Evaluation of Weld Quality and Strength of Ship Structures made of Thermo-Mechanical Controlled Process Steels
热机械控制工艺钢船舶结构的焊接质量和强度评价
基本信息
- 批准号:60302053
- 负责人:
- 金额:$ 4.29万
- 依托单位:
- 依托单位国家:日本
- 项目类别:Grant-in-Aid for Co-operative Research (A)
- 财政年份:1985
- 资助国家:日本
- 起止时间:1985 至 1986
- 项目状态:已结题
- 来源:
- 关键词:
项目摘要
Concerning widespread use of newly developed thermo-mechanical controlled process steels for ship hull structures, some related problems with weld quality and strength of ship hull structures are investigated. Solidification cracking experiments for three kinds of this type of steels are conducted using the Trans-Varestraint test.In order to estimate critical strain rate for temperature drop within the brittle temperature range, a thermal elasto-plastic analysis is performed based on the boundary element method. Calculated results of the critical strain rate at the center of weld metal in the first pass of butt-welded joints are well agreement with the experimental values and the growth mechanism of this sort of solidification cracking is elucidated in some degree. Effects of softening due to large heat input welding on the fatigue and bending strengths of the welded joints are also examined experimentally.In connection with the brittle fracture of ship structures, an experimental method to evaluate crack-tip opening displacement of surface notches such as weld flaws is proposed. As a matter of interest along with the thinner shell structures due to enlarging use of the higher strength steels, analytical and experimental studies are made to prevent ship hull vibration as well as buckling and collapse failures of thin shell structures subjected to large deflection.
针对新型热机械控制工艺钢在船舶船体结构中的广泛应用,对与船舶船体结构焊接质量和强度有关的问题进行了研究。采用Trans-Varestraint试验对3种钢进行了凝固开裂试验,并采用边界元法对试验钢进行了热弹塑性分析,以确定脆性温度范围内的临界温降应变速率。计算得到的对接接头第一道次焊缝金属中心处的临界应变速率与实验值吻合较好,并在一定程度上阐明了这种凝固裂纹的扩展机理。本文还研究了大线能量焊接软化对焊接接头疲劳和弯曲强度的影响,并针对船体结构的脆性断裂,提出了一种估算表面缺口(如焊接缺陷)裂纹尖端张开位移的实验方法。沿着高强度钢的广泛应用,薄壳结构的应用越来越广泛,本文对防止船体振动以及薄壳结构在大挠度作用下的屈曲和倒塌进行了理论分析和试验研究。
项目成果
期刊论文数量(6)
专著数量(0)
科研奖励数量(0)
会议论文数量(0)
专利数量(0)
福地信義: 西部造船会会報. 72号. 49-58 (1961)
Nobuyoshi Fukuchi:西方造船师协会公报,第 72. 49-58 (1961)。
- DOI:
- 发表时间:
- 期刊:
- 影响因子:0
- 作者:
- 通讯作者:
I. TSUJI: "Elasto-Plastic Thermal Stress Analysis by the Boundary Element Method" Transactions of The West-Japan Society of Naval Architects. No.72. 35-47 (1961)
I. TSUJI:“用边界元法进行弹塑性热应力分析”西日本造船学会会刊。
- DOI:
- 发表时间:
- 期刊:
- 影响因子:0
- 作者:
- 通讯作者:
辻勇: 西部造船会会報. 72号. 35-47 (1961)
Isamu Tsuji:西方造船师协会公报,第 72. 35-47 号(1961 年)。
- DOI:
- 发表时间:
- 期刊:
- 影响因子:0
- 作者:
- 通讯作者:
N. FUKUCHI: "Nonlinear Behaviour of Shell Structure Subjected to Large Deflection Part 1. Elasto-Plastic Analysis of Shallow Shell by the Finite Strip Method" Transactions of The West-Japan Society of Naval Architects. No.72. 49-58 (1961)
N. FUKUCHI:“大变形下壳结构的非线性行为第 1 部分。采用有限条带法对浅壳进行弹塑性分析”西日本造船学会会刊。
- DOI:
- 发表时间:
- 期刊:
- 影响因子:0
- 作者:
- 通讯作者:
{{
item.title }}
{{ item.translation_title }}
- DOI:
{{ item.doi }} - 发表时间:
{{ item.publish_year }} - 期刊:
- 影响因子:{{ item.factor }}
- 作者:
{{ item.authors }} - 通讯作者:
{{ item.author }}
数据更新时间:{{ journalArticles.updateTime }}
{{ item.title }}
- 作者:
{{ item.author }}
数据更新时间:{{ monograph.updateTime }}
{{ item.title }}
- 作者:
{{ item.author }}
数据更新时间:{{ sciAawards.updateTime }}
{{ item.title }}
- 作者:
{{ item.author }}
数据更新时间:{{ conferencePapers.updateTime }}
{{ item.title }}
- 作者:
{{ item.author }}
数据更新时间:{{ patent.updateTime }}
TSUJI Isamu其他文献
TSUJI Isamu的其他文献
{{
item.title }}
{{ item.translation_title }}
- DOI:
{{ item.doi }} - 发表时间:
{{ item.publish_year }} - 期刊:
- 影响因子:{{ item.factor }}
- 作者:
{{ item.authors }} - 通讯作者:
{{ item.author }}
{{ truncateString('TSUJI Isamu', 18)}}的其他基金
A Study on Rationalization of Line Heating Process by Oxy-acetylene Flame for Plate Bending of Ship Steels
船舶钢板材弯曲氧乙炔火焰线加热工艺合理化研究
- 批准号:
61550315 - 财政年份:1986
- 资助金额:
$ 4.29万 - 项目类别:
Grant-in-Aid for General Scientific Research (C)