Mr. Scales has expertise in the fundamental mechanics of solids, structures, and materials, with a knowledge base that includes elasticity, metal plasticity, fracture, and structural stability. He is experienced in modern experimental methods for mechanical characterization of materials, including design of experiments, operation of servo-hydraulic testing systems, and deformation measurement with digital image correlation. He has conducted non-linear finite element analyses of large-deformation processes using advanced constitutive models. Mr. Scales also has experience in metallographic sample preparation, microscopy, and failure analysis. He has applied his skillset to a variety of problems involving analysis of stress and strain, including sheet metal forming operations such as biaxial stretching, and bicycle component failures.
As a graduate student at the University of Texas, Mr. Scales studied localization and ductile failure of aluminum alloys in support of the automotive industry’s efforts to reduce vehicle weight through, for example, the adoption of aluminum unibody construction. He developed experimental programs in which custom-designed specimens were loaded to failure under biaxial stress states. These experiments included combined tension, torsion, and internal pressure of tubular specimens, and hydraulic bulge tests of sheet metal. Mr. Scales also used his experimental measurements to establish the alloy’s plastic anisotropy and conduct finite element analyses that incorporated this anisotropy. He served as a teaching assistant for courses in solid mechanics, advanced strength of materials, and dynamics.
Prior to graduate school Mr. Scales was an officer in the US Navy where he served as a steam generator technology engineer in the Naval Nuclear Propulsion Program. In this role he evaluated proposed changes to plant operation and water chemistry, analyzed data from material tests and component inspections, and evaluated test proposals to ensure the integrity of the nuclear fleet’s operating steam generators. He also oversaw maintenance, inspection, and repair activities at shipyards, and was involved in every step of the process from planning and budgeting to execution and debriefing.
CREDENTIALS & PROFESSIONAL HONORS
- M.S., Engineering Mechanics, University of Texas, Austin, 2018
- B.S., Civil Engineering, University of Texas, Austin, 2008
Chen K, Kyriakides S, Scales M. Effect of material frame rotation on the hardening of an anisotropic material in simple shear tests. ASME Journal of Applied Mech 2018. 85(12): 124501; 1-5
Chen K, Scales M, Kyriakides S. Material hardening of a high ductility aluminum alloy from a bulge test. Int’l Journal of Mechanical Sciences 2018. 138 139: 476-488.
Scales M, Tardif N, Kyriakides S. Ductile failure of aluminum alloy tubes under combined torsion and tension. Int’l Journal of Solids and Structures 2016. 97-98: 116–128.
Chen K, Scales M, Kyriakides S, Corona E. Effects of anisotropy on material hardening and burst in the bulge test. Int’l Journal of Solids and Structures 2016. 82: 7-84.
Chen K, Scales M, Kyriakides S. Ductile failure under combined tension and shear. USNC/TAM, Chicago, IL, 2018.
Chen K, Scales M, Kyriakides S. Response and failure of aluminum alloys under combined loads. ASME IMECE, Tampa, FL, 2017.
Chen K, Scales M, Kyriakides S. Modeling of the response and localization that precede failure under combined shear and tension. Society of Engineering Science, Boston, MA, 2017.
Scales K, Kyriakides S, Tardif N. Ductile failure of an aluminum alloy under moderate to low triaxialities. Int'l Congress of Theoretical and Applied Mechanics. Montreal, Quebec, Canada, 2016.
Chen K, Scales M, Kyriakides S, Corona E. Anisotropy in an aluminum alloy sheet and its effect on the onset of failure in a bulge test. ASME Applied Mechanics and Materials Conference. Seattle, WA, 2015.
International Journal of Solids and Structures