基于发动机吊耳材料非线性的有限元仿真研究

为了研究弹性材料与非线性材料在发动机吊耳有限元分析中对结果的影响,通过拉伸试验获取发动机吊耳所用材料的应力应变数据,利用有限元方法对发动机起吊过程进行仿真分析。仅采用材料的弹性属性时,当应力超过屈服极限后,所产生的应力为虚假应力,远大于实际情况;考虑材料的非线性属性时,仿真结果与发动机实际吊装情况一致,因此,证实基于材料非线性对发动机吊耳进行有限元仿真方法的有效性。

Finite Element Simulation of Engine Lug Strength with the Material Nonlinear

Research elastic material and nonlinear materials in the process of simulation engine lug influence on the results,obtained the materials stress-strain data of engine lug by a tensile test,using the finite element method simulation analysis was carried out on the engine operation process.Using elas?tic behavior of the material,when the stress exceeds the yield limit,The stress was false stress,greater than the actual situation.Considering the nonlinear behavior of materials,the simulation results are con?sistent with such as actual lifting and therefore confirmed the validity of engine lug the finite element sim?ulation method based on the material nonlinearity.