最新色国产精品精品视频,中文字幕日韩一区二区不卡,亚洲有码转帖,夜夜躁日日躁狠狠久久av,中国凸偷窥xxxx自由视频

+高級檢索
單晶γ-TiAl中孔洞尺寸對裂紋擴(kuò)展影響的分子動力學(xué)模擬
DOI:
作者:
作者單位:

蘭州理工大學(xué) 機(jī)電工程學(xué)院,蘭州理工大學(xué) 機(jī)電工程學(xué)院,蘭州理工大學(xué) 機(jī)電工程學(xué)院,蘭州理工大學(xué) 機(jī)電工程學(xué)院,蘭州理工大學(xué) 機(jī)電工程學(xué)院,蘭州理工大學(xué) 機(jī)電工程學(xué)院

作者簡介:

通訊作者:

中圖分類號:

TG146;O77;TG131

基金項(xiàng)目:


Effect of holes size on single crystal γ –TiAl alloy crackpropagation based on molecular dynamics simulation
Author:
Affiliation:

Mechanical and electrical engineering college,Lanzhou University of Technology,Mechanical and electrical engineering college,Lanzhou University of Technology,Mechanical and electrical engineering college,Lanzhou University of Technology,Mechanical and electrical engineering college,Lanzhou University of Technology,Mechanical and electrical engineering college,Lanzhou University of Technology,Mechanical and electrical engineering college,Lanzhou University of Technology

Fund Project:

  • 摘要
    • |
  • 圖/表
    • |
  • 訪問統(tǒng)計(jì)
    • |
  • 參考文獻(xiàn)
    • |
  • 相似文獻(xiàn)
    • |
  • 引證文獻(xiàn)
    • |
  • 資源附件
    • |
  • 文章評論
    摘要:

    運(yùn)用分子動力學(xué)方法研究單晶γ-TiAl合金的裂紋擴(kuò)展行為，模擬時采用嵌入原子勢方法，結(jié)合原子軌跡圖、能量演化圖以及應(yīng)力-應(yīng)變曲線，分析不同孔洞尺寸對裂紋擴(kuò)展過程的影響。結(jié)果表明：隨著孔洞半徑增大，裂紋的啟裂應(yīng)力值減??；裂紋與孔洞結(jié)合后，R=1?時，孔洞變形后在孔洞邊界的中心產(chǎn)生裂紋，沿[100]方向擴(kuò)展至材料斷裂，裂紋擴(kuò)展中出現(xiàn)子母裂紋傳播現(xiàn)象；R=2?時，孔洞變形后在一角處產(chǎn)生裂紋，沿[100]方向擴(kuò)展至材料斷裂；R=3?時，孔洞變形后在兩個角處產(chǎn)生裂紋，沿[110]和 方向擴(kuò)展，[110]方向裂紋擴(kuò)展中出現(xiàn)子母裂紋傳播現(xiàn)象，且邊界產(chǎn)生子裂紋并與該方向裂紋匯合后擴(kuò)展至材料斷裂; 此外孔洞抑制裂紋擴(kuò)展。

    Abstract:

    Molecular dynamics method has been applied to the research on the process of crack propagation of single crystal γ-TiAl. The atomic trajectory figure, energy evolution and the relationship between stress and strain were obtained after the holes size effect had been studied. The results indicate that the initiation stress decreased with holes size increased. After the crack combined with the hole: when R=1?, crack occurred at the center of holes boundary after holes deformation , and it propagated along the direction of [100] until material fracture, mother-child model was found; when R=2?, crack occurred at one corner after holes deformation, and it propagated along the direction of [100] until material fracture; when R=3?, crack occurred at two corners after holes deformation, and it propagated along the direction of [110]and , which mother-child model was found at the direction of [110], and child crack occurred at boundary which combined with crack in this direction and propagate until material fracture. In addition the crack propagate was inhibited by the hole.

    參考文獻(xiàn)
    相似文獻(xiàn)
    引證文獻(xiàn)
引用本文

芮執(zhí)元,曹 卉,羅德春,陳文科,楊利,剡昌鋒.單晶γ-TiAl中孔洞尺寸對裂紋擴(kuò)展影響的分子動力學(xué)模擬[J].稀有金屬材料與工程,2017,46(9):2505~2511.[Rui Zhiyuan, Cao Hui, Luo Dechun, Chen Wenke, Yang Li, Yan Changfeng. Effect of holes size on single crystal γ –TiAl alloy crackpropagation based on molecular dynamics simulation[J]. Rare Metal Materials and Engineering,2017,46(9):2505~2511.]
DOI：[doi]

復(fù)制
文章指標(biāo)
  • 點(diǎn)擊次數(shù):
  • 下載次數(shù):
  • HTML閱讀次數(shù):
  • 引用次數(shù):
歷史
  • 收稿日期:2015-05-07
  • 最后修改日期:2015-09-11
  • 錄用日期:2015-10-13
  • 在線發(fā)布日期: 2017-11-29
  • 出版日期: