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de Koning, A.U. (author)In this report strain ajid displacwnent measurements are described for a uniaxially loaded strip with a central rovind hole. The experiments are carried out in the elastio-plastic domain of the material. The strains and displacements are measured with use of respectively strain gauges and inductive displacement transducers. The test data...report 1973
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de Koning, A.U. (author)In this report a model is presented for anisotropic hardening in continued plastic deformation of materials exhibiting anisotropy due to initial permanent strains. - Isotropic material behaviour is assumed for all elastic deformations. However, the permanent strains give rise to anisotropy with respect to subseqfuent yielding. - The plastic...report 1972