CHARACTER OF STRENGTHENING OF AN INITIALLY ORTHOTROPIC MATERIAL WHEN SUBJECTED TO SIMPLE AND COMPLEX LOADINGS. COMMUNICATION IV: SIMILITUDE OF STRAIN AND STRESS DEVIATORS

摘要

Features are discussed for strain and loading trajectories constructed from experimental data on the biaxial tension of samples of initially anisotropic materials. Materials become transversally isotropic during their complex loading, which is accompanied by partial unloading with strengthening. Noncoincidence observed between the strain and stress trajectories indicates nonfulfillment of hypotheses concerning the similitude of both the strain and stress and strain-increment deviators.