Prediction of Crack Initiation Life in Contact Fatigue
Prediction of Crack Initiation Life in Contact Fatigue
批准号:
8817869
负责人:
Leon Keer
金额:
$26.98万
依托单位:
依托单位国家:
美国
项目类别:
Continuing Grant
财政年份:
1989
资助国家:
美国
项目状态:
已结题
起止时间:
1989-01-01 至 1992-12-31
中文摘要
接触疲劳是导致轴承和许多其他摩擦元件磨损和点蚀的原因。疲劳过程由裂纹形核和裂纹扩展两部分组成,其中裂纹扩展的过程被很好地理解。在本研究中,将对裂纹的形核过程进行建模,并通过实验工作对模型进行验证。该模型将基于一个能量概念,该能量概念与均匀材料中位错偶极子在循环应力作用下的反复运动有关。
英文摘要
Contact fatigue is the cause of wear and pitting damage of bearings and many other triboelements. The fatigue process consists of crack nucleation and crack propagation, of which the latter process is reasonably well understood. In this study the crack nucleation process will be modeled and the model validated by experimental work. The model will be based on an energy concept associated with repeated movement of dislocation dipoles in a homogeneous material in response to cyclic stresses.
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批准号:0114429
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项目类别:Continuing Grant
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资助金额:$274.2万
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财政年份:2001
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负责人:Leon Keer
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依托单位:
US-Tunisia Cooperative Research: Crack Problems in Functionally Graded Materials Under Thermo-Mechanical Loading
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批准号:0080462
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项目类别:Standard Grant
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资助金额:$3.0万
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财政年份:2000
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依托单位:
Industry/University Cooperative Research Center for Surface Engineering and Tribology
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批准号:9909226
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项目类别:Continuing Grant
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资助金额:$27.0万
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财政年份:1999
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负责人:Leon Keer
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依托单位:
Functionally Graded Nano-coatings for Dry Machining
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批准号:9877136
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项目类别:Continuing Grant
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资助金额:$35.0万
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财政年份:1999
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负责人:Leon Keer
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依托单位:
Investigations of Chemical Mechanical Polishing
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批准号:9872592
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项目类别:Standard Grant
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资助金额:$5.0万
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财政年份:1998
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负责人:Leon Keer
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依托单位:
Effects of Material Nonuniformity in Earthquake Faulting
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批准号:9614357
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项目类别:Standard Grant
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资助金额:$13.79万
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财政年份:1997
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负责人:Leon Keer
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依托单位:
New Coating Structures for Enhanced Tribological Performance
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批准号:9610440
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项目类别:Standard Grant
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资助金额:$30.92万
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财政年份:1997
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负责人:Leon Keer
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依托单位:
Industry/University Cooperative Research Center for Engineering Tribology
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批准号:9419537
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项目类别:Continuing Grant
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资助金额:$18.1万
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财政年份:1994
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负责人:Leon Keer
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依托单位:
Prediction of the Fatigue Failure of Unbalanced Magnetron Sputtered Diamond-like Carbon Coated Rollers in Combined Rolling/Sliding Contact
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批准号:9415072
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项目类别:Continuing Grant
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资助金额:$21.01万
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财政年份:1994
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负责人:Leon Keer
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依托单位:
IUCRC for Fundamental Investigations in Microtribology
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批准号:9216257
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项目类别:Standard Grant
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资助金额:$5.0万
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财政年份:1992
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负责人:Leon Keer
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依托单位:
U.S.-U.K. Cooperative Research: Theories for Coatings and Thin Films
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批准号:9024671
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项目类别:Standard Grant
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资助金额:$1.0万
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财政年份:1991
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负责人:Leon Keer
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依托单位:
Analytical Models for Nonlinear Soil-Structure Interaction
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批准号:8315335
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项目类别:Continuing Grant
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资助金额:$15.51万
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财政年份:1984
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负责人:Leon Keer
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依托单位:
Theory of Stability Applied to Elastic Bodies With Moving Boundaries
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批准号:8006265
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项目类别:Standard Grant
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资助金额:$11.79万
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财政年份:1980
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负责人:Leon Keer
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依托单位:
Non-Hertzian Contact Stress Analysis
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批准号:7918015
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项目类别:Standard Grant
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资助金额:$10.5万
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财政年份:1980
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负责人:Leon Keer
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依托单位:
Theory of Stability Applied to Fracture
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批准号:7722155
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项目类别:Standard Grant
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资助金额:$15.63万
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财政年份:1978
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负责人:Leon Keer
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依托单位:
Fracture and Debonding of Composite Structures
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批准号:7204195
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项目类别:Standard Grant
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资助金额:$2.48万
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财政年份:1973
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负责人:Leon Keer
-
依托单位:
海外基金