1977 年 25 巻 285 号 p. 481-487
Semi-microscopic thermal residual stress state in the unidirectional fiber-reinforced composites is experimentally and theoretically investigated. Photo-elastic experiments without external loads are conducted for a plate specimen containing some inclusions like a coin. Temperature dependent properties of the matrix are measured. Because the specimen to be analyzed is such a plate, the constitutive equations should be modified for the plane stress problem. The solution procedure is identical with the one used consistently by the authors. Calculated results based on the temperature dependent matrix properties are in very good agreements with the experimental results except for the areas near the fiber-matrix interface. Estimating calculations of the stress levels in the ordinal unidirectional CFRP are also executed as the first step of the elucidation of the failure behavior.