Mechanical properties and forming behaviour of laminated steel/polymer sandwich systems with local inlays - Part 1
Mechanical properties and forming behaviour of laminated steel/polymer sandwich systems with local inlays - Part 1
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DOI：
10.1016/j.compstruct.2014.07.011
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发表时间：
2014-12-01
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;Sokolova, Olga;Palkowski, Heinz
采用辊压复合技术制备了不同芯层厚度的钢/聚合物/钢夹层材料。在恒定的表皮厚度，芯厚度的变化对机械性能，特别是它们的比刚度和强度的影响，进行了研究。此外，SM用钢嵌体局部加固，以改善其在局部加载或接合的情况下抵抗尺寸变化或芯退化的行为。研究了在拉深成形条件下，增强体（RE）对应变分布的影响。使用摄影测量法测量应变。为了考虑各向异性的影响，在这个意义上，一个必要的各向异性评价进行了SM，以评估他们的formingbehaviors. Results之间的测量结果显示了足够的协议SM的力学性能和估计值遵循规则的混合物。核心体积分数高达约。0.37，与整体钢材料相比，SM的比刚度和强度值仅略微降低。变形分析表明，显着的影响，插入的RE的应变分布和故障，因此开裂的位置，发生在底部/边缘区域前面的RE。(C)2014爱思唯尔有限公司版权所有。
Steel/polymer/steel sandwich materials (SMs) with varying core thickness were produced using the roll bonding technology. At constant skin thickness, the effect of the core thickness change on the mechanical properties, particularly their specific stiffness and strength, was investigated. Additionally, the SMs were locally reinforced with steel inlays to improve their behaviour against dimension changes or the degradation of the core in case of local loading or joining. The effect of the reinforcement (RE) on the strain distribution under deep drawing conditions was studied. Strains were measured using photogrammetry. To take into account the influence of anisotropy in this sense, an essential anisotropy evaluation was carried out for the SMs to assess their forming behaviour.The results revealed an adequate agreement between the measured mechanical properties of SMs and the estimated values following the rule of mixtures. Up to a core volume fraction of approx. 0.37, the specific stiffness and strength values of the SMs are only slightly reduced compared to the monolithic steel material. The deformation analysis shows a significant influence of the inserted REs on the strain distribution and failure and consequently the position of cracking, occurring at the bottom/edge region in front of the RE. (C) 2014 Elsevier Ltd. All rights reserved.