Abstract The in-plane torsion test offers a broad range of applications for the characterization of mechanical properties of sheet metal materials and components. True plastic strains beyond 1.0 can be achieved. Such data can be used for the numerical analysis without extrapolation of the flow curve. The stress and strain state correspond to truely ideal simple shear during the entire process. The full-field strain and stress analysis of the test area makes it possible to determine an almost arbitrary number of cyclic flow curves with only one single specimen. By using a grooved specimen, the ideal simple shear state can be obtained until fracture of the material without loosing the shear state. New investigations show that the in-plane torsion test is also suitable for the determination of flow curves of sheets with curved surfaces. Investigations on curved rotationally symmetrical as well as a tubular shape sheets were performed. Finally, first results for the determination of the local strength at arbitrary positions of a sheet component are presented.

中文翻译：

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使用面内扭转测试对平面和曲面片材进行材料表征 - 概述

摘要 面内扭转试验为表征钣金材料和部件的机械性能提供了广泛的应用。可以实现超过 1.0 的真实塑性应变。此类数据可用于数值分析，无需外推流量曲线。在整个过程中，应力和应变状态对应于真正理想的简单剪切。测试区域的全场应变和应力分析使得仅用一个样品就可以确定几乎任意数量的循环流动曲线。通过使用带凹槽的试样，可以获得理想的简单剪切状态，直到材料断裂而不会失去剪切状态。新的研究表明，面内扭转试验也适用于确定曲面片材的流动曲线。对弯曲的旋转对称以及管状片材进行了研究。最后，给出了确定板材部件任意位置的局部强度的第一个结果。