsp;Yong Hao,&nbsp;Congwen Peng,&nbsp;Yang Tang,&nbsp;Xuan Wang,&nbsp;Zexi Chen","doi":"10.1016/j.engfailanal.2025.110448","DOIUrl":"10.1016/j.engfailanal.2025.110448","url":null,"abstract":"<div><div>For foundation pit projects with complicated surrounds and constrained construction areas, this study suggests a vertically combined frame-type retaining structure (VCFRS) to improve construction efficiency. This retaining structure features a flexible plan layout and easily adjustable structural stiffness. The impacts on retaining structures of variables such as the number of connecting beams (<em>n</em>) and the space between connecting beams (<em>B</em>) were examined through laboratory model tests. The experimental results show that, during excavation, the VCFRS exhibit a “pile-braced” deformation pattern, with the support effect influenced by the number of connecting beams, the position of the second connecting beam, and the excavation depth. Compared with single-row piles, the VCFRS not only alter the distribution pattern of pile bending moments, flattening their profile, but also reduce the peak bending moment of the pile. With increasing excavation depth, the active earth pressure behind the rear pile (RP) transitions from linear to a piece-wise linear pattern, the passive earth pressure in front of the RP decreases, and the passive earth pressure in front of the front pile (FP) increases. The VCFRS demonstrates an overturning failure mode during the testing, and as <em>B</em> increases, the retaining piles’ rotation point progressively moves upward. In the VCFRS design, in addition to considering factors such as <em>n</em> and <em>B</em>, it is recommended to reinforce the soil between the front and rear piles, as well as the joints between connecting beams and retaining piles.</div></div>","PeriodicalId":11677,"journal":{"name":"Engineering Failure Analysis","volume":"186 ","pages":"Article 110448"},"PeriodicalIF":5.7,"publicationDate":"2026-03-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145788843","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}

{"title":"Failure mechanisms and structural response of CIPP-Rehabilitated concrete pipes under external loads","authors":"Jing Liu ,&nbsp;Jingguo Cao ,&nbsp;Chang Ma ,&nbsp;Wenlin Jing ,&nbsp;Kangfu Sun ,&nbsp;Tingting Yang","doi":"10.1016/j.engfailanal.2026.110563","DOIUrl":"10.1016/j.engfailanal.2026.110563","url":null,"abstract":"<div><div>Cured-in-place pipe (CIPP) lining is widely used to restore deteriorated concrete drainage pipes; however, the failure evolution and composite load-bearing behavior of rehabilitated pipelines under external loads remain poorly quantified. This study conducted full-scale three-edge bearing tests (TEBT) on intact, corroded, and rehabilitated reinforced concrete pipes (RCPs) to clarify how corrosion defects and liner stiffness jointly influence structural performance. Artificial corrosion was introduced via controlled high-pressure water milling, and two rehabilitation configurations—5 mm semi-structural and 12 mm structural liners—were applied. Circumferential strain responses and crack development were continuously monitored using strain gauges and distributed optical-fiber sensing. Results show that the 12 mm structural liner increased the cracking and ultimate loads by 10–26 %, redistributed strain, and shifted the failure mode from brittle concrete crushing to a ductile composite response with a secondary yield plateau. In contrast, the 5 mm semi-structural liner decreased the ultimate load by up to 17 % due to circumferential stiffness mismatch combined with interface debonding, which prevented effective composite action. Mechanistic analysis reveals that stiffness superposition and neutral-axis migration jointly govern the enhanced bending resistance and ductility of the rehabilitated system. These findings elucidate the external load failure mechanisms of CIPP-reinforced RCPs and provide performance-based guidance for selecting liner stiffness and designing structural rehabilitation strategies for buried pipelines.</div></div>","PeriodicalId":11677,"journal":{"name":"Engineering Failure Analysis","volume":"186 ","pages":"Article 110563"},"PeriodicalIF":5.7,"publicationDate":"2026-03-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145973371","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}

