Mechanical properties and forming behaviour of laminated steel/polymer sandwich systems with local inlays - Part 2: Stretching and deep drawing
Mechanical properties and forming behaviour of laminated steel/polymer sandwich systems with local inlays - Part 2: Stretching and deep drawing
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DOI：
10.1016/j.compstruct.2016.10.111
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发表时间：
2017-01-15
影响因子：
6.3
通讯作者：
Palkowski, Heinz
中科院分区：
文献类型：
--
作者：
Harhash, Mohamed;Carrado, Adele;Palkowski, Heinz
在第一部分中，对钢/聚合物/钢夹层（SMs）组合的力学性能和深冲成形进行了基础研究，研究了一种增强型SMs（R-SMs）。介绍了不同几何形状、尺寸、材料和位置的增强体对拉伸和拉深性能的影响。此外，考虑了具有不同力学性能和皮芯厚度的增强SM的影响。因此，使用厚度为0.49 mm和0.24 mm的可深冲钢等级。对于芯部，使用厚度为0.3 mm和0.6 mm的聚烯烃（PP-PE）箔。如果RE位于成形区域（靠近冲头），则发现深冲性能显著降低，然而，如果RE位于凸缘区域，则仅局部降低。结果表明，在法兰中加入稀土对拉深力没有显著影响，但对拉深时杯形件高度所代表的成形势有显著影响，拉深结果表明，增大稀土尺寸会降低成形势。RE与相邻的芯层形成尖锐的界面，加速了失效。发现RE几何形状的影响可以忽略不计，然而，与网状RE相比，固体RE显示出降低的成形极限。(C)2016爱思唯尔有限公司版权所有
In part 1, a fundamental study on mechanical properties and deep drawing of a steel/polymer/steel sandwich (SMs) combination was accomplished investigating one type of reinforced SMs (R-SMs). In this part, the effect of reinforcements (REs) with different geometries, sizes, materials and locations on stretching and deep drawability is introduced. Additionally, the influence of reinforcing SMs with different mechanical properties and skin/core thicknesses is considered. Therefore, a deep drawable steel grade with thicknesses 0.49 mm and 0.24 mm was utilized. For the core polyolefin (PP-PE) foils with thicknesses of 0.3 mm and 0.6 mm were used.Substantial reduction of the deep drawability was found if the RE is located in the forming region (close to the punch), however, only locally if located in the flange area. Inserting the RE in the flange has no remarkable effect on the drawing force but on the forming potential represented by the cup height at failure.The stretching results show that increasing the RE size reduces the forming potential. The RE creates a sharp interface with the neighbour core layer accelerating failure. A negligible effect of the RE geometry was found, however solid REs show reduced forming limits compared to the mesh-like ones. (C) 2016 Elsevier Ltd. All rights reserved.