Fatigue of Engineering Plastics |
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Page xv
... elastic modulus D = E Ed = dynamic elastic modulus γ = surface energy G = shear modulus I ( t ) J " = = K G - dU / da = strain energy release rate creep compliance loss compliance K = stress intensity factor = fracture toughness = max ...
... elastic modulus D = E Ed = dynamic elastic modulus γ = surface energy G = shear modulus I ( t ) J " = = K G - dU / da = strain energy release rate creep compliance loss compliance K = stress intensity factor = fracture toughness = max ...
Page 86
... elastic stress intensity range , and I ( t ) / I ( o ) the normalized creep compliance of the material . For an ideal elastic solid , I ( t ) / I ( 0 ) = 1 and AKeff = AKelas For times greater than zero , the value of I ( t ) is ...
... elastic stress intensity range , and I ( t ) / I ( o ) the normalized creep compliance of the material . For an ideal elastic solid , I ( t ) / I ( 0 ) = 1 and AKeff = AKelas For times greater than zero , the value of I ( t ) is ...
Page 111
... elastic and plastic deformation and also diverted into providing for entropic changes within the damage zone . That is , some energy otherwise targeted for the fracture process may be consumed in changing the molecular conformation near ...
... elastic and plastic deformation and also diverted into providing for entropic changes within the damage zone . That is , some energy otherwise targeted for the fracture process may be consumed in changing the molecular conformation near ...
Contents
Fatigue Crack Propagation | 74 |
Fatigue Fracture Micromechanisms in Engineering Plastics | 146 |
Composite Systems | 184 |
Copyright | |
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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 Kmax laminates 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 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