In-plane biaxial compression and tension testing of thin sheet materials
In-plane biaxial compression and tension testing of thin sheet materials
复制标题
DOI：
10.1016/j.ijsolstr.2015.03.031
复制
发表时间：
2015-08
影响因子：
3.6
通讯作者：
B. Zillmann;M. Wagner;S. Schmaltz;E. Schmidl;T. Lampke;K. Willner;T. Halle
中科院分区：
文献类型：
--
作者：
B. Zillmann;M. Wagner;S. Schmaltz;E. Schmidl;T. Lampke;K. Willner;T. Halle
压缩载荷作用下织构金属板的详细实验数据对于描述其拉压不对称性是非常重要的。这对于表现出强度差异效应的材料或发生包辛格效应的材料尤其需要。到目前为止，还没有对二维应力空间中第三象限进行系统描述的工作。本文提出了一种新的薄板双轴面内压缩试验装置。在应变控制装置上进行了双轴和单轴压缩试验，分析了经过蒙皮处理和未经过蒙皮处理的深冲钢板的拉伸性能。此外，为了允许屈服表面的实验描述，进行双轴拉伸试验。对新型双轴压缩试验试样和十字形双轴拉伸试验试样进行了详细的数值验证和试验应变分析，结果表明：新型双轴压缩试验试样和十字形双轴拉伸试验试样的应变分布较为均匀。本文提出的实验与数值相结合的方法可以评估薄板材料的拉压不对称性。蒙皮通过条件下的结果明显显示出拉压不对称，这突出了已经在接收材料条件下进行双轴压缩试验的必要性。双轴压缩试验为更详细地分析薄板在双轴压缩载荷下的流动特性开辟了途径。
Detailed experimental data on the behavior of textured sheet metals under compressive loading is important to describe their tension–compression asymmetry. This is particularly needed for materials that exhibit a strength-differential effect, or in cases where the Bauschinger effect occurs. So far, there is no systematic work describing the third quadrant in the 2D stress space under biaxial compressive loading. This paper presents a new device for biaxial, compressive in-plane testing of thin sheets. Biaxial and uniaxial compression experiments are carried out in the strain controlled device, analyzing the behavior of deep drawing steel sheets with and without skin-pass treatment. Moreover, in order to allow for the experimental description of the yield surfaces, biaxial tensile tests are performed. Detailed numerical validations and experimental strain analysis both for the new specimen for biaxial compressive testing and for the cruciform specimen for biaxial tensile testing show that reasonably homogeneous strain distributions can be achieved. The combined experimental and numerical method presented here allows to evaluate the tension–compression asymmetry of thin sheet materials. The results for the skin-passed condition clearly exhibit a tension–compression asymmetry, which highlights the necessity of biaxial compression tests already in the as-received material condition. The biaxial compression test opens a pathway to a more detailed analysis of the flow behavior of thin sheets under biaxial compression loading.