Computational weld mechanics
计算焊接力学
基本信息
- 批准号:2922-2010
- 负责人:
- 金额:$ 2.04万
- 依托单位:
- 依托单位国家:加拿大
- 项目类别:Discovery Grants Program - Individual
- 财政年份:2014
- 资助国家:加拿大
- 起止时间:2014-01-01 至 2015-12-31
- 项目状态:已结题
- 来源:
- 关键词:
项目摘要
In many in-situ weld repairs in thermal and nuclear power plants, petro-chemical and tar sands plants, the application of an elevated temperature post-weld heat treatment to reduce the hardness of the weld to acceptable levels is difficult and/or expensive. In those circumstances, the ASME Boiler and Pressure Vessel Code recommends the `half-bead' weld technique in which half of the filler metal deposited in each weld pass is removed by grinding before applying the next weld pass. A properly designed temper bead weld procedure can eliminate the very expensive grinding step of the half-bead weld technique. Performing the tests needed to qualifying a temper bead weld procedure can be expensive. The first objective of this proposal is to develop a computational model to automate the design of an optimal temper bead weld procedure for a given weld repair problem. The model will compute the transient temperatures and the evolution of the microstructure during welding and final hardness distribution for essentially all feasible variations of the welding process and then choose the optimal design and report the performance. The intent is to try to reduce the number of tests required to qualify the procedure to one. A second objective of this proposal is to automate the design of welding procedures to minimize the risk of hot cracking in welding austenitic stainless steels that are susceptible to hot cracking. Hot cracking in welds is a serious limitation in welding many stainless steel alloys used in applications that must resist corrosion and/or high temperatures. We propose to develop a holistic 3D transient model of hot cracking in welds that will couple our existing transient thermal analysis using an Ohji weld pool model with our existing synthetic microstructure evolution (but will add a phase field model with segregation and solute diffusion) with our existing transient thermo-visco-elasto-plastic stress and strain and strain-rate distribution model. It will also add single crystal plasticity. These models will reduce costs and improve the quality and reliability of welded structures.
在许多热电厂、核电站、石油化工和沥青砂厂的现场焊接修复中,应用高温焊后热处理将焊缝硬度降低到可接受的水平是困难的,而且/或昂贵的。在这种情况下,ASME锅炉和压力容器规范建议采用“半焊头”焊接技术,即在应用下一个焊道之前,通过研磨去除沉积在每个焊道中的一半填充金属。设计合理的回火焊工艺可以消除半焊工艺中昂贵的磨削工序。执行验证回火焊程序所需的测试可能是昂贵的。本提案的第一个目标是开发一个计算模型,以自动设计最佳回火焊工艺,以解决给定的焊缝修复问题。该模型将计算焊接过程中的瞬态温度和微观组织的演变,以及焊接过程中几乎所有可行变化的最终硬度分布,然后选择最佳设计并报告性能。这样做的目的是试图将使该程序合格所需的测试次数减少到一次。本提案的第二个目标是使焊接程序的设计自动化,以最大限度地减少焊接易受热裂影响的奥氏体不锈钢的热裂风险。焊接中的热裂是焊接许多不锈钢合金时的一个严重限制,这些不锈钢合金用于必须耐腐蚀和/或高温的应用中。我们建议开发一个完整的焊接热裂三维瞬态模型,该模型将现有的瞬态热分析(使用Ohji焊接池模型)与现有的合成显微组织演变(但将添加一个具有偏析和溶质扩散的相场模型)与现有的瞬态热粘弹塑性应力应变和应变率分布模型相结合。它还会增加单晶的可塑性。这些模型将降低成本,提高焊接结构的质量和可靠性。
项目成果
期刊论文数量(0)
专著数量(0)
科研奖励数量(0)
会议论文数量(0)
专利数量(0)
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Goldak, John其他文献
Three-dimensional numerical analysis of heat and mass transfer in heat pipes
- DOI:
10.1007/s00231-006-0166-y - 发表时间:
2007-06-01 - 期刊:
- 影响因子:2.2
- 作者:
Kaya, Tarik;Goldak, John - 通讯作者:
Goldak, John
