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鎂合金無(wú)水化學(xué)轉(zhuǎn)化膜表面裂紋行為的計(jì)算機(jī)模擬
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哈爾濱工程大學(xué) 計(jì)算機(jī)學(xué)院,哈爾濱工程大學(xué) 材料科學(xué)與化學(xué)工程學(xué)院 超輕材料與表面技術(shù)教育部重點(diǎn)實(shí)驗(yàn)室 表界面科學(xué)與技術(shù)研究所,哈爾濱工程大學(xué) 材料科學(xué)與化學(xué)工程學(xué)院 超輕材料與表面技術(shù)教育部重點(diǎn)實(shí)驗(yàn)室 表界面科學(xué)與技術(shù)研究所,哈爾濱工程大學(xué) 材料科學(xué)與化學(xué)工程學(xué)院 超輕材料與表面技術(shù)教育部重點(diǎn)實(shí)驗(yàn)室 表界面科學(xué)與技術(shù)研究所,哈爾濱工程大學(xué),哈爾濱工程大學(xué) 材料科學(xué)與化學(xué)工程學(xué)院 超輕材料與表面技術(shù)教育部重點(diǎn)實(shí)驗(yàn)室 表界面科學(xué)與技術(shù)研究所

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基金項(xiàng)目:

國(guó)家自然科學(xué)基金項(xiàng)目（面上項(xiàng)目，重點(diǎn)項(xiàng)目，重大項(xiàng)目）


Computer simulation of surface cracks behavior in anhydrous chemical conversion coatings on magnesium alloy
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Affiliation:

College of Computer Science and Technology,Harbin Engineering University,Institute of Surface/Interface Science and Technology,Key Laboratory of Superlight Material and Surface Technology of Ministry of Education,College of Material Science and Chemical Engineering,Harbin Engineering University,Institute of Surface/Interface Science and Technology,Key Laboratory of Superlight Material and Surface Technology of Ministry of Education,College of Material Science and Chemical Engineering,Harbin Engineering University,Institute of Surface/Interface Science and Technology,Key Laboratory of Superlight Material and Surface Technology of Ministry of Education,College of Material Science and Chemical Engineering,Harbin Engineering University,Institute of Surface/Interface Science and Technology,Key Laboratory of Superlight Material and Surface Technology of Ministry of Education,College of Material Science and Chemical Engineering,Harbin Engineering University,Institute of Surface/Interface Science and Technology,Key Laboratory of Superlight Material and Surface Technology of Ministry of Education,College of Material Science and Chemical Engineering,Harbin Engineering University

Fund Project:

National Natural Science Foundation of China

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    摘要:

    在轉(zhuǎn)化膜中,總是會(huì)出現(xiàn)許多均勻分布的表面裂紋。但是表面裂紋行為很少被研究到,這是由于在實(shí)際的測(cè)試條件下,裂紋很快就萌生完成了。在本文中,借助ABAQUS軟件,采用有限元的研究方法實(shí)現(xiàn)無(wú)水化學(xué)轉(zhuǎn)化膜表面微裂紋行為及內(nèi)應(yīng)力產(chǎn)生的計(jì)算機(jī)模擬,得到Mises應(yīng)力分布、S11應(yīng)力演變和應(yīng)力-時(shí)間曲線。研究結(jié)果表明,轉(zhuǎn)化膜在開(kāi)裂過(guò)程中,內(nèi)應(yīng)力隨著時(shí)間增加而增大,膜片中心處和裂紋邊緣處的應(yīng)力比其他地方都大然而中部區(qū)域的S11應(yīng)力要比靠近邊界區(qū)域的S11應(yīng)力大。裂紋在轉(zhuǎn)化膜膜片之間慢慢產(chǎn)生最終形成V型的裂紋。隨著轉(zhuǎn)化膜膜片收縮角度的不同,相互間的裂紋開(kāi)口寬度也不相同。

    Abstract:

    In the conversion coatings, some uniformly distributed micro surface cracks always occur but the surface cracks behavior is rarely studied due to the frequent initiation in the real test conditions. In this work, computer simulation of micro surface cracks behavior and internal stresses generated in the anhydrous chemical conversion coating was carried out using the finite element method with the help of ABAQUS software. The Mises stress distribution, S11 stress variation, and the stress-time curves are obtained. The results show that the internal stresses generated in the conversion coating increased obviously with increasing time, and the stresses at the center and boundary of coating pieces are bigger than the ones in other areas while the S11 stresses around the center are bigger than the ones near the boundary. The cracks at the interface of coating pieces developed gradually and were as V-type cracks finally. The width of crack mouth opened was different since the contraction degree of each coating piece is different.

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李麗潔,房永超,蔡召兵,崔秀芳,劉二寶,金國(guó).鎂合金無(wú)水化學(xué)轉(zhuǎn)化膜表面裂紋行為的計(jì)算機(jī)模擬[J].稀有金屬材料與工程,2018,47(2):430~435.[Li Lijie, Fang Yongchao, CaiZhaobing, Cui Xiufang, Liu Erbao, Jin Guo. Computer simulation of surface cracks behavior in anhydrous chemical conversion coatings on magnesium alloy[J]. Rare Metal Materials and Engineering,2018,47(2):430~435.]
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歷史
  • 收稿日期:2017-08-07
  • 最后修改日期:2017-09-03
  • 錄用日期:2017-09-12
  • 在線發(fā)布日期: 2018-03-15
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