5A06铝合金材料高温热物理参数的工程估算方法

5A06(LF6)铝合金是一种基本的焊接结构材料,但该合金的热物理参数,尤其是在较高温度范围内的材料属性在一般工程条件下很难确定,对工程计算的准确性有很大影响.基于工程试验结果确定了5A06铝合金结构的最佳退火温度,根据该结构在不同温度退火消应力处理后的变形回弹量,建立有限元模型,应用ANSYS中的灵敏度与概率设计(PDS)系统对该材料的热物理性能进行估算.结果表明,估算所得的热物理参数值基本符合工程实际,所采用的概率分析方法为估算材料的高温热物理参数提供了一种唯象的有效工程手段.

Engineering estimation method of 5A06 aluminum alloy's material properties by PDS

The 5A06 aluminum alloy is one kind of basic welding materials, but its thermo phy sical parameters, especially at the high temperature, have been hardly determined under the general project condition, which have great influence on the accuracy of engineering computation.The best annealing temperature of 5A06 Al alloy was confirmed with engineering experiment, based on the rebound after annealing, and the finite element model was built, and the thermo physical parameters were estimated with the probability design system (PDS)in the finite element software ANSYS.The analysis indicated that, the obtained material attribute values accord with the project reality.The use of the probability design system provides one of the phenomenological effective methods for the solution of the unknown material attributes.