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Deformation Mechanism in Mechanically Coupled Polymer–Metal Hybrid Joints

机译：机械耦合的聚合物-金属混合接头的变形机理

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In this, work, metal inserts were joined with polyamide 6 by using the injection-molding technique. The metal parts, made of steel grade DC 04, were mechanically interlocked with polyamide 6 (PA6) by rivets as a mechanical connection between both components in the form of s polymer filling the holes in the metallic parts. The mechanical-interlocking joints made of steel/PA6 were mechanically tested in a tensile-lap-shear test. The damage behavior of the joined materials in relation to rivet number and position on the metal plate was studied. The observation of rivet deformation was also conducted by infrared IR thermography. The study showed that, for polymer–metal joined samples with fewer than three rivets, the destruction of rivets by shearing meant sample damage. On the other hand, when the polymer–metal joint was made with three or four rivets, the disruption mechanism was mostly related to the polymer part breaking. The maximal values of the joint’s failure force under tensile-shear tests were achieved for samples where three rivets were used. Moreover, strong correlation was found between the surface temperature of the samples and their maximal force during the tensile-lap-shear test.
机译：在这项工作中，金属嵌件通过使用注射成型技术与聚酰胺6连接在一起。由DC 04级钢制成的金属零件通过铆钉与聚酰胺6（PA6）机械互锁，作为两个零件之间的机械连接，其形式为聚合物填充金属零件中的孔。由钢/ PA6制成的机械互锁接头在拉伸剪切试验中进行了机械测试。研究了连接材料的损伤行为，与铆钉数量和在金属板上的位置有关。铆钉变形的观察也通过红外IR热成像法进行。研究表明，对于少于三个铆钉的聚合物-金属连接的样品，通过剪切破坏铆钉会破坏样品。另一方面，当聚合物-金属接头由三个或四个铆钉制成时，破坏机理主要与聚合物零件的断裂有关。对于使用三个铆钉的样品，在拉伸剪切试验下获得了关节破坏力的最大值。此外，在拉伸-搭接-剪切试验期间，发现样品的表面温度与其最大力之间存在很强的相关性。

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