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
多孔件TC4選區(qū)激光熔化成形及力學(xué)性能分析
DOI:
作者:
作者單位:

重慶大學(xué),重慶大學(xué),重慶大學(xué)

作者簡介:

通訊作者:

中圖分類號:

基金項目:

國家863基金資助(項目號2015AA042501)


Analysis on the formation and mechanical properties of the TC4 porous structures by selective laser melting
Author:
Affiliation:

Chongqing University;China,Chongqing University;China

Fund Project:

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

    采用選區(qū)激光熔化成形技術(shù)制備了兩種鈦合金體心立方多孔結(jié)構(gòu)(BCC和BCC-Z)制件,驗證了其成形復(fù)雜孔制件的可行性；進行了靜態(tài)壓縮試驗,結(jié)果表明制件沿近45°方向斷裂；壓縮試驗應(yīng)力應(yīng)變曲線表明多孔件使材料抗拉強度大大減小,且隨著邊徑比和孔隙率的增大,峰值應(yīng)力減小。同時,在邊徑比和孔隙率相差不大的情況下,BCC-Z結(jié)構(gòu)承受載荷的能力明顯高于BCC結(jié)構(gòu)；通過有限元模擬分析了BCC制件在壓縮過程中的應(yīng)力分布情況,針對單元體節(jié)點處的應(yīng)力集中現(xiàn)象,提出了節(jié)點加固方法。同時預(yù)測了多孔制件的彈性模量和屈服強度,模擬與試驗結(jié)果基本吻合。

    Abstract:

    Two kinds of BCC and BCC-Z Titanium alloy porous structures were manufactured by selective laser melting, and its feasibility of forming complex porous structures was verified. Then, static compression tests were carried out and the results show that the products always fracture around 45 °. The stress strain curve shows that the tensile strength of the porous structures is greatly reduced, and the peak stress is decreased with the increase of the ratio of length diameter and porosity. In addition, in the case of similar ratios of length diameter and porosity, the ability to bear loads of BCC-Z is significantly higher than that of BCC. Finally, the stress distribution of BCC parts in the process of compression was analyzed by finite element simulation. In view of the stress concentration at the nodes of the unit, the method of node reinforcement was put forward. And the elastic modulus and the yield strength of the porous products are predicted, which fits the experiment results.

    參考文獻
    相似文獻
    引證文獻
引用本文

李軍超,臧艷艷,王維.多孔件TC4選區(qū)激光熔化成形及力學(xué)性能分析[J].稀有金屬材料與工程,2018,47(2):662~666.[Li Junchao, Zang Yanyan, Wang Wei. Analysis on the formation and mechanical properties of the TC4 porous structures by selective laser melting[J]. Rare Metal Materials and Engineering,2018,47(2):662~666.]
DOI：[doi]

復(fù)制
文章指標(biāo)
  • 點擊次數(shù):
  • 下載次數(shù):
  • HTML閱讀次數(shù):
  • 引用次數(shù):
歷史
  • 收稿日期:2015-12-16
  • 最后修改日期:2016-05-18
  • 錄用日期:2016-06-12
  • 在線發(fā)布日期: 2018-03-15
  • 出版日期: