黒鉛の応力-歪関係の研究 (II)

抄録

The stress-strain relationships in tension were studied, by using several kinds of commercial graphite. These stress-strain relationships satisfy the empirical formula previously proposed by the authors in the case of compression.
It has been found, however, that both the static modulus of elasticity and the decrease ratio of the apparent modulus are different from those in the case of compression.
The discrepancy between the experimental results and the empirical formula at very low stress is considered to be attributable to the existence of residual stress.
The stress-strain relationships under cyclic tension were also measured, and the relationships between maximum stress and residual strain in such cases were studied.