{"title":"Dynamic evolution and evaluation of ground collapse induced by urban underground pipeline failures","authors":"Cheng Zhao ,&nbsp;Qiang Liu ,&nbsp;Jinquan Xing ,&nbsp;Jialun Niu ,&nbsp;Huiguan Chen ,&nbsp;Bo Dong","doi":"10.1016/j.engfailanal.2025.110460","DOIUrl":"10.1016/j.engfailanal.2025.110460","url":null,"abstract":"<div><div>Urban transportation systems and public safety are increasingly threatened by frequent occurrences of surface subsidence, primarily caused by seepage-induced soil erosion due to pipeline failures. This study developed a model test apparatus capable of controlling both water level and crack width, and conducted a series of model tests to investigate the influence of water level, particle gradation, crack width, and compaction degree on the development of seepage erosion. The spatial and temporal evolution characteristics of seepage erosion around defective pipelines were revealed. Two erosion failure modes were identified: continuous erosion failure mode and cavity-forming erosion failure mode. Based on the temporal evolution patterns of erosion cavities and erosion rates, the development process of seepage erosion can be distinctly divided into three stages: the relaxation stage, the steady erosion stage, and the erosion failure stage. The steady erosion stage, characterized by slow and insidious development, poses the greatest risk in engineering practices. The effects of the four factors at different stages were systematically analyzed: high water levels significantly shortened the relaxation stage due to enhanced seepage force; increased fine sand content reduced the duration of the steady erosion stage, accelerating erosion onset; an increase in crack width accelerated the development of erosion and led to an expansion of the erosion zone; and greater soil compaction decreased porosity and permeability, effectively retarding the erosion process. Furthermore, a two-dimensional simplified model was established for the steady erosion stage, enabling evaluation of the development of both erosion failure modes.</div></div>","PeriodicalId":11677,"journal":{"name":"Engineering Failure Analysis","volume":"186 ","pages":"Article 110460"},"PeriodicalIF":5.7,"publicationDate":"2026-03-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145788705","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}

{"title":"Design strategy and failure study of a novel multi-cell energy absorbing box based on additive manufacturing","authors":"Shaohua Xing ,&nbsp;Sihao Guo ,&nbsp;Jian Zhao ,&nbsp;Yan Wang ,&nbsp;Xudong Sun ,&nbsp;Jiankai Wang","doi":"10.1016/j.engfailanal.2025.110492","DOIUrl":"10.1016/j.engfailanal.2025.110492","url":null,"abstract":"<div><div>Thin-walled origami structures have clear application value as energy-absorbing components in crash protection scenarios due to their excellent mechanical properties. Additive manufacturing serves as an ideal solution for the efficient fabrication of complex thin-walled structures. This work proposes a novel multi-cell origami structure (OMT) fabricated via selective laser melting. The quasi-static compression test results demonstrate that OMT exhibits higher stability in ideal plastic deformation compared to a polygonal single origami tube. Compared to polygonal single tube, the average crushing force and specific energy absorption capacity of the OMT achieved improvements of 407.06 % and 152.94 %, respectively. The numerical results verify that evolutionary structures (OMT-<em>θ</em>3 and OMT-<em>b</em>4) based on OMT effectively overcome the geometric constraints that limit the achievement of ideal plastic deformation in origami structures. The force–displacement response exhibits an excellent average crushing force and stableness of load-carrying capacity, and the crashworthiness performance is outstanding compared with related research works. In addition, the energy absorption mechanism of AL/CFRP hybrid tubes was investigated by a combined experimental and numerical approach. The effect of geometric orientation on the damage of the CFRP layer is emphasized. This work provides a new Design and preparation scheme for lightweight energy-absorbing components applied in passive safety systems.</div></div>","PeriodicalId":11677,"journal":{"name":"Engineering Failure Analysis","volume":"186 ","pages":"Article 110492"},"PeriodicalIF":5.7,"publicationDate":"2026-03-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145837835","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}

