Modeling of the quantitative effect of temperature on key mechanical properties of metal foams

In this study, the effect of temperature and external force on the plastic collapse of metal foams was briefly analyzed firstly. Subsequently, the maximum energy density for the plastic collapse of the material at different temperatures was put forward. Finally, a temperature-dependent energy absorption model, a temperature-dependent plastic collapse strength model, and a temperature-dependent plateau stress model were developed. The proposed models have no fitting parameters and simple structure. The accuracy and practicality of the models are well verified by comparison with the available 12 sets of experimental data over a wide temperature range (the highest temperature reached 0.83T(m)). The temperature-dependent energy absorption model and the temperature-dependent plastic collapse strength only need data at room temperature to quickly predict their energy absorption and plastic collapse strength at different temperatures. These two models can be used as an optional method for rapidly assessing the high-temperature mechanical properties of metal foams. This work has important implications for the further development of metal foams applications in high-temperature service environments such as aerospace.

Automated summary

This study analyzed the effect of temperature and external force on the plastic collapse of metal foams, proposed energy density and models for the plastic collapse at different temperatures. The models are accurate and practical, enabling rapid prediction of energy absorption and plastic collapse strength of metal foams at different temperatures.