Abstract The fracture failure of a bonded structure is closely related to the service temperature. In this study, based on the failure criterion of an adhesive structure at room temperature and considering the influence of temperature sensitivity on an adhesive structure, ISR-7008/aluminum alloy adhesive joints in the vehicle service temperature range (−40–80 °C) were taken as examples to establish the full service temperature range fracture failure criterion based on the equivalent stress. Adhesive dumbbell-type specimens were made, and adhesive joints with angles of 0°, 30°, 45°, 60° and 90° were designed. The tensile test was conducted at seven typical temperature points in the service temperature range: −40 °C, −20 °C, 0 °C, 25 °C, 40 °C, 60 °C and 80 °C. By analyzing the stress state of the failure position and failure point of the bonded structure, it was found that the equivalent stress composed of the stress component can satisfy all of the conditions and can be used as the failure criterion for the adhesive joint. The application results of the failure criterion show that the maximum relative error of the test and simulation results is 17.36%, the average relative error is 10.75%, and the related precision meets the requirements of engineering applications.

中文翻译：

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考虑温度敏感性的粘结结构断裂破坏准则研究

摘要 粘结结构的断裂失效与使用温度密切相关。本研究基于常温下胶粘结构的破坏准则，并考虑温度敏感性对胶粘结构的影响，ISR-7008/铝合金胶粘接头在车辆使用温度范围内（-40-80°C）以等效应力为基础，建立全服役温度范围断裂失效准则。制作了粘性哑铃型试件，设计了0°、30°、45°、60°、90°角度的粘接接头。拉伸试验在使用温度范围内的七个典型温度点进行：-40°C、-20°C、0°C、25°C、40°C、60°C和80°C。通过对粘接结构失效位置和失效点的应力状态进行分析，发现由应力分量组成的等效应力可以满足所有条件，可以作为粘接接头的失效准则。失效准则的应用结果表明，试验和仿真结果的最大相对误差为17.36%，平均相对误差为10.75%，相关精度满足工程应用要求。