Influence of Thin-Film Adhesives in Pullout Tests Between Nickel-Titanium Shape Memory Alloy and Carbon Fiber-Reinforced Polymer Matrix Composites

[摘要] Strips of nickel-titanium (NiTi) shape memory alloy (SMA) and carbon fiber-reinforced polymer matrix composite (PMC) were bonded together using multiple thin film adhesives and their mechanical strengths were evaluated under pullout test configuration. Tensile and lap shear tests were conducted to confirm the deformation of SMAs at room temperature and to evaluate the adhesive strength between the NiTi strips and the PMC. Optical and scanning electron microscopy techniques were used to examine the interfacial bonding after failure. Simple equations on composite tensile elongation were used to fit the experimental data on tensile properties. ABAQUS models were generated to show the effects of enhanced bond strength and the distribution of stress in SMA and PMC. The results revealed that the addition of thin film adhesives increased the average adhesive strength between SMA and PMC while halting the room temperature shape memory effect within the pullout specimen.

[发布日期] 2018-02-01

[学科分类] 复合材料

[关键词] POLYMER MATRIX COMPOSITES;SHAPE MEMORY ALLOYS;ADHESION;EPOXY MATRIX COMPOSITES;FIBER COMPOSITES;NICKEL ALLOYS;TEMPERATURE EFFECTS;TITANIUM ALLOYS;THIN FILMS;BONDING;FAILURE;JOINTS (JUNCTIONS)