Application of visioplasticity to an experimental analysis of the shearing phenomenon

Nobuhiro Koga; Takeshi Kudoh; Masao Murakawa

doi:10.1117/12.49483

1 December 1991 Application of visioplasticity to an experimental analysis of the shearing phenomenon

Nobuhiro Koga, Takeshi Kudoh, Masao Murakawa

Proceedings Volume 1554, Second International Conference on Photomechanics and Speckle Metrology; (1991) https://doi.org/10.1117/12.49483
Event: San Diego, '91, 1991, San Diego, CA, United States

Abstract

When an experimental analysis on the shearing phenomenon, including large strain and stress which arise concentrated in a narrow region, is conducted using the conventional grid method, there are problems such as difficulty in obtaining accurate results due to grid lines subjected to large deformation, or in a worst case, impossibility in reading the coordinate values of grid pattern intersections, leading to a total failure of the analysis itself. Therefore, in order to solve such problems, the authors propose the remeshing visioplasticity method. This method has proved that an experimental analysis of the entire stress and strain in a shearing area, which has not been successful so far either theoretically or experimentally, can be possible. The results show, for example, that just before cracks are formed in a shearing deformation area, contour lines of a large increment of maximum shearing strain appear parallel to the line connecting respective cutting edges of a punch and a die, and also that the hydrostatic pressure values in its vicinity decrease (approaching a tensile level).

Citation Download Citation

Nobuhiro Koga, Takeshi Kudoh, and Masao Murakawa "Application of visioplasticity to an experimental analysis of the shearing phenomenon", Proc. SPIE 1554, Second International Conference on Photomechanics and Speckle Metrology, (1 December 1991); https://doi.org/10.1117/12.49483

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