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针对具有典型铺设角[0/45/-45/90]的开孔碳纤维层合板,采用三维有限元数值模拟方法,分析了在单向拉伸载荷作用下孔边附近的层间应力,讨论了界面层参数对层间应力的影响,详细给出了典型铺设角之间层间应力的分布规律和最大层间应力产生的位置。结果表明:对于相同铺设角的界面层,沿厚度方向的位置影响层间应力的大小,但不影响分布趋势;而铺层顺序(如[角度1/角度2]或[角度2/角度1])对层间应力的大小和分布趋势影响则较小。最大层间正应力产生于[-45/90]的界面层,位于与拉伸方向成90°的位置,是外加拉伸应力的51%;最大层间剪应力产生于[-45/0]的界面层,最大层间环向剪应力位于与拉伸方向成74°的位置,是外加拉伸应力的64%;而最大层间径向剪应力位于与拉伸方向成66°的位置,是外加拉伸应力的25%。
For the CFRP with typical laying angle [0/45 / -45 / 90], the three-dimensional finite element numerical simulation method is used to analyze the interlayer stress near the hole edge under uniaxial tensile load. The influence of interface parameters on interlayer stress is given in detail. The distribution law of interlayer stress between typical laying angles and the location of the maximum interlayer stress are given in detail. The results show that the thickness of the interfacial layer with the same lay angle affects the magnitude of interlaminar stress but does not affect the distribution trend; while the lamination order (such as [angle1 / angle2] or [angle2 / angle1] ) Has less influence on the magnitude and distribution trend of interlayer stress. The maximum interfacial normal stress is generated in the [-45 / 90] interfacial layer at a position 90 ° to the tensile direction, which is 51% of the applied tensile stress. The maximum interlaminar shear stress results from [-45/0] Of the interfacial layer, the maximum interlaminar circumferential shear stress is located at a position of 74 ° with respect to the stretching direction, which is 64% of the applied tensile stress; and the interlaminar radial shear stress is located at a position of 66 ° with respect to the stretching direction, It is 25% of the applied tensile stress.