BIOE-257 Study Guide - Spring 2019, Comprehensive Final Exam Notes - Viscoelasticity, Shear Stress, Modulus Guitars
30 Mar 2019
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Document Summary
Material classifications: metals (pure and alloys, ceramics (compounds between metallic and nonmetallic elements, polymers, composites, semiconductors, biomaterials, smart materials, nanomaterials. Directional, structures of low coordination and low density. Weak insulator, conduction by ion transport when liquid. Absorption and other properties mainly of individual ions. High refractive index, absorption different in solid or gas. Yield strength, ultimate tensile strength, failure strength, strength to failure. Stress and strain: strain: a non-dimensional quantity that describes the change in a component"s physical configuration during loading. Shear strain: stress: transmission of force through deformable materials. Force vector can be resolved in the three standard xyz dimensions. Stress: stress = f/a, a material continuum (b) occupies a spatial region v, where delta s is a small surface element. T (the stress vector or traction representing force acting per unit area on a surface) = df/dsv. Strain: deformation of a solid that can be related to stresses is described by strain, strain measures.
