Experimental analysis of lead behavior

机译：铅行为的实验分析

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Lead attracts large attentions for its applications in Civil Engineering as constitutive element in base isolators. However, the mechanical properties of this material are still not well known. This is due to its typical behavior in testing characterized by the large strain generated (more than 10%), the strain rate dependency, the growth of voids inside the material, the necking after the peak of the stress and the localization of deformations. In this research, tests are performed to collect data for the development of lead constitutive model. The localization of deformations is analyzed by applying the image processing technique, which is improved with respect to previous study as concerning the perspective definition of the material point initial grid, the detailed mesh in the stress concentration area, the increased efficiency and accuracy in calculating the strain field, the new deformation modes for the template used in matching two pictures and the attention to local torsional effect. After the post-processing of the data, the 3D displacement field is visualized and the stress-strain relation is calculated.

机译：铅吸引了其在土木工程中的应用较大的关注作为基本隔离器中的本构型元素。然而，该材料的机械性能仍然不熟知。这是由于其典型的测试表征，其特征在于产生的大应变（超过10％），应变率依赖性，材料内部的空隙的生长，应力峰值之后的缩颈和变形的定位。在该研究中，进行测试以收集铅本构模型的发展数据。通过施加图像处理技术来分析变形的定位，这是关于先前研究的改进，该图像处理技术是关于材料点初始网格的透视定义，在应力集中区域的详细网格，计算的效率增加和准确性应变场，用于模板的新变形模式，用于匹配两张图片和注意局部扭转效果。在数据的后处理之后，可视化3D位移场并且计算应力 - 应变关系。

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《Conference on damping and isolation》|2002年||共11页
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Alessandro Beghini; Masato Abe; Yozo Fujino; Junji Yoshida;
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中图分类材料结构及物理性质;
关键词
lead material testing; lead mechanical properties; perspective effect in optical measurement; image processing; necking of porous material;

机译：铅材料检测;铅机械性能;光学测量的透视效应;图像处理;多孔材料缩放;

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Experimental analysis of lead behavior

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