The Numerical Simulation Of The Bimetal Forming Process

Bimetal composite sheet has special mechanical and physical performances, which can supply the industry needs, so it is necessary to make research on it. This article analyzes the solid phase bonding mechanism and main factor influencing bond strength. And relying on this, our laboratory proposes a new cladding method.By means of large dynamic explicit FEM code ANSYS/LS-DYNA, the numerical simulation was carried out in bimetal forming process. During the simulation of the forming process, the large deformation of the strip should be considered, as well as geometrical and material nonlinear, the contact between the roller and the strip, the contact between two metal sheets and the load .As for these problems, we can use node to surface contact and relative parameters, BISO model is introduced, the load is applied as array. Moreover, to make it more visualized, the result is processed in LSPOST.Through the simulation of the forming process, we can get the deformations, stress, strain, plastic flowing in sheets and the interface state under impact load and rolling load, the deformation of the sawtooth form and comparing to the initial state, the results above are expressed in computer animated way. And the effect of geometrical(mainly different form, including 90 degree, isoceles triangle,75 degree, and 1.5 high and wide),material and technical parameters on the bond strength are analyzed, also including the comparison of different sawtooth form . The optimum parameters are got. The feasibility of above method in simulating bimetal forming is proved.