异厚板铝合金搅拌摩擦焊的温度场模拟

ABSTRACTIn this paper,the temperature field distribution of aluminum alloy with differentthickness was studied by ABAQUS finite element software.Several groups ofdifferent welding parameters were set to analyze the temperature variation rule anddraw the temperature variation curve.Finally,the temperature variation of the plateswith different thickness was summarized.Firstly,the corresponding finite element model of the aluminum alloy with differentthickness is established,and on this basis,the temperature field generated during theprocess of friction stir welding is numerically analyzed.In addition,the temperaturechanges in two different directions were studied.The two directions were along thedirection of the weld and perpendicular to the weld.In addition,the temperaturegradient changes along the center distance of the weld are studied in detail,and thetemperature changes on the forward side and the backward side are compared.Usingdifferent welding process parameters (including stirring head rotation speed andwelding speed),friction stir welding of aluminum alloy with different thickness wascarried out,and the variation law of temperature field during the welding process wasanalyzed.The results show that the different plate on both sides of weld temperature fielddistribution is asymmetrical elliptical.Due to the different thickness of the two plates,the temperature field on both sides of the weld is different.Along the thicknessdirection,the temperature field is distributed in an asymmetric "bowl shape".With theincrease of the rotating speed of the pin tool,the maximum temperature of thewelding plate will also increase.As the welding speed increases,the maximumtemperature of the welding plate in the forward direction will increase,and themaximum temperature of the welding plate in the backward direction will decrease.KEYWORDS:friction stir welding;aluminum alloy;Different thick plates;thetemperature field;ABAQUS