Correlation between weld seam morphology and mechanical properties in laser transmission welding of polypropylene
Correlation between weld seam morphology and mechanical properties in laser transmission welding of polypropylene
复制标题
聚丙烯激光透射焊接焊缝形貌与力学性能的相关性
DOI：
10.1016/j.procir.2020.09.119
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发表时间：
2020
期刊：
影响因子：
--
通讯作者：
S. Will
中科院分区：
文献类型：
--
作者：
M.-L. Röhricht;T. Stichel;S. Roth;P. Bräuer;M. Schmidt;S. Will
在聚合物激光焊接中，焊缝的形态对于焊接强度至关重要。通常，需要进行耗时的参数筛选和随后的破坏性测试，以便找到合适的工艺参数集，从而产生坚固的焊缝。为了更有效和灵活的工艺开发，基于焊接区晶体结构检测等的无损表征方法需要深入了解焊缝形态和强度之间的相互关系。因此，在使用拉伸测试之前和之后，通过显微镜对重叠焊接的聚丙烯样品的热影响区晶体结构进行分析，以量化焊接强度。实验结果表明，吸收连接件中力的增加与焊缝横截面积之间几乎存在线性关系。此外，研究表明，热有限元模拟可以预测热影响区的尺寸，这对焊缝内部的晶体结构有很大影响。
In laser welding of polymers, the morphology of weld seams is decisive for the weld strength. Usually, time consuming parameter screening with subsequent destructive tests are performed in order to find suitable process parameter sets resulting in strong weld seams. For more effective and flexible process development, non-destructive characterization methods which base on, for example, crystal structure detection in the welding zone require a deep understanding of interrelations between weld seam morphology and strength.Therefore, polypropylene samples welded overlapping are analysed regarding crystal structure in the heat-affected zones by microscope before and after tensile testing is used to quantify the weld strength. Experimental results show that there is an almost linear relationship between the increase in force and the cross-sectional area of weld seams in the absorption joining partner. Moreover, it is shown that thermal FE simulations allow the prediction of the size of the heat affected zone, which strongly influences the crystal structures inside the weld.
工程化学：Von der Synthese bis zur Anwendung
影响因子：
6.1
作者：
W. Kaiser
通讯作者：
W. Kaiser