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 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 formation 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.
| Translated title of the contribution | 基 于 内 聚 力 模 型 的 某 型 挂 钩 悬 挂 失 效 分 析 |
|---|---|
| Original language | English |
| Pages (from-to) | 1934-1941 |
| Number of pages | 8 |
| Journal | Zhongguo Jixie Gongcheng/China Mechanical Engineering |
| Volume | 36 |
| Issue number | 9 |
| DOIs | |
| Publication status | Published - 25 Sept 2025 |
| Externally published | Yes |
Keywords
- coating
- cohesive zone model
- debonding damage
- friction coefficient
- hook