Mechanical Behavior of Materials |
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Page 4
... viscoelastic material is stretched ( the strain rate ) . With in- creasing strain rate a viscoelastic material becomes stiffer ; for example , the " aver- age " modulus ( e.g. , σ1 / ɛ1 in Fig . 1.4b ) increases with strain rate ...
... viscoelastic material is stretched ( the strain rate ) . With in- creasing strain rate a viscoelastic material becomes stiffer ; for example , the " aver- age " modulus ( e.g. , σ1 / ɛ1 in Fig . 1.4b ) increases with strain rate ...
Page 70
... viscoelastic deformation . As noted , viscoelasticity refers to time- dependent elastic deformation . It is observed in a number of metallic and non- metallic materials , but is most important in polymers . The time dependence of ...
... viscoelastic deformation . As noted , viscoelasticity refers to time- dependent elastic deformation . It is observed in a number of metallic and non- metallic materials , but is most important in polymers . The time dependence of ...
Page 75
... viscoelastic . If the elastic modulus is defined as the stress divided by the ( instantaneous ) strain , the modulus lies between two extremes : the unrelaxed modulus E1 = σ / ɛ , and the relaxed modulus E , = σ / ɛ2 . On unloading ...
... viscoelastic . If the elastic modulus is defined as the stress divided by the ( instantaneous ) strain , the modulus lies between two extremes : the unrelaxed modulus E1 = σ / ɛ , and the relaxed modulus E , = σ / ɛ2 . On unloading ...
Contents
Overview of Mechanical Behavior | 1 |
Toughening Mechanisms and the Physics of Fracture | 10 |
Elastic Behavior | 44 |
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alloys applied stress behavior brittle Burgers vector ceramics Chap CHAPTER Coble creep composite crack growth crack propagation crack tip craze creep fracture creep rate Crystalline Materials cubic curve cyclical decreases diffusion diffusional discussed dislocation density dislocation line dislocation motion displacement ductile ductile fracture edge dislocation embrittlement energy equation fatigue fiber Figure flow stress Fracture Mechanics fracture toughness glass glide grain boundaries hardening high-temperature increases initial length linear elastic loading low-temperature macroscopic martensite material's matrix mechanism map MN/mē Mode modulus noncrystalline nucleation obstacles particle phase plastic deformation plastic flow plastic strain polycrystals polymers precipitation Prob ratio region result Schematic screw dislocation SECTION shear stress shown in Fig single crystal slip plane slip systems solid solute atom steel strain rate strengthening stress levels stress-strain structure superplastic surface takes place temperature tensile strength tensile stress tion toughening transition viscoelastic viscosity volume fraction yield strength