XLII. The use of plasticine models to simulate the plastic flow of metals.
XLII. The use of plasticine models to simulate the plastic flow of metals.
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四十二．
DOI：
10.1080/14786445108561061
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发表时间：
1951
期刊：
影响因子：
--
通讯作者：
A. P. Green
中科院分区：
文献类型：
--
作者：
A. P. Green
将塑料在永久变形时的行为与理想金属的行为进行了比较，并考察了在二维和三维流动中，两者流型相似的必要条件。简要介绍塑料的机械性能，包括描述在恒定加载速率下在润滑板之间压缩圆柱体所获得的应力-应变曲线。描述了在平行于流动平面的截面上标有网格的塑性模型的平面应变实验，并将变形网格的照片与理论进行了比较。这样研究的过程是：通过正方形和楔形模具挤压；通过单个楔形和一排楔形压入平面表面；以及通过平模压缩窄楔形。文中还给出了平板冲头小压痕后深窄块的轮廓与理论结果的比较。所有这些平面应变塑性实验都与理论吻合良好。进行了一个使用金属的实验--用光滑的平模压缩一个狭窄的铜楔子。这个铜楔的变形方式与塑料楔相似。
The behaviour of plasticine when permanently deformed, is compared with that of an ideal metal, and the necessary conditions for similarity between their flow patterns are examined for flow in two and three dimensions. A brief account of the mechanical properties of plasticine includes a description of stress-strain curves obtained by compressing cylinders between lubricated plates at constant rates of loading. Plane strain experiments, using a plasticine model marked with a grid on a cross-section parallel to the plane of flow, are described, and photographs of the deformed grids are compared with theory. The processes thus examined were : extrusion through square and wedge-shaped dies; indentation of a plane surface by a single wedge and by a row of wedges; and compression of a narrow wedge by a flat die. The profile of a deep narrow block after a small indentation by a flat punch is also compared with theory. All these plane strain plasticine experiments agree well with theory. One experiment using a metal was performed—the compression of a narrow copper wedge by a smooth flat die. This copper wedge deformed in a similar way to the plasticine wedge.