Determination of the strength of polymer-metal interfaces under mixed mode loading using butt-bonded hollow cylinders
Determination of the strength of polymer-metal interfaces under mixed mode loading using butt-bonded hollow cylinders
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DOI：
10.1016/j.ijadhadh.2018.11.009
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发表时间：
2019-03-01
影响因子：
3.4
通讯作者：
Lampke, Thomas
中科院分区：
文献类型：
--
作者：
Saborowski, Erik;Kiessling, Robert;Lampke, Thomas
这一贡献涉及一种新的测试方法，用于确定剪切，拉伸和剪切-拉伸复合载荷下的聚合物-金属界面的强度的调查。为此，试样的几何形状，可独立于材料配对展开，由模拟参数研究确定。在相应的有限元模拟中，内聚区方法应用于界面和用户定义的聚合物材料模型。模拟结果进行了验证，从铝/聚酰胺6混合制造的热压。这里，NiAl 5热喷涂层用作机械粘附促进剂。数值计算和实验结果证明，所确定的几何形状非常适合于确定聚合物-金属界面的强度。此外，实验结果表明，二次应力损伤启动准则的内聚区模型是不适合所研究的界面。因此，提出了一种替代的损伤起始准则。
This contribution deals with the investigation of a novel testing approach for identifying the strength of polymer metal interfaces under shear, tensile and combined shear-tensile load. To this end, a specimen geometry, being deployable independent on the material pairing, is determined by a simulative parameter study. Within the according finite element simulations, the cohesive zone approach is applied for the interface and a user-defined material model for the polymer. The simulation results are validated from an aluminum/polyamide 6 hybrid manufactured by hot pressing. Here, a NiAl5 thermal spray layer is utilized as mechanical adhesion promoter. The numerical as well as the experimental results prove that the identified geometry is well suited to determine the strength of polymer-metal interfaces. Furthermore, the experimental results reveal that the quadratic stress damage initiation criterion for the cohesive zone model is not appropriate for the investigated interface. Consequently, an alternative damage initiation criterion is proposed.