A5033196448- Surface Treatment and Residual Stress
- High-Velocity Impact and Material Behavior
- Erosion and Abrasive Machining
- Laser-Plasma Interactions and Diagnostics
- Innovative Teaching and Learning Methods
- Fire effects on concrete materials
- Teaching and Learning Programming
- Diamond and Carbon-based Materials Research
- Intelligent Tutoring Systems and Adaptive Learning
- Metal and Thin Film Mechanics
- Thermography and Photoacoustic Techniques
- Ultrasonics and Acoustic Wave Propagation
- Laser Material Processing Techniques
- Welding Techniques and Residual Stresses
United States Air Force Research Laboratory
2022
U.S. Air Force Institute of Technology
2018-2019
Carnegie Mellon University
2015
United States Air Force Academy
2015
Laser shock peening (LSP) is a method of work hardening used to improve fatigue life. Finite element (FE) modeling LSP lacks confidence, primarily due the unknown shape acting pressure impulse in both time and space. This developed tested an integrated FEM/optimization model determine 'best fit' based on easy measure surface displacement residual stress data from single burst. Isight optimization software was conjunction with Abaqus FEM, MATLAB, Excel utilize Hooke-Jeeves algorithm for...
Abstract Computer tutor versus solving problems by hand: a comparison in statics While computer-based instruction can be used to automate the process of gradinghomework, sometimes its goal is provide formative feedback students whilelearning. Formative often straightforward when areperforming simple tasks, such as answering multiple-choice questions. In case ofproblems that are more complex, with many correct pathways solution, task ofenabling computer follow student work and much...
This work investigates the relaxation of shot peen induced compressive residual stress in nickel-base superalloy ME3 due to thermal exposure at 538°C and 704°C for one hour 100 hours. The hole-drilling method is used measure stresses. magnitude decreases rapidly first exposure, further occurs more slowly. At 538°C, relaxed by 33% 36% after 704°C, 51% 85% Additional needed fully characterize behavior.