Damage tolerance of an architected adhesive joint
Damage tolerance of an architected adhesive joint
复制标题
设计粘合接头的损伤容限
DOI：
10.1016/j.ijsolstr.2017.06.010
复制
发表时间：
2018
影响因子：
3.6
通讯作者：
N. Fleck
中科院分区：
文献类型：
--
作者：
Kevin J. Maloney;N. Fleck
对接接头由联锁方波结构的铝合金基材和甲硅烷基改性聚合物 (SMP) 粘合剂制成。对于方波振幅和粘合剂层厚度的选定值，测量了对接接头的宏观牵引力与张开分离响应。通过对平面对接接头进行拉伸试验和对平面接头进行双搭接剪切试验，深入了解方波接头的失效机制。平面对接接头中粘合失效的机制通过显微 X 射线计算机断层扫描确定。通过光学断口分析确定方波接头的失效机制是对接接头和双搭接剪切接头中观察到的失效机制的组合，因此建立了方波接头强度和韧性的简单模型。针对方波微结构的强度、韧性和损伤容限构建设计图，以便为给定应用生成最佳拓扑。
Butt joints have been manufactured from aluminium alloy substrates of interlocking square-wave architecture and silyl-modified polymer (SMP) adhesive. The macroscopic traction versus opening separation responses of the butt joints have been measured for selected values of square-wave amplitude and thickness of adhesive layer. Insight into the failure mechanisms of the square-wave joint is obtained by performing tensile tests on planar butt joints and by performing double-lap shear tests on planar joints. The mechanisms of adhesive failure in a planar butt joint are determined by micro X-ray computed tomography. It is determined by optical fractography that the failure mechanisms in the square-wave joint are a combination of those observed in the butt and double-lap shear joints, and consequently a simple model for the strength and toughness of the square-wave joint is developed. A design map is constructed for the strength, toughness and damage-tolerance of the square-wave micro-architecture in order to generate the optimal topology for a given application.