Numerical simulation of explosive welding of aluminum/stainless steel bimetallic tubes
Taking aluminum/stainless steel metal pipes as the research object,the explosive welding process is simulated by ANSYS/LS-DYNA finite element software combined with SPH-FEM coupling algorithm and Lagrange algorithm.The influence of explosive detonation velocity on the bonding quality of composite pipe is studied.The results show that the explosive detonation velocity has a great influence on the plastic deformation and the impact velocity of the base clad tube,the plastic deformation and the impact velocity of the clad tube cannot achieve a good combination if they are too small or too large;When the detonation velocity of the explosive is about 1 950 m/s to 2 150 m/s,the bonding quality of the base tube is good,which is consistent with the conclusion obtained from the experiment;The early modeling of Lagrange algorithm is relatively simple,and the SPH-FEM coupling algorithm takes more time in the simulation process;The collision velocity measured by the Lagrange algorithm has a large error with the theoretical calculation value,and the SPH-FEM coupling algorithm can better deal with the high-speed explosive impact problem.
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