Femoral fracture load and fracture pattern is accurately predicted using a gradient-enhanced quasi-brittle finite element model
- DOI:
10.1016/j.medengphy.2018.02.008 - 发表时间:
2018-05-01 - 期刊:
- 影响因子:2.2
- 作者:
Haider, Ifaz T.;Goldak, John;Frei, Hanspeter - 通讯作者:
Frei, Hanspeter
Goldak, John的其他文献
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{{ truncateString('Goldak, John', 18)}}的其他基金
Computational Mechanics of welds and welded structures
焊缝和焊接结构的计算力学
- 批准号:
RGPIN-2016-06177 - 财政年份:2021
- 资助金额:
$ 2.04万 - 项目类别:
Discovery Grants Program - Individual
Computational Mechanics of welds and welded structures
焊缝和焊接结构的计算力学
- 批准号:
RGPIN-2016-06177 - 财政年份:2020
- 资助金额:
$ 2.04万 - 项目类别:
Discovery Grants Program - Individual
Computational Mechanics of welds and welded structures
焊缝和焊接结构的计算力学
- 批准号:
RGPIN-2016-06177 - 财政年份:2019
- 资助金额:
$ 2.04万 - 项目类别:
Discovery Grants Program - Individual
Hot tap connections of pipelines
管道热插拔连接
- 批准号:
536615-2018 - 财政年份:2019
- 资助金额:
$ 2.04万 - 项目类别:
Collaborative Research and Development Grants
Computational Mechanics of welds and welded structures
焊缝和焊接结构的计算力学
- 批准号:
RGPIN-2016-06177 - 财政年份:2018
- 资助金额:
$ 2.04万 - 项目类别:
Discovery Grants Program - Individual
TCPL - Hot Tap Connections II
TCPL - 热插拔连接 II
- 批准号:
507358-2017 - 财政年份:2017
- 资助金额:
$ 2.04万 - 项目类别:
Engage Plus Grants Program
Computational Mechanics of welds and welded structures
焊缝和焊接结构的计算力学
- 批准号:
RGPIN-2016-06177 - 财政年份:2017
- 资助金额:
$ 2.04万 - 项目类别:
Discovery Grants Program - Individual
Computational Mechanics of welds and welded structures
焊缝和焊接结构的计算力学
- 批准号:
RGPIN-2016-06177 - 财政年份:2016
- 资助金额:
$ 2.04万 - 项目类别:
Discovery Grants Program - Individual
Optimization of weld sequences
焊接顺序的优化
- 批准号:
500416-2016 - 财政年份:2016
- 资助金额:
$ 2.04万 - 项目类别:
Engage Grants Program
TCPL - Hot tap connections
TCPL - 热插拔连接
- 批准号:
491457-2015 - 财政年份:2015
- 资助金额:
$ 2.04万 - 项目类别:
Engage Grants Program
相似海外基金
Computational weld mechanics
计算焊接力学
- 批准号:
2922-2010 - 财政年份:2013
- 资助金额:
$ 2.04万 - 项目类别:
Discovery Grants Program - Individual
Computational weld mechanics
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- 批准号:
2922-2010 - 财政年份:2012
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$ 2.04万 - 项目类别:
Discovery Grants Program - Individual
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- 批准号:
2922-2010 - 财政年份:2011
- 资助金额:
$ 2.04万 - 项目类别:
Discovery Grants Program - Individual
Computational weld mechanics
计算焊接力学
- 批准号:
2922-2010 - 财政年份:2010
- 资助金额:
$ 2.04万 - 项目类别:
Discovery Grants Program - Individual
Computational weld mechanics
计算焊接力学
- 批准号:
2922-2007 - 财政年份:2009
- 资助金额:
$ 2.04万 - 项目类别:
Discovery Grants Program - Individual
Computational weld mechanics
计算焊接力学
- 批准号:
2922-2007 - 财政年份:2008
- 资助金额:
$ 2.04万 - 项目类别:
Discovery Grants Program - Individual
Computational weld mechanics
计算焊接力学
- 批准号:
2922-2007 - 财政年份:2007
- 资助金额:
$ 2.04万 - 项目类别:
Discovery Grants Program - Individual
Real time computational weld mechanics
实时计算焊接力学
- 批准号:
2922-2003 - 财政年份:2006
- 资助金额:
$ 2.04万 - 项目类别:
Discovery Grants Program - Individual
Real time computational weld mechanics
实时计算焊接力学
- 批准号:
2922-2003 - 财政年份:2005
- 资助金额:
$ 2.04万 - 项目类别:
Discovery Grants Program - Individual
Real time computational weld mechanics
实时计算焊接力学
- 批准号:
2922-2003 - 财政年份:2004
- 资助金额:
$ 2.04万 - 项目类别:
Discovery Grants Program - Individual