中国机械工程2025，Vol.36Issue(9)：1934-1941,8.DOI:10.3969/j.issn.1004-132X.2025.09.004
基于内聚力模型的某型挂钩悬挂失效分析
Failure Analysis of a Certain Type of Hook Suspension Based on Cohesive Zone Model
摘要
Abstract
During the mount tests of a certain type of hook,Cd-Ti coating of latch was delaminated,and caused the latch slide downward,then the suspension might deflected,posing a risk of suspension de-tachment.A research on this risk was conducted.Based on cohesive zone model,a finite element model of the hook under load was established,incorporating predefined vertical cracks and interfacial cracks.The crack damage factor was employed to determine the crack failure modes,and a local contact model of the stop arm/latch was developed to investigate the variations in friction coefficient during coating interface debonding.Results reveal that during the hook's load-bearing processes,in-plane shear stress differences at the interfaces between the latch coating and the substrate induce interfacial debonding,without the forma-tion of vertical cracks.Meanwhile,the friction coefficient at the contact interfaces temporarily drops below 0.05 during debonding,which is lower than the critical sliding friction coefficient required to prevent latch slippages.关键词
挂钩/摩擦因数/镀层/内聚力模型/脱黏损伤Key words
hook/friction coefficient/coating/cohesive zone model/debonding damage分类
军事科技引用本文复制引用
李增伟,侯泽伟,洪家旺,祁军义..基于内聚力模型的某型挂钩悬挂失效分析[J].中国机械工程,2025,36(9):1934-1941,8.基金项目
国家自然科学基金(12102007) （12102007）
