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Exploring the mechanical and sensing capabilities of multi-material bonded joints with carbon nanotube-doped adhesive films

机译：探索掺有碳纳米管的胶膜的多材料粘合接头的机械和传感能力

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摘要

Single lap shear tests are carried out at the joints of similar and dissimilar materials, and their electrical resistance through thickness is monitored to evaluate their sensing capabilities. Al-Al and carbon fibre reinforced polymer (CFRP)-Al joints are manufactured with two types of surface treatments of the Al substrates: brushing (B) and grit blasting (GB). The lap shear strength (LSS) is higher with grit blasting due to the optimum surface roughness and the creation of an active surface. Carbon nanotube (CNT)-doped samples are detrimental to the LSS in Al-Al joints compared to the neat adhesive, while a slight increase in LSS for CFRP-Al and CFRP-CFRP is observed due to a better CNT-CFRP interaction and good load transfer between the substrates. Electrical monitoring tests are strongly influenced by the surface treatment with better adhesive-substrate interfaces leading to a more stable response and higher sensitivity, proving the high applicability of the proposed technique.
机译：在相似和不相似材料的接缝处进行单搭接剪切测试，并监测其通过厚度的电阻，以评估其感应能力。 Al-Al和碳纤维增强聚合物（CFRP）-Al接头是通过对Al基材进行两种类型的表面处理制成的：刷涂（B）和喷砂（GB）。喷砂处理的搭接剪切强度（LSS）更高，这是因为其具有最佳的表面粗糙度和形成了活性表面。与纯胶相比，掺杂碳纳米管（CNT）的样品对Al-Al接头中的LSS有害，而观察到CFRP-Al和CFRP-CFRP的LSS略有增加，这是由于更好的CNT-CFRP相互作用和良好的基板之间的负载转移。电气监视测试受到表面处理的影响，具有更好的粘合剂-基材界面，从而导致更稳定的响应和更高的灵敏度，证明了所提出技术的高度适用性。

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