Interests and Background
- Fatigue and fracture: analysis, testing, and design
- Residual stress measurement
- Structural integrity and damage tolerance (aircraft structure, mechanical systems)
- Effects of maintenance quality on aircraft structural performance
- Laser shock peening, cold working, and other residual stress treatments for metals
- Finite element simulation for structural analysis
- Experimental mechanics
- Measurements in general (here is an interesting history of measurements)
- Laser shock peening: process characterization, effects on fatigue behavior
- Prediction of fatigue and fracture behavior for residual stress bearing materials
- Improvement of metallic structures using residual stress treatments
- Correction of fracture and fatigue data for residual stress effects
- Measurement of residual stress in metallic and metallic-ceramic composites
- Development of the contour method for residual stress measurement
- Standardization of the slitting method for residual stress measurement
- PhD in Mechanical Engineering, September, 1996. Stanford University, Stanford, CA. Department of Mechanical Engineering. Dissertation research described below. Advisors: Drew V. Nelson and Sheri Sheppard.
- MS in Mechanical Engineering, May 1991. University of Arizona, Tucson, AZ. Course work emphasis in probabilistic design and reliability, mechanics, and structural dynamics. Advisor: Paul H. Wirsching.
- BS in Mechanical Engineering, May 1989. University of Arizona, Tucson, AZ.
- Professor, University of California, Davis, 5/10 – Present
- Associate Professor, University of California, Davis, 7/04 – 5/10
- Founder and Chief Executive, Hill Engineering, LLC (a UC Davis start-up), 1/05 – Present
- Assistant Professor, University of California, Davis, 9/96 – 6/04
- Dissertation Research, Stanford University. 9/92 – 8/96
- Title: Determination of Residual Stress Based on the Estimation of Eigenstrain
- Developed a hybrid experimental-analytical method to determine sub-surface residual stress, results presented at ASME PVP95 and ASME PVP96.
- Investigated the influence of residual stress on fatigue and fracture.
- Produced literature review on fatigue crack propagation in welded joints.
- Wrote grant proposals, final and interim reports.
- Consultant, Sverdrup Technology, Ames Division. 3/95 – 12/95
- Quantified the influence of residual stress on the initiation of ductile crack growth.
- Findings accepted for publication.
- Consultant, Apple Computer. 7/94 – 12/94
- Performed failure investigation for flat panel display assemblies.
- Presented findings to high-level management of Apple and display vendor.
- Student Assistant, NASA Ames R. C., Mechanical Systems Branch. 6/91 – 6/94
- Studied ductile crack initiation of small specimens as part of a team.
- Performed numerical modeling and experimental observation of crack initiation.
- Characterized fatigue crack growth behavior of aluminum alloy welds.
- Conducted fatigue testing of full-scale, proof-loaded pressure vessel.
- Presented findings at ASME PVP93.
- Work published in the Journal of Pressure Vessel Technology.
- ASME – member PVP Division, Materials and Fabrication Committee
- ASTM – member Committee E08 on Fatigue and Fracture