Abstract：The end bending angles and the middlepoint deflections of eight engineering materials were analyzed by a scanner. The elastic modulus of samples were tested based on compressive rod postbuckling by TA-XT2i Texture Analyzer, and the results of 65Mn steel were compared with those by threepoint bending method. The results show that the deformation behaviors of eight materials are consistent with theoretical calculations, and the errors of middlepoint deflection are below 5％ with the errors of end bending angles below 6％. The experimental results of elastic modulus of metal sheets are all in good agreement with the nominal values, and the method based on compressive rod postbuckling is better than that based on threepoint bending. The proposed method is suitable for measuring elastic modulus of engineering materials. The optimum end bending angle of the method is 20°～25°, and the optimum thickness and length of metal sheets are 0.2～03 mm and 150～180mm, respectively. The optimum length of PVC sheets with thickness of 038mm is 180mm, while the optimum length of PET sheets with thickness of 0.5mm is 80mm. The optimum length and width of art paper are 100mm and 30mm, respectively. The optimum length and thickness of bamboo are 180mm and 1.0mm, respectively.
2014, Vol. 35 
