. DAVID C. ERLICH

Position

Specialized Professional Competence

Design, performance, analysis, and computational simulation of experiments to characterize the constitutive relations and failure mechanisms of solids and liquids undergoing transient, quasistatic, or cyclical high-pressure loading

Representative Research Assignments at SRI (Since 1968)

	Development of light gas gun and high explosives techniques for well-characterized, transient high-pressure loading of condensed materials
	Characterization of dynamic tensile failure in propellants, metals, high explosives, polymers, liquids, and fiber composites
	Use of multiple-embedded Lagrangian stress and particle velocity gages to determine constitutive relations of rocks, propellants, porous foams and ceramics, fiber composites, metallic powders, and other complex materials
	Characterization of resistance of various metals, composites, and high-strength fabrics to engine fragment penetration
	Contained fragmenting cylinder technique for studying adiabatic shear banding in metals
	Symmetric and asymmetric rod impact technique for determining dynamic flow curves for various alloys of steel, aluminum, uranium, tantalum, etc.
	Gas gun and pellet impact experiments to study dynamic crack instability and impact erosion in ceramics and polymers
	Characterization of bubble dynamics in scale-model nuclear reactor explosion simulation experiments
	Development of miniaturized shear and compressive loading techniques for in situ testing in SALI apparatus
	Development of porous material equation-of-state computational models, and computer simulation of low-velocity detonation in monopropellants and stress relaxation in metals
	Measurements of stresses induced in metals by laser bombardment
	Design and implementation of modifications to existing gas guns to increase performance and versatility
	Fatigue, quasistatic rupture, dynamic compression, and dynamic one-point-bend testing of various metals

Academic Background

B.S. in physics (1968), California Institute of Technology

Professional Associations

	American Physical Society Topical Conference on Shock Compression of Condensed Media- Technical Program Committee (1986-1989)
	Aeroballistic Range Association - SRI International representative (1988-1994)

Publications

26 published papers, 7 abstracts, one section in an ASM Metals Handbook, and numerous technical reports on dynamic tensile failure, shear banding, dynamic constitutive relations, and other related topics