High temperature strain measurement of the front edge structure in high thermal environment

During the long time flight in the aerosphere,the hypersonic vehicles’front edge structures are heated badly and affected greatly by thermal stress.Therefore it is necessary to an-alyze the stress field of the front edge structure.The hot structure experiment of hypersonic ve-hicles’front edge was done in the arc heated wind-tunnel.During the experiment high tempera-ture strain was measured using the high temperature strain gages.In this paper,the experimen-tal equipment,the experimental condition,the experimental model and calibration of thermal output are introduced.The experimental data of two kinds of model materials including carbon composite and heat-resistant alloy are analyzed.The computational results verifies the experi-mental data.The temperature of the experimental strain measurement was 600℃.The experi-mental results show that the front edge model’s side flat is in a normal stress state.The results shall be an important reference for structure optimization design.