Experimental Material Characterization Of Light Weight Al-structures And Simulation Of Welded Structures In The Automotive Industry

The mechanics simulation of the automobile aluminum alloy automobile body part becomes an important subject, have made a large amount research to the structure of the symmetrical material in domestic-outside in recent years. This paper connects research to the aluminum alloy to this situation:(1) Have carried on research with the welding performance of 5A02 to 6063, mainly including butt joint (TIG welding, laser welding), the T joint (TIG welding ), and adopt ISO equal—strain law to analyze of performance of mechanics;(2) Combining punch shearing test with FEM analyses to test material performance of little section, gets a kind of rational characterizations of weld seam and joint each even regional method of testing of mechanics performance, and adopt finite element simulation to prove in connecting the function test connected correctly;(3)Use ABAQUS business software carry on finite element simulation surrender to deformation and destruction of the Model T structure under the static behavior;(4) Studying the key part of automobile security and weld joint the mechanics performance, get different method of weld joint mechanics performance test and great analysis deformation unite characterizations method , establishing the foundation greatly deformation for further research part.The result of study shows : 1)Welding seam separate law does not consider welding the heat influencing area , but destruction that connects is mostly to happen in the heat influencing area, base material and welding seam simple contact in addition, but two district be restrained each other when effective function, so exist certain limitation to T joint, And punch hole shearing law overcome the defect above , can carry on accurate prediction to the mechanics performance of very small area , thus offer the basis to the fen area that welds the mechanics performance of the material of connecting simulation. 2)Show in T joint finite element simulation static loading when welds of the structure: The deformation of the structure was controlled by the intensity of surrender of the material , and the destruction of the structure wascontrolled with the strain of the material . Result of simulation in addition appear heavy stress gradient is it is it is it weld structure spend a simple one with welding seam to material performance to prove to become to jump very, the heat influencing area is and far from being enough in base material several area, but should make non-linear treatment to the mechanics performance of the material , thus form the changing in succession of performance of materials mechanics. 3)The aluminum alloy has one's own welding performance of determining it of particularity because of itself, it is apt to take shape out of shape that on the whole have, weld the hot crackle , the air vent, it is the problem needing solving to burn the phenomenon, seen from the present TIG of the aluminum alloy has been welded to the aluminum alloy is a kind of riper welding method , and there are very great application prospects in laser welding. So the research of this paper offers the effective basis for the thing that further impact simulation of the automobile part and establishes the foundation...