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首页> 外文会议>IUTAM Symposium on Multiscale Modelling of Damage and Fracture Processes in Composite Materials; 20050523-27; Dolny(PL) >THE MACROSCOPIC STRENGTH OF PERFORATED STEEL DISKS AT MAXIMUM ELASTIC AND LIMIT STATE
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THE MACROSCOPIC STRENGTH OF PERFORATED STEEL DISKS AT MAXIMUM ELASTIC AND LIMIT STATE

机译：渗透钢盘在最大弹性和极限状态下的宏观强度

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摘要

This paper describes a study aiming to define, for a perforated steel disk, a macroscopic elastic or yield surface depending on the properties of the perforation. Such plates can be considered as made of a damaged or composite material prepared with "holes" and isotropic metal. Some cellular areas are isolated inside the considered disk and are studied at the ultimate elastic or yield limit state using the finite element method and appropriate boundary conditions. Limit elastic or yield curves are sproduced for an equivalent anisotropic or isotropic material. Square and triangular equilateral patterns are considered. The accuracy of the approach is directly verified by comparison of theoretical yield surfaces with two dimensional experiments. It is also indirectly proved by comparison of predictions of elasto-plastic behaviour of "homogenised" circular plates with experimental data from tests on real perforated plates. This last comparison shows the interest of the approach for the design of mechanical equipments such as heat exchangers.
机译：本文介绍了一项研究，旨在根据穿孔的特性为穿孔的钢盘定义宏观的弹性或屈服表面。这样的板可以认为是由损坏的或由“孔”和各向同性金属制成的复合材料制成的。某些孔区域在考虑的圆盘内部隔离，并使用有限元方法和适当的边界条件在极限弹性或屈服极限状态下进行研究。对于等效的各向异性或各向同性材料，将生成极限弹性或屈服曲线。考虑正方形和三角形等边图案。通过将理论屈服面与二维实验进行比较，可以直接验证该方法的准确性。通过将“均质”圆形板的弹塑性行为预测与实际穿孔板上的试验数据进行比较，也间接证明了这一点。最后的比较显示了这种方法对设计机械设备（如热交换器）的兴趣。

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