脱粘损伤对压缩载荷下夹芯复合材料L形节点承载能力的影响

Effect of Debonding Damage on Bearing Capacity of Sandwich Composite L-joints under Compressive Load

针对含有脱粘损伤的夹芯复合材料L形节点在压缩载荷下的承载能力问题,采用渐进失效分析和内聚力模形探讨脱粘损伤的位置、尺寸等因素对压缩载荷下的L形节点极限承载力的影响,结果表明,肘板上端的脱粘损伤相对于肘板中心的脱粘损伤对压缩载荷下的承载能力影响更大,随着损伤尺寸的增大,肘板上端脱粘损伤的影响更明显。

The progressive failure analysis and cohesive zone model were used to study the bearing capacity of L-joints of sandwich composites with debonding damage under compressive loads. The influence of the location and size of debonding damage on the ultimate bearing capacity of L-joints under compressive load is discussed. The results showed that the debonding at the end of the elbow plate has a greater impact on the bearing capacity under compressive load than that at the center of the elbow plate, and the effect of debonding damage at the end of the elbow plate is more obvious with the increase of the damage size.