J. Cirne, R. Dormeval, et al.
J. Phys. IV France 134 (2006) 577-582
Real-time measurement on deformation fields of hole-excavated samples under impact tensionSiying Chen1, Chenguang Huang2 and Guoqiang Ni1
1 Department of Optoelectronic Engineering, Beijing Institute of Technology, Beijing 100081, China
2 Department of Engineering Sciences, Institute of Mechanics, Chinese Academy of Sciences, Beijing 100080, China
Published online: 26 July 2006
In this paper, the real-time deformation fields are observed in two different kinds of hole-excavated dog-bone samples loaded by an SHTB, including single hole sample and dual holes sample with the aperture size of 0.8 mm. The testing system consists of a high-speed camera, a He-Ne laser, a frame grabber and a synchronization device with the controlling accuracy of 1 microsecond. Both the single hole expanding process and the interaction of the two holes are recorded with the time interval of 10 s. The observed images on the sample surface are analyzed by newly developed software based on digital correlation theory and a modified image processing method. The 2-D displacement fields in plane are obtained with a resolution of 50 m and an accuracy of 0.5 m. Experimental results obtained in this paper are proofed, by compared with FEM numerical simulations.
© EDP Sciences 2006