钱才富
疲劳与断裂,有限元分析及计算机辅助工程,化工过程机械。
个性化签名
- 姓名:钱才富
- 目前身份:
- 担任导师情况:
- 学位:
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学术头衔:
博士生导师
- 职称:-
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学科领域:
化工机械与设备
- 研究兴趣:疲劳与断裂,有限元分析及计算机辅助工程,化工过程机械。
钱才富,北京化工大学机械工程学院教授,博士生导师。南京化工大学和美国罗切斯特大学联合培养博士,导师为戴树和教授和美国工程院院士李振民教授,1996年毕业,博士论文题目为“II型和复合型疲劳裂纹扩展以及位错从I型裂纹尖端的发射”。1995至1997为香港科技大学访问学者。一直从事材料力学性能、位错与裂纹相互作用、疲劳与断裂以及有限元分析等方面的教学与研究,有很好的力学、数学和材料方面的基础以及计算机程序设计能力。
现为北京化工大学过程装备与控制工程系主任,全国高等学校过程装备与控制工程专业教学指导分委员会秘书长, 中国机械学会压力容器设计分会委员, 《北京化工大学学报》、《化工机械》、《Journal of Pressure Equipment and Systems》杂志编委。取得国家级精品课程一门(第一主讲教师);取得国家级教学成果二等奖一项(排名第一),北京市教改成果一等奖一项(排名第一);教育部科技进步二等奖一项(排名第七)。
主要研究领域:疲劳与断裂,有限元分析及计算机辅助工程,化工过程机械。
现已发表论文近100篇,其中40余篇被SCI或/和EI收录。
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【期刊论文】Emission of an Edge Dislocation from a Thin-Film-Covered Crack
钱才富, C.-F.Qian, T.-Y.Zhang, P.Tong
Key Engineering Materials Vols. 145-149 (1998) pp. 161-166,-0001,():
-1年11月30日
The emission of an edge dislocation from a thin-film-covered crack is studied in order to investigate the effects of a passive film on stress-corrosion cracking. The results show that the crack stress field in the film due to the applied loads is enhanced by a harder film or abated by a softer film. For an edge dislocation is the film is harder. Under pure mode II or III loadings a harder thin film makes the dislocation emission easier and a softer film makes the dislocation emission more difficult if the film thickness is smaller than a critical value. The opposite is also true if the film thickness is larger than the critical value. Under pure mode I loadings, however, a harder thin film makes the dislocation emission more difficult and a softer film makes the dislocation emission easier for the two flim thicknesses used in this study.
Stress-Corrosion Cracking, Edge Dislocation Emission, Fracture, Thin Film, Stress Intensity Factor
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【期刊论文】Reliability Study of the Hydraulically Expanded Tube-to-Tubesheet Joint
钱才富, Caifu Qian, Chenghong Duan, Hongjie Yu, Hongwei Duan, Junli Tian
Transactions of the ASME Vol. 128, AUGUST 2006,-0001,():
-1年11月30日
A three-dimensional parametrized finite element model is established for the nonlinear analysis of the hydraulically expanded tube-to-tubesheet joint. Distribution of the residual contact pressure on the contact surface between the tube and the tubesheet is investigated. It is found that sealing circular bands exist on the contact surface which enhance the sealing of the joint since the residual contact pressures on the sealing circular bands are higher than on other positions. The sealing circular bands are located close to the two ends of the hole when it is not grooved, but they are located at the two brinks of the groove for a grooved hole and in the latter case, the residual contact pressures are even higher, reflecting that the joint with a grooved tube-sheet hole is more capable of sealing. Experiments and finite element calculations for the pull-out force of the joint are also performed for different expansion pressures and groove widths. Results show that with the increase of the groove width, the measured pull-out force increases significantly and becomes larger and larger than the calculated one, which is owing to the scratch on the contact surface between the tube and tubesheet.
hydraulically expanded joint, finite element analysis, sealing, pull-out force
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【期刊论文】Simulation of edge dislocation emission from a crack under in-plane shear
钱才富, C.F. Qian, H.F. Li, Z.J. Jiang, D.S. Fan
C. F. Qian et al. Theoretical and Applied Fracture Mechanics 43 (2005) 369-375,-0001,():
-1年11月30日
Considered is the tandem emission of dislocations and dislocation dipoles from a crack under in-plane shear in one slip system as well as multiple slip systems. Effective stress intensity factors are determined by considering zones of local distortion similar to that in macro-plasticity. The dislocation free zone (DFZ) is also obtained which is analogous to the core region in fracture mechanics. Studied are effects of dislocation emission or development of plastic zone in front of the crack tip on the potential crack propagation based on the strain energy density factor criterion.
Crack, Dislocation emission, Plastic zone, Stress intensity factor
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【期刊论文】Grack initiation ahead of piled-up of dislocations emitted from a mode II blunt crack
钱才富, Caifu Qian, Wuyang Chu, Lijie Qiao
Journal of University of Science and Technology Beijing Volume 9, Number 5, October 2002, Page 372,-0001,():
-1年11月30日
In situ tensile tests in a transmission electron microscope (TEM) show that dislocations emitted from a mode II crack tip will form a inverse piled-up group after equilibrium or a double piled-up group when they meet a obstruction, e.g., grain boundary or second phase. A microcrack can initiates in front of the piled-up group of dislocations. Micromechanics analysis shows that dislocations emitted from a mode II blunnt crack tip can form a inverse piled-up or double piled-up group, depending upon the applied stress intensity factor Km, lattice friction stress t f and the distance of the obstruction from the crack tip L, The maximum normal stress in front of the double piled-up group which is located at the direction of a =-64
mode II blunt crack, dislocation emission, crack initiation, double piled-up group
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钱才富, Cai-Fu Qian, J.C.M. Li
C. -F. Qian. J. C. M. Li. Mechanics of Materials 24 (1996) 1-10,-0001,():
-1年11月30日
While many edge dislocations can be emitted from the tip of a Mode I crack, the distribution of these dislocations turns out to be dependent on the number of available slip systems as well as the order of emission. This study deals with the situation in which the edge dislocations are emitted one at a time and along a slip plane in which the shear stress is the largest. The result shows that most of the dislocations are confined in two or four symmetric planes even though 34 slip planes are available. Dislocations are emitted along two symmetric planes until they are almost saturated and then the emission is switched to another two planes nearby. The switching reduces crack tip shielding so that more dislocations are emitted in four planes than if the emission is limited to two planes. There is a dislocation-free zone near the crack tip whose size increases with the critical stress intensity factor for dislocation emission.
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钱才富, Cai-Fu Qian, J.C.M. Li
C. -F. Qian. J. C. M. Li. Mechanics of Materials 24 (1996) 11-17,-0001,():
-1年11月30日
In an effort to simulate dislocation distribution around a Mode I crack, edge dislocations are allowed to be emitted from the crack tip along many possible slip planes containing the crack tip. it turned out that the final distribution depends on the order of emission. So the previous paper dealt with the situation in which the emission process is one at a time, namely after one dislocation is emitted the plastic zone is re-equilibrated before the next dislocation is emitted. In this paper, many dislocations are emitted at the same time when the condition is met, namely, when the slip force exceeds the lattice friction for dislocation motion. It is found that the dislocations are more uniformly distributed than the previous case of sequential emission. The shielding effect for the same number of dislocations emitted is less when the dislocations are distributed along more slip planes. The shape of the plastic zone is different from but the size is comparable with the plastic zone based on yon Mises or Tresca criterion. A distinct dislocation-free zone appears when there is a critical stress intensity factor for dislocation emission.
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