基于内聚力模型的某型挂钩悬挂失效分析

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中图分类号：TJ768.2

DOI：10.3969/j.issn.1004-132X.2025.09.004 开放科学（资源服务）标识码（OSID）：

Failure Analysis of a Certain Type of Hook Suspension Based on Cohesive Zone Model

LI Zengwei1，²HOU Zewei1HONG Jiawangl QI Junyi2 1.School of Aerospace Engineering，Beijing Institute of Technology，Beijing，100080 2.Zhengzhou Aircraft Equipment Co.，Ltd.，Zhengzhou，450052

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 detachment. 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 coeficient during coating interface debonding. Results reveal that during the hook's load-bearing processes，in-plane shear stress diferences atthe interfaces between the latch coating and the substrate induce interfacial debonding，without the formationof vertical cracks.Meanwhile，the friction coeficient at the contact interfaces temporarily drops below O.O5 during debonding，which is lower than the critical sliding friction coefficient required to prevent latch slippages.

Key words： hook； friction coefficient；coating；cohesive zone model； debonding damage

0 引言

挂钩是悬挂装置中的关键部件，主要实现悬挂物的可靠挂载与安全释放[1-2]。（剩余12940字）