Abstract Adhesive-bonded joints in carbon fibre-reinforced polymer laminates are cost effective, but their fatigue cracking potential currently limits aerospace certification. We investigated the concurrent use of Z-pins for crack arrest (including an analysis of underlying mechanisms) and structural health monitoring (SHM) in adhesive-bonded composite lap joints. The use of Z-pins resulted in a crack arrest capacity 33% higher than the joint's static limit load and produced a residual strength that far exceeded current ultimate loads (250 versus 150% of the limit load). The electrical resistance in the Z-pins was consistent with observed trends in crack growth, suggesting its viability for SHM.

中文翻译：

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同时使用 Z 形销在粘合复合材料搭接接头中进行裂纹抑制和结构健康监测

摘要 碳纤维增强聚合物层压板中的粘合剂粘合接头具有成本效益，但其疲劳开裂潜力目前限制了航空航天认证。我们研究了 Z 形销在粘合剂粘合复合材料搭接接头中同时使用的裂纹抑制（包括潜在机制分析）和结构健康监测 (SHM)。Z 形销的使用导致裂纹止裂能力比接头的静态极限载荷高 33%，并产生远远超过当前极限载荷的残余强度（250 对 150% 的极限载荷）。Z 型销中的电阻与观察到的裂纹扩展趋势一致，表明其适用于 SHM。