Finite Element Simulation And Control Of Aluminum Alloy Rolling Porosity Loose Defect

4004aluminum alloy with low melting point, good fluidity, certain strength, isoften used in the manufacture of aluminum alloy welding materials and widely usedin air conditioners, oxygen machine, automobile radiator manufacturing. However,incasting time4004aluminum alloy easily absorbs hydrogen, then producing theporosity, loose defects, porosity defects in rolling process, will cause such problemsas plate edge crack and fault phenomena in production, molding products of poorquality and low rate of finished products. The current domestic productiontechnology which mainly relies on site testing and experience to guide the productionalso cannot solve this problem. This paper makes a numerical simulation of theporosity and loose evolution behavior in the aluminum alloy rolling, with theapplication of the finite element analysis software ABAQUS based on GTNmicro-mechanics damage theory.In this paper, the main research work is by ABAQUS finite element analysissoftware and finite element analysis method for the determination of GTNmicro-damage model parameters are utilized to determinate4004aluminum alloy onthe mechanical properties of the material. And finite element model of rolling isestablished using the measured parameters of4004cold rolled sheet; The finiteelement model of4004aluminum alloy rolling hole and osteoporosis is establishedto study the distribution of the porosity, loose defect and the evolution of size andshape in the process of rolling. The corresponding data and conclusion is providedfor theoretical research through the analysis of porosity, loose defect shape on sheetproperties of rolling defects; Simulate the effects of porosity, loose defects of sheetforming quality in the different conditions: single pass reduction of10%and15%;Analysis rolling edge crack defect of the accumulated pass reduction which isgenerated in different single pass reduction; Study finished rate to develop the optimization of rolling process when rolling defects are produced on the cumulativepass reduction. Field test shows that GTN micro-damage model is accurate in theapplication of rolling plastic processing and broadens the GTN damage theory inmetal plastic forming and its application. And it verifies the Validation of differentsingle pass reduction and cumulative pass reduction of rolling defects in the finiteelement simulation. The actual machining parameters that are optimized are obtainedby experiments, which provide the corresponding empirical data to the actualproduction.