含裂口损伤复合材料层合板拉伸试验及数值模拟分析

通过对无损、含损(不同长度的裂口损伤)的碳纤维复合材料层合板进行拉伸试验,研究了裂口损伤形式对碳纤维复合材料层合板拉伸性能的影响。经试验研究,碳纤维复合材料无损层合板的拉伸强度为517.37MPa;且裂口损伤使碳纤维复合材料层合板的拉伸性能显著降低。相比无损层合板的拉伸性能,裂口为5mm的层合板拉伸强度降低26.3%,裂口为15mm的层合板拉伸强度降低23.4%。采用基于三维渐进损伤失效准则编写的子程序对碳纤维复合材料层合板进行拉伸数值模拟分析,模拟了含损层合板的损伤起始过程。通过与试验结果进行比较,验证了模型的合理性。

Tensile Test and Numerical Simulation Analysis of Composite Laminates With Crack Damage

The crack damage forms on the tensile properties of carbon fiber composite laminated plates and the effect of damage by tensile test of nondestructive,containing loss (the crack damage of different the length) of carbon fibre composite laminated plate have been studied.The tensile strength of carbon fiber composite laminates is 517.37MPa,and the tensile properties of carbon fiber composite laminates are significantly reduced.Compared with the tensile properties of non-destructive laminates,the tensile strength of laminates with a crack of 5mm was reduced by 26.3％ and the tensile strength of laminates with a crack of 15mm was reduced by 23.4％.Tensile numerical simulation analysis was carried out on the carbon fibre composite laminated plates based on the three-dimensional progressive damage failure criterion subroutines,including loss of laminated plates at damage initiation and extension stages.A good agreement was found between the predicted results and the test data.