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摘要通过对高强铝合金多层结构整体钎焊原理的研究，利用ADINA有限元分析软件建立了高强铝合金整体钎焊过程温度场和应力及应变的有限元分析模型。本试验针对高强铝合金多层结构模型钎焊温度场和应力及应变进行数值模拟。在高强铝合金多层结构整钎焊接数值模拟过程中，得出了高强铝合金的瞬态温度场分布以及应力和应变的情况，模拟结果能够正确地反映出高强铝合金多层结构模型钎焊过程中的温度分布、变化规律、应力和应变的趋势。试验可得，高强铝合金多层结构模型的温度呈层状分布，夹具的数量和位置对于温度场基本没有影响，但是显著的影响了应力和应变的趋势。高强铝合金多层结构模型的焊缝区和热影响区的温度差别并不大，试验的数据都表明二者在加热阶段温差最大，但是保温阶段温差最小。23423
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关键词 高强铝合金 多层结构 钎焊 数值模拟 温度场 应力和应变
毕业设计说明书（毕业论文）外文摘要
Title Multilayer structure high-strength aluminum alloy brazing process numerical simulation research as a whole
Abstract
Based on multi-layer high-strength aluminum alloy structure overall brazing principle research,high strength aluminum alloy was established based on scaled fem software adina.the whole temperature field and stress-strain finite element analysis model of the brazing process.This test for high strength aluminum alloy brazing multilayer structure model for numerical simulation of temperature field and stress-strain .Multilayer structure in high strength aluminum alloy entire braze welding numerical simulation process, the transient temperature field and stress-strain distribution of high strength aluminum alloy is obtained, the simulation results can accurately reflect the multi-layer high-strength aluminum alloy structure model of the temperature distribution and change law in the process of soldering.Test, the temperature high strength aluminum alloy multi layered structure model of the distribution, number and location of fixtures basically no effect on the temperature field, but a significant impact on the trend of the stress-strain.ulti-layer structure model of high strength aluminum alloy weld zone and heat-affected zone temperature difference is not big, experiment data show that both the temperature maximum during the heating phase, but the heat preservation stage temperature difference is minimal.
Keywords high strength aluminum alloy multilayered structure brazing the numerical simulation the temperature field stress-strain
目 次
1 绪论 2
1.1 课题背景与意义 2
1.1.1 课题背景 3
1.1.2 课题意义 3
1.2 铝及铝合金研究现状 3
1.3 铝及合金焊接方研究钎焊 3
1.3.1 铝及铝合金的焊接方法 3
1.3.2 铝及铝合金的焊接特点 4
1.4 铝合金的真空钎焊 4
1.4.1 铝合金的真空钎焊原理 5
1.4.2 铝合金的真空钎焊方法 5
1.4.3 铝合金的真空钎焊方法 5
1.4.4 影响铝及铝合金钎焊质量的关键因素 5
1.5 有限元方法的发展概况 6
1.5.1 有限元方法的特点 6
1.5.2 有限元软件ANSYS和ADINA的简介 6