Fatigue of Engineering Plastics |
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Page 13
... yield stress of the material may be reached ( provided that fracture does not intervene ) . In yielding , glassy polymers exhibit two distinct modes [ 25 , Chap . 6 ; 66 ] : shear ( or shear - resolvable ) yielding , and normal - stress ...
... yield stress of the material may be reached ( provided that fracture does not intervene ) . In yielding , glassy polymers exhibit two distinct modes [ 25 , Chap . 6 ; 66 ] : shear ( or shear - resolvable ) yielding , and normal - stress ...
Page 18
... Yield point Yield - strain hardening Strain softening transition Elastic limit Strain ( a ) Undeformed Homogeneous deformation Spherulite deformation mechanisms Fiberlike deformation | · | Small angle x - ray scattering patterns ( b ) ...
... Yield point Yield - strain hardening Strain softening transition Elastic limit Strain ( a ) Undeformed Homogeneous deformation Spherulite deformation mechanisms Fiberlike deformation | · | Small angle x - ray scattering patterns ( b ) ...
Page 27
... yield curves . Reduction in the yield stress ' dependence on temperature would have a similar effect . Indeed , polycarbonate exhibits such a reduced slope of yield stress versus tempera- ture ; the yield stress approaches the crazing ...
... yield curves . Reduction in the yield stress ' dependence on temperature would have a similar effect . Indeed , polycarbonate exhibits such a reduced slope of yield stress versus tempera- ture ; the yield stress approaches the crazing ...
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Common terms and phrases
adhesive ASTM ASTM STP Bucknall carbon cfrp component composites constant crack growth rate crack length crack tip craze crystalline cyclic loading da/dN decrease deformation discontinuous growth bands discussed ductile dynamic mechanical effect elastic elastic modulus energy epoxy fatigue behavior fatigue crack growth fatigue crack propagation fatigue failure fatigue fracture fatigue tests FCP behavior FCP rates fibers fracture mechanics fracture surface fracture toughness frequency sensitivity hysteresis hysteretic heating increase J. A. Manson Kambour loading cycles M. D. Skibo material matrix mean stress mm/cycle modulus molecular weight notched nylon 66 plastic zone PMMA polyacetal polycarbonate polymeric solids polystyrene properties PVDF R. W. Hertzberg Rabinowitz rubber S-N curve samples Section semicrystalline shear shown in Fig specimen spherulite static strain stress intensity factor stress level striations studies temperature rise tensile test frequency thermal failure tion toughening unnotched values viscoelastic yield strength ΔΚ