刀具结构对CFRP/Al制孔分层损伤影响的仿真研究

Finite Element Analysis on Influence Which Tool Structure Impose on Delamination Damage of CFRP/Al Stacks

建立了不同结构刀具钻削CFRP/Al叠层板的有限元仿真模型,应用有限元仿真软件ABAQUS对CFRP/Al叠层板制孔过程中CFRP层间分层损伤特征及原因进行了仿真研究,并进一步分析了刀具结构对CFRP层间分层损伤的影响。研究结果表明:CFRP层间分层损伤形貌为椭圆型,椭圆长轴所在方向和纤维方向一致;套料钻制孔的CFRP层间分层损伤在相同层间位置比PCD麻花钻小得多。

Building drilling CFRP/AI finite element simulation of different tool structure,which applied the finite ele- ment analysis software ABAQUS,had simulated the characteristic and formation mechanism of the delamination damage of carbon fiber reinforeed plastic in the process of drilling CFRP/AI,and analyzed the influence which the tool structure had imposed on the delamination damage of CFRP/Al laminated construction. The results show that the delaminalion damage morphology of CFRP interlayer is elliptic,and the direction of elliptical long axis has the same direction with the fiber of CFRP;CFRP inter-layer delamination damages in hole drilling with a core drill are to a much less extent than those with a PCD twist drill in the same inter-layer position.