| 铝合金材料非均匀表面应力的逐层构建与还原 |
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| 引用本文： | 张晟,廖凯,车兴飞,钟利萍,龚海. 铝合金材料非均匀表面应力的逐层构建与还原[J]. 材料科学与工艺, 2019, 27(6): 12-18 |
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| 作者姓名： | 张晟 廖凯 车兴飞 钟利萍 龚海 |
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| 作者单位： | 中南林业科技大学机电工程学院,长沙410004;中南大学机电工程学院,长沙410083 |
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| 基金项目： | 国家自然科学基金资助项目(51475483)；湖南省重点研发计划资助项目(2018NK2065)；湖南省高校科技创新团队支持计划项目(2014207). |
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| 摘 要： | 铝合金板坯加工后表层应力呈现非均匀性,且强度高、深度浅.本文运用逐层钻孔应力释放-还原机理,通过积分法和逐层钻孔力学模型构建了材料表层加工应力-变形函数,在考虑材料各向异性条件下,用ANSYS仿真计算标定了5阶校准系数矩阵.同时,对加工表面进行逐层钻孔,孔径尺寸1.8 mm、深度20μm,使孔周围应力释放,并测量释放后应变,最后将实验应变值代入函数求得表面应力分布.计算结果表明:在材料表层100μm的深度范围,计算应力与仿真结果、XRD逐层测试结果均吻合较好,其中计算与实验结果偏差小于10 MPa,说明计算模型能较好地还原材料表层非均匀应力分布.
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| 关 键 词： | 铝合金 逐层钻孔法 各向异性 积分法 应力测试 |
| 收稿时间： | 2018-07-15 |
Incremental construction and resuming of processing stresses on Al-based alloy component |
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| ZHANG Sheng,LIAO Kai,CHE Xingfei,ZHONG Liping and GONG Hai. Incremental construction and resuming of processing stresses on Al-based alloy component[J]. Materials Science and Technology, 2019, 27(6): 12-18 |
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| Authors: | ZHANG Sheng LIAO Kai CHE Xingfei ZHONG Liping GONG Hai |
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| Affiliation: | School of Mechanical and Electronic Engineering, Central South University of Forestry and Technology, Changsha 410004, China,School of Mechanical and Electronic Engineering, Central South University of Forestry and Technology, Changsha 410004, China,School of Mechanical and Electronic Engineering, Central South University of Forestry and Technology, Changsha 410004, China,School of Mechanical and Electronic Engineering, Central South University of Forestry and Technology, Changsha 410004, China and School of Mechanical and Electronic Engineering, Central South University, Changsha 410083, China |
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| Abstract: | |
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| Keywords: | Al-based alloy incremental hole-drilling method anisotropy integral method stress measurement |
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