Fatigue of Engineering Plastics |
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Page 43
... stress levels . It is seen that for all stress levels above the endurance limit ( ~ 6 MPa ) ( the endurance limit is considered to be the stress level below which fatigue failure is not observed ) , the polymer heated up to the point of ...
... stress levels . It is seen that for all stress levels above the endurance limit ( ~ 6 MPa ) ( the endurance limit is considered to be the stress level below which fatigue failure is not observed ) , the polymer heated up to the point of ...
Page 53
Richard W. Hertzberg, John A. Manson. STRESS σ 0.76 Log N Fig . 2.13 Stress decay curve . Fatigue life N * corresponds to cyclic stress level equal to 70 % of initial value σ¡ . induced softening of the material . Cyclic - induced ...
Richard W. Hertzberg, John A. Manson. STRESS σ 0.76 Log N Fig . 2.13 Stress decay curve . Fatigue life N * corresponds to cyclic stress level equal to 70 % of initial value σ¡ . induced softening of the material . Cyclic - induced ...
Page 108
... stress levels as a function of ( a ) AK and ( b ) 2