Abstract
In order to investigate the elastic properties of brittle material, various splitting tests and flexural test of mortal were performed. During the tests, strain was measured by the strain gauge. Flexural tests by central loading were carried out for prism and rectangular plate. Splitting tests were performed for cylinder, disc and beam specimens of prism and rectangular plate. Following results were obtained by tests and considerations based on the theory of elasticity. Straight stress-strain relations in test pieces were obtained at the center of splitting test and the center of lower face of flexural test. In order to evaluate Poisson's ratio and Young's modulus of test piece, it was required to distinguish the plane stress from the plane strain. Tensile strength observed by splitting test was greatly affected by contact width between test piece and loading platen. Reason of such phenomenon was resulted from the difference of the distribution of tensile strain in the vicinity of the loading part. Reason of difference between tensile strength by splitting test and modulus of rupture was interpreted from the maximum strain theory. Tensile strength by splitting test and compressive strength of rectangular block were almost same as those of cylinder.
