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Determination of Key Cohesive Zone Model’s Parameters for Orthotropic Paper and Its Static Fracture Simulation 被引量:1
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作者 WANG Yue WANG Yongjian LI Lingquan 《Transactions of Nanjing University of Aeronautics and Astronautics》 EI CSCD 2021年第1期117-123,共7页
Investigation of paper cutting process is vital for the design of cutting tools,but the fracture mechanism of paper cutting is still unclear.Here,we focus on the cutting process of paper,including the key parameters o... Investigation of paper cutting process is vital for the design of cutting tools,but the fracture mechanism of paper cutting is still unclear.Here,we focus on the cutting process of paper,including the key parameters of cohesive zone model(CZM)for the orthotropic paper,to simulate the shear fracture process.Firstly,the material constants of the orthotropic paper are determined by longitudinal and transverse tensile test.Secondly,based on the tensile stressstrain curves,combined with damage theory and numerical simulations,the key parameters of the CZM for the orthotropic paper are obtained.Finally,a model III fracture is simulated to verify the accuracy of the model.Results show that the load-displacement curves obtained by the simulation is consistent with the test results. 展开更多
关键词 ORTHOTROPIC cohesive zone model(CZM) PAPER static fracture
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Failure analysis study of railway draw-hook coupler 被引量:2
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作者 Moharram MOHAMMADI Armin RAHMATFAM +1 位作者 Mohammad ZEHSAZ Soran HASSANIFARD 《Journal of Central South University》 SCIE EI CAS CSCD 2019年第4期916-924,共9页
Failure analysis of railway draw-hook coupler was carried out.The nondestructive testing method was undertaken on some failed couplers in service to designate critical areas of a coupler.Draw-Hook coupler is used to c... Failure analysis of railway draw-hook coupler was carried out.The nondestructive testing method was undertaken on some failed couplers in service to designate critical areas of a coupler.Draw-Hook coupler is used to connect with the same hook coupler or automatic coupler.The influence of each connection types on the coupler strength in this study was discussed.A numerical stress analysis using FEM was performed,and many approaches including critical plane approach were carried out on fatigue life prediction of coupler under different conditions.The results of the proposed fatigue criterion and fatigue life predictions,as well as static numerical analysis,are validated with experimental results. 展开更多
关键词 draw-hook coupler multi-axial fatigue critical plane approach life prediction static fracture force
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