Elastic constants characterization on graphite at 500℃ by the virtual fields method  

作　　者：Baoqiao Guo Huaixi Wang Huimin Xie Pengwan Chen 

机构地区：[1]State Key Laboratory of Explosion Science and Technology, Beijing Institute of Technology [2]AML, Department of Engineering Mechanics, Tsinghua University

出　　处：《Theoretical & Applied Mechanics Letters》2014年第2期59-65,共7页力学快报（英文版）

基　　金：supported by the National Natural Science Foundation of China(11232008,91216301,11227801,and 11172151);the Tsinghua University Initiative Scientific Research Program,and the Major Basic Research Program of Beijing Institute of Technology(2011CX01030)

摘　　要：In this paper the elastic constants of graphite at elevated temperature were experimentally investigated by using the virtual fields method （VFM）. A new method was presented for the characterization of mechanical properties at elevated temperature. The three-point bending tests were performed on graphite materials by an universal testing machine equipped with heating fumace. Based on the heterogeneous deformation fields measured by the digital image correlation （DIC） technique, the elastic constants were then extracted by using VFM. The measurement results of the elastic constants at 500℃ were obtained. The ef- fect on the experimental results was also analyzed. The successful results verify the feasibility of using the proposed method to measure the properties of graphite at high temperature, and the proposed method is believed to have a good potential for further applications.In this paper the elastic constants of graphite at elevated temperature were experimentally investigated by using the virtual fields method （VFM）. A new method was presented for the characterization of mechanical properties at elevated temperature. The three-point bending tests were performed on graphite materials by an universal testing machine equipped with heating fumace. Based on the heterogeneous deformation fields measured by the digital image correlation （DIC） technique, the elastic constants were then extracted by using VFM. The measurement results of the elastic constants at 500℃ were obtained. The ef- fect on the experimental results was also analyzed. The successful results verify the feasibility of using the proposed method to measure the properties of graphite at high temperature, and the proposed method is believed to have a good potential for further applications.

关 键 词：elastic constants GRAPHITE high temperature digital image correlation virtualfields method 

分 类 号：O343.6[理学—固体力学]