关键词: 温度, 力学性能, 抗起皱性能；方板对角拉伸试验

Abstract:

Thin sheet will be heated after a period of time's rapid continuous cold forming and its buckling-resistance will be influenced. In  order to investigate the consequence of temperature variation on the sheet's buckling-resistance, uniaxial tensile experiments and YBT at different temperatures were performed. The properties of thin sheet at 23℃, 75℃ and 150℃ were acquired respectively  and it is found that the elasticity modulus, yield stress and tangent modulus decrease when temperature rises. The finite element simulations of YBT at different temperatures were done with the property's parameters obtained, and a good agreement between   force-displacement curves of YBT and the simulations is found. The comparison of results of YBT and the finite element simulations indicates that thin sheet's buckling-resistance is susceptible to the changes of temperature and it goes through the change processes of rise and fall when temperature rises from room temperature to 150℃.

Key words: temperature, mechanical properties, buckling-resistance, Yoshida buckling test(YBT)