Fatigue of engineering plastics |
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Page 86
In this regard, Knauss and Dietman [46] and Wnuk [47] introduced the concept of
an effective stress intensity factor AKeff = AKtl„I{t)/I(o), (3.13) where AAfeff is the
effective stress intensity factor range, AA^e[as the completely elastic stress ...
In this regard, Knauss and Dietman [46] and Wnuk [47] introduced the concept of
an effective stress intensity factor AKeff = AKtl„I{t)/I(o), (3.13) where AAfeff is the
effective stress intensity factor range, AA^e[as the completely elastic stress ...
Page 96
poor FCP response of the HI-N66-rich blends at high AK levels was due to lower
yield strengths— giving rise to larger plastic zones than in the lean HI-N66
blends— and lower elastic moduli, the latter resulting in larger cyclic strains per
unit ...
poor FCP response of the HI-N66-rich blends at high AK levels was due to lower
yield strengths— giving rise to larger plastic zones than in the lean HI-N66
blends— and lower elastic moduli, the latter resulting in larger cyclic strains per
unit ...
Page 135
3.10b). One major uncertainty regarding the normalization of polymer da/dN
versus AK data involves the proper choice of elastic constant. Not only does the
complex modulus contain storage and loss components, but the experimental
values ...
3.10b). One major uncertainty regarding the normalization of polymer da/dN
versus AK data involves the proper choice of elastic constant. Not only does the
complex modulus contain storage and loss components, but the experimental
values ...
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Contents
Fatigue Crack Propagation | 74 |
Fatigue Fracture Micromechanisms in Engineering Plastics | 146 |
Composite Systems | 184 |
Copyright | |
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Common terms and phrases
adhesive amplitude ASTM ASTM STP Bucknall carbon cfrp component Composite Materials composites constant crack growth rates crack length crack tip craze crystalline cyclic loading da/dN decrease deformation discontinuous growth bands discussed ductile effect elastic elastic modulus energy epoxy fatigue behavior fatigue crack growth fatigue crack propagation fatigue failure fatigue fracture fatigue response fatigue tests FCP behavior FCP rates fibers flaw fracture mechanics fracture surface fracture toughness frequency sensitivity hysteresis hysteretic heating increase J. A. Manson Kambour laminates loading cycles M. D. Skibo material matrix mean stress 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 shown in Fig specimen spherulite static stress intensity factor stress level striation studies temperature rise tensile test frequency thermal failure tion toughening unnotched values viscoelastic yield strength