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Study of Deformation and Defects Occurrence in Advanced Forging Techniques.
Technical rept. Jan-Sep 71,
CALIFORNIA UNIV BERKELEY
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The report consists of two parts. In the first part, the detailed mechanics of flat-punch indentation into specimens of finite dimensions under plane-strain conditions were obtained, based on the observed flow patterns of commercially pure, hard copper specimens. In the second part, Hills analysis for compression of a long rectangular strip was modified so that the analysis is applicable to compression of a rectangular block having any length-width ratio. The predictions were compared with experimental results obtained with annealed pure aluminum in terms of load-displacement relationships, changes in specimen geometry, flow lines and grid distortions. Also, a comparison was made for the load-displacement curves by the modified analysis and by the sand-heap analogy. Author
APPROVED FOR PUBLIC RELEASE