EXPERIMENTAL STUDY ON CRACK GROWTH RATE OF B780CF STEEL WELDED JOINTS UNDER DIFFERENT WELDING PROCESS

SHENG ShouYong; WANG ShiYue; LIU GuoShou; ZHENG YiHua

doi:10.16579/j.issn.1001.9669.2018.05.024

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EXPERIMENTAL STUDY ON CRACK GROWTH RATE OF B780CF STEEL WELDED JOINTS UNDER DIFFERENT WELDING PROCESS

更新时间：2022-09-22

- EXPERIMENTAL STUDY ON CRACK GROWTH RATE OF B780CF STEEL WELDED JOINTS UNDER DIFFERENT WELDING PROCESS
- Journal of Mechanical Strength Vol. 40, Issue 5, Pages: 1167-1170(2018)
- 作者机构：
  
  1. 昆明理工大学建筑工程学院
- 作者简介：
- 基金信息：
- DOI：10.16579/j.issn.1001.9669.2018.05.024
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SHENG ShouYong, WANG ShiYue, LIU GuoShou, et al. EXPERIMENTAL STUDY ON CRACK GROWTH RATE OF B780CF STEEL WELDED JOINTS UNDER DIFFERENT WELDING PROCESS. [J]. 40(5):1167-1170(2018)
DOI：

SHENG ShouYong, WANG ShiYue, LIU GuoShou, et al. EXPERIMENTAL STUDY ON CRACK GROWTH RATE OF B780CF STEEL WELDED JOINTS UNDER DIFFERENT WELDING PROCESS. [J]. 40(5):1167-1170(2018) DOI： 10.16579/j.issn.1001.9669.2018.05.024.

摘要

采用标准紧凑拉伸试样进行不同焊接工艺下的疲劳裂纹扩展速率试验,使用递增多项式法对试验数据进行处理,得到裂纹扩展速率曲线。分析焊接工艺对疲劳寿命和裂纹扩展速率的影响,结果表明:不同的焊接工艺下,疲劳裂纹扩展速率是有明显区别的,按母材、埋弧焊、热影响区、手工焊的顺序递减。同时对不同焊接工艺下的疲劳断口进行了分析,探讨焊接工艺对裂纹扩展速率的影响机理。

Abstract

The fatigue crack growth rate under different welding process was tested with standard compact tension specimen,the test data are processed by using incremental polynomial method and the crack growth rate curve under different welding process was obtained. The effect of different welding process on the crack growth rate was analyzed,the result show under the condition of the same crack length,the influence on fatigue life N,base material life < submerged arc welding life < heat affected zone life < manual welding life. and the fatigue fracture under welding process was analyzed,the mechanism of the crack growth rate under different welding process was discussed.

关键词

递增多项式裂纹扩展速率焊接工艺疲劳断口

Keywords

Incremental polynomial methodCrack growth rateWelding processFatigue fracture

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