{"title":"Fatigue behavior analysis on the bolt connecting the head-cover and stay ring in pumped storage unit: Part I − fatigue test","authors":"Qiang Zhao ,&nbsp;Tianyu Zhang ,&nbsp;Kenan Du ,&nbsp;Keyuan Wang ,&nbsp;Qingyuan Song ,&nbsp;Yongyao Luo","doi":"10.1016/j.engfailanal.2025.110490","DOIUrl":"10.1016/j.engfailanal.2025.110490","url":null,"abstract":"<div><div>This paper aims to investigate the fatigue behavior analysis on the bolt connecting the head-cover and stay ring in pumped storage unit by fatigue test, to ensure the long-term safe operation of key components. Firstly, the chemical composition and properties of the bolt material 34CrNi3Mo are analyzed to reveal its characteristics. Furthermore, the test schemes for the bolt material and the head-cover bolt specimens are formulated, forming a material-component progressive test system. Finally, fatigue tests are conducted under simulated operating conditions with variable alternating loads, and the test results are comprehensively analyzed. The results show that: 1) The microstructure of the bolt material is tempered sorbite, which has excellent comprehensive mechanical properties. 2) The fatigue limit of this material is determined to be 1017 MPa by using the Up-and-Down Methods. 3) The S-N curve of 34CrNi3Mo is established through the Grouping Method, providing a reliable basis for fatigue life prediction. 4) Fatigue cracks in head-cover bolts initiate at the thread root, a typical stress concentration area, and non-metallic inclusions in the material significantly accelerate crack propagation. This research deepens the understanding of the fatigue fracture mechanism of connecting bolts and provides technical support for the design, maintenance, and reliability improvement of pumped storage unit bolts.</div></div>","PeriodicalId":11677,"journal":{"name":"Engineering Failure Analysis","volume":"186 ","pages":"Article 110490"},"PeriodicalIF":5.7,"publicationDate":"2026-03-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145880843","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}

{"title":"Dynamic interaction mechanism of deposit slope-tunnel system during heavy rainfall: insights from large-scale model experiments","authors":"Peiyu Deng ,&nbsp;Yongjie Zhang ,&nbsp;Xuefeng Ou ,&nbsp;Zongbao Yang ,&nbsp;Tao Hu","doi":"10.1016/j.engfailanal.2026.110528","DOIUrl":"10.1016/j.engfailanal.2026.110528","url":null,"abstract":"<div><div>The stability of deposit slope at tunnel portal declines rapidly under heavy rainfall, posing a serious threat to the tunnel safety. A large-scale rainfall simulation apparatus was carried out to investigate the behaviors of the deposit slope–tunnel system during heavy rainfall. Based on the similar theory, the moisture content variation characteristics, surface displacement, and the earth pressure and strain around tunnel were monitored and analyzed. The test results indicate that the deposit slope is highly sensitive to rainfall. After 60 min, parts of the slope approached saturation, with the moisture content reaching 24.5%. Furthermore, the presence of the tunnel significantly alters the seepage pathways within the slope, partially disrupting the hydraulic and mechanical continuity between the upper and lower sections. This leads to an increase in moisture content in the upper slope, which not only elevates the risk of landslides but also intensifies the interaction of the slope-tunnel system. The stress distribution within the slope–tunnel system exhibited strong compressive characteristics, with abrupt changes in stress and strain at the rock–soil interface. The maximum increase around tunnel near the interface reached 93.9% for stress and 149.2% for strain. These results clarified the interaction mechanisms of the slope–tunnel system under rainfall infiltration, offers valuable insights for mitigating similar hazards in engineering.</div></div>","PeriodicalId":11677,"journal":{"name":"Engineering Failure Analysis","volume":"186 ","pages":"Article 110528"},"PeriodicalIF":5.7,"publicationDate":"2026-03-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145880847","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}