Dynamic Mechanical Testing Response for Classical Extremes Purely Elastic Purely Viscous Response Response (Hookean Solid) (Newtonian Liquid) Stress Stress Strain StrainDynamic Mechanical Testing Response for Classical Extremes Stress Strain  = 0°  = 90° Purely Elastic Response (Hookean Solid) Purely Viscous Response (Newtonian Liquid) Stress Strain