Last modified:
May 11, 1999

Where's the bearing?


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The Yu Family

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

  
 Yu, Wei-Kuei (Eric)
Ph.D./ Research Assistamt
Department of Mechanical Engineering
The Pennsylvania State University
317 Reber Building
University Park, PA 16802
Phone: (814) 861-6813
Fax: (814) 863-4848
Email: [email protected]

Advisor: T. A. Harris

Technical Interests/Experience

Ball and Roller-Bearing technology, tribology, machine design
  • Model Validation of Ball/V-ring test rig developed by Pratt and Whitney Aircraft Inc. This rig simulates the conditions by a ball in the angular contact ball bearing of gas turbine engine mainshafts.

  • Development of a new stress-based fatigue life model for rolling element bearing. The new model contains:
    • Octahedral shear stress and hydrostatic stress(perpendicular to the octahedral plane) are chosen as Failure-causing stresses
    • Based on Weibull theory but different form from L-P theory
    • No depth (z) effect
    • New stress-life constant (c)
    • Incremental stress volume from I-H theory
    • Effective stress volume

  • Design of an tension/torsion machine to reproduce the stress cycle occuring under a contact. A tubular specimen can also be under alternative internal pressure. This machine can be used to further understand the failure mode under contact.

EDUCATION

September 1995 - Present

Ph.D. candidate in Mechanical Engineering, The Pennsylvania State University, University Park, PA 16802
Thesis: A New Fatigue Life Model for Rolling Element Bearings
(Expected date of graduation: May, 1999)

August 1991 - September 1994

MS in Mechanical Engineering, The Pennsylvania State University, State College, PA, 16802.
Thesis: Adaptive-Passive Control of Structural Vibration via Piezoelectric Materials with Adaptive Circuit

September 1984 - May 1988

Bachelor Degree in Mechanical Engineering, National Chung-Hsing University, Taichung, Taiwan

AFFILIATIONS

Member of American Society of Mechanical Engineers (ASME)
Member of STLE

PUBLICATIONS

Harris, T. A. and W. K. Yu, "Lundberg-Palmgren Fatigue Theory: Considerations of Failure Stress and Stressed Volume," ASME Journal of Tribology, to be published.
Harris, T. A., M. N. Kotzalas, and W. K. Yu, "On the Causes and Effects of Roller Skewing in Cylindrical Roller Bearings," STLE, to be published.
Wang, K. W., J. S. Lai, and W. K. Yu. "An Energy-Based Parametric Control Approach for Structural Vibration Suppression via Semi-Active Piezoelectric Networks." ASME Journal of Vibration and Acoustics vol. 118, n. 3, pp. 505-509 (1996).

Current Web Sites I Devote:

   


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