Simulation study on formability of TA1/2A12 composite plates
The bulging test of TA1/2A12 composite plates with different placement sequence was simulated by finite element software Dy-naform.Then,the ultimate bulging height of TA1/2A12 composite plates,the distribution conditions of strain and thinning rate of each layer of plates were analyzed which were verified by bulging test.The simulation results show that when the titanium layer and aluminum layer are placed close to the punch,the ultimate bulging heights are 33.9 and 32.0 mm,respectively.The stress near the bottom of titani-um layer hemisphere is high,and the strain along TD direction is larger.The stress on the aluminum layer is small and evenly distributed,so the ultimate strain is reached firstly at the position of titanium layer near the bottom of hemisphere.Under the bonding effect of compos-ite plates,the strain on the corresponding position of aluminum layer increases until it breaks.The bulging tests show that when the titani-um layer and the aluminum layer are respectively close to the position of punch,the ultimate bulging height is 35.7 and 33.6 mm,respec-tively,and the errors between finite element simulation and test in the ultimate bugling height are 5.3%and 5.0%,respectively.The simulation is in good agreement with the actual fracture situation,and the formability of titanium/aluminum composite plates can be accu-rately predicted by the established finite element model.
Ti/Al composite platesbulgingultimate bulging heightstressthinning ratio
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