Abstract
The resolution of the components of strength tensors derived from experimental data is discussed. It is shown that the variations in the non- interaction components are independent of the tension-compression strength ratios and magnitudes and their relative scatter can be related directly to the scatter in the engineering strength. The variation in the interaction component F 12, is dependent on both the magnitude of the biaxial strength and the magnitude of F 12; it has no well defined relative scatter and only its absolute resolution can be determined from experi mental scatter. Optimal experiments for F 12 using tubular specimens are discussed. Optimal biaxial stress ratios using compression-internal pressure and tension-torsion tests are discussed and experimentally demonstrated.
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