摘要
The effect of thermally activated energy on the dislocationemission from a crack tip in BCC metal Mo is simulated in this paper.Based on the correlative reference model on which the flexi- bledisplacement boundary scheme is introduced naturally, the simulationshows that as temperature in creases the critical stress intensityfactor for the first dislocation emission will decrease and the totalnumber of emitted dislocations increase for the same external load.The dislocation velocity and exten- sive distance among partialdislocations are not sensitive to temperature.
The effect of thermally activated energy on the dislocationemission from a crack tip in BCC metal Mo is simulated in this paper.Based on the correlative reference model on which the flexi- bledisplacement boundary scheme is introduced naturally, the simulationshows that as temperature in creases the critical stress intensityfactor for the first dislocation emission will decrease and the totalnumber of emitted dislocations increase for the same external load.The dislocation velocity and exten- sive distance among partialdislocations are not sensitive to temperature.
基金
the National Natural Science Foundation of China
