【摘要】：根據(jù)攪拌摩擦焊特點(diǎn)及庫倫摩擦做功理論,以厚度為6 mm的7075-T7351鋁合金板材為研究對(duì)象,基于ANSYS有限元軟件,建立了攪拌摩擦焊雙熱源三維有限元模型,研究不同轉(zhuǎn)速、焊接速度對(duì)溫度場(chǎng)及殘余應(yīng)力場(chǎng)的影響規(guī)律.結(jié)果表明,焊接過程峰值溫度在500℃左右,接頭最高溫度出現(xiàn)在攪拌頭后部大約5 mm處;接頭殘余應(yīng)力以縱向殘余應(yīng)力為主,在垂直焊縫方向上呈M形分布,最大值約為150 MPa;當(dāng)攪拌頭轉(zhuǎn)速一定時(shí),隨著焊接速度的增大,峰值溫度減小,峰值縱向殘余應(yīng)力增大;當(dāng)焊接速度一定時(shí),溫度隨著轉(zhuǎn)速的增大而增大,且轉(zhuǎn)速越大,縱向殘余應(yīng)力分布越均勻.
[Abstract]:According to the characteristics of friction stir welding and Coulomb's theory of friction work, taking 7075-T7351 aluminum alloy sheet with thickness of 6 mm as the research object, based on ANSYS finite element software, a three-dimensional finite element model of double heat source for friction stir welding is established, and different rotational speeds are studied. The influence of welding speed on temperature field and residual stress field. The results show that the peak temperature of welding process is about 500 鈩，

本文編號(hào)：2221061