铝合金2A12在热冲击条件下的力学性能

测试并确定航空航天材料在复杂高速热冲击条件下的强度极限等关键参数,对于航空航天材料和结构的可靠性评定、寿命预测以及高速飞行器的安全设计具有重要的意义.针对强度设计手册中没有航空航天材料在高速热冲击环境下的强度极限等表征参数的现状,使用自行研制的高速飞行器瞬态气动热试验模拟系统,对铝合金材料2A12在多种不同的瞬态热冲击条件下,进行气动加热模拟与热载联合试验研究,得到在瞬态热、力学环境的共同作用下铝合金2A12材料的强度极限等力学性能变化状况.为研究分析航空航天材料和结构在高速热冲击环境下的承载能力和结构减重提供可靠依据. 

Mechanical properties of 2A12 Al alloy at transient heating

Testing and determining the pivotal parameters such as ultimate strength and thermal stress at the complicated condition of transients heating is very important to the reliability estimate, life prediction of aerospace materials and security design of the high-speed flight vehicle. Because there are no ultimate strength and other important token parameters at high temperature transients heating environment in the intensity design handbook yet, the high temperature ultimate strength and other mechanical properties of 2A12 A1 alloy under different transient heating temperature and load environments was obtained by using experimental simulation system of the transients aerodynamic heating for high-speed flight vehicle. Reliable basis was provided for studying the loading capacity and weight lightened of aerospace materials and structure at transient heating environment.