Progress rept. no. 2, 1 Jun-30 Sep 64,
CALIFORNIA UNIV BERKELEY METAL PROCESSING LAB
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Progress is reported on the application of visioplasticity to the complete solution of a certain class of forming problems. This method has as its aim the establishment of a real velocity field in an actual forming operation, as for example in rolling and extrusion, without any assumption whatsoever. Hence, only experimental errors will limit the accuracy of a flow field. Methods presently employed indicate that these errors can be kept to an acceptable minimum and that it will be possible to calculate strain rates and finite strains from the experimentally determined flow field without additional assumptions. Stresses and loads can be calculated afterwards by introducing the strain and strain rates into the plasticity equations, yield condition, and equilibrium equations under the assumption that the flow stress as function of strain and strain rate is available.