Shear modulus and corner limit crack stress of matured pod corner for Youli6, Zaoshu420, and Xiangzayou1613 was measured by using microcomputer controlled universal material testing machine, torsion testing machine, and the static digital strain gauge. The rape pod is simplified as isotropic linear elastic material. The elastic modulus and poisson's ratio was measured by the tensile test to determine the shear modulus. Two principal strains at the corner cracking were measured by torsion combined with electrical strain test. Using plane strain theory, the limit shear strain at the corner cracking was obtained to calculate the limit shear stress. The results showed that the water content of rape was 8%–10% in the matured period. The shear modulus of Youli6 was about 116 MPa, and the limit stress at corner cracking was 0.180 MPa. The shear modulus of Zaoshu420 and Xiangzayou1613 was 137 MPa and 142 MPa, and the limit stress at corner cracking was 0.213 MPa and 0.221 MPa, respectively.