基于ABAQUS方格芯材结构的模拟与制备

Calculation and Preparation of Lattice Core Structure Based on A BAQUS

利用ABAQUS软件对PP和HDPE两种高聚物制备的芯材结构进行有限元分析,建立了三点弯曲与拉伸有限元模型,分别对2种模型设定了装配、分析步、边界条件并划分网格。根据模型结构分别对壁厚为1~4 mm的方格进行仿真分析,研究方格芯材在弯曲和拉伸作用下的应力分布,研究结果发现,随着方格胞元壁厚的增加,复合材料的Mises应力均逐渐增大,并且,当壁厚为4 mm时,复合材料的弯曲强度和拉伸强度的模拟值达到最大值,分别为32.15 MPa与26.28 MPa。根据模拟结果制备了壁厚为4 mm的PP/HDPE方格芯材复合材料,测试了方格芯材的力学性能,其中,材料的弯曲强度与拉伸强度分别为29.03 MPa和24.94 MPa,均低于模拟值。但是,与PP相比,方格芯材的弯曲强度与拉伸强度的实验值分别提高了14.52%与18.59%,缺口冲击强度提高了16.07%。

Based on ABAQUS platform,the finite element analysis of PP and HDPE core materials was carried out,and the three-point bending and stretching finite element models were established.The assembly,analysis steps,boundary conditions and meshing of the two models were set respectively.Based on the model structure,the stress distribution of the square core material under bending and tension was studied by simulation analysis of the square core material with 1~4 mm wall thickness.It was found that with the increase of the cell wall thickness,the Mises stress of the composite increased gradually.When the wall thickness was 4 mm,the simulation values of bending strength and tensile strength reached the maximum,which were 32.15 MPa and 26.28 MPa,respectively.According to the simulation results,PP/HDPE square core composites with wall thickness of 4 mm were prepared,and the mechanical properties of the core materials were tested.The bending strength and tensile strength were 29.03 MPa and 24.94 MPa respectively,which were lower than the simulation values.However,compared with PP,the experimental values of bending strength and tensile strength were increased by 14.52%and 18.59%respectively,and the notched impact strength was increased by 16.07%.