基于ABAQUS二次开发变角度层合板屈曲特性分析

基于ABAQUS二次开发,探究周期函数曲线纤维路径变角度复合材料层合板的屈曲特性。首先,以正弦曲线为基本参考路径为例,得到纤维角度的变化规律;然后,利用Python编写变角度复合材料层合板的有限元分析前处理程序,开发出ABAQUS交互式界面;最后,利用本文开发的GUI插件,对经典定角度和变角度层合板进行屈曲分析。结果表明,变角度层合板的屈曲载荷有很大提高,并且随着幅值参数A和周期参数T逐渐增大,一阶线性屈曲均是呈先增大后减小的趋势,因此基于铺层稳定性,参数应控制在相应的范围。采用Python对ABAQUS进行二次开发,从而实现变角度层合板的自动建模和计算分析,为实际工程研究提供了研究思路和流程,有一定的实践意义。

Analysis of Buckling Properties of Variable Angle Laminated Plates Based on Secondary Development of ABAQUS

Based on the secondary development of ABAQUS, the buckling properties of variable angle composite laminates with periodic function curves were explored. Firstly, taking the sinusoidal curve as the basic reference path the change law of the fiber angle was obtained; Secondly, the finite element analysis pre-processing program of variable angle composite laminates was written by Python and developed ABAQUS interactive interface.Finally, the buckling analysis of the classical fixed angle and variable angle laminates was carried out with using the GUI plug-in. The results show that that the buckling load of the variable angle laminates is obviously improved, and the first order linearity buckling is first increased and then decreased with the increases of amplitude parameter A and period parameter T, so considering the stability of the ply, the parameters should be controlled in the corresponding range. The secondary development of ABAQUS by Python is used to realize the automatic modeling and computational analysis, which provides research ideas and processes for practical engineering research, and has certain practical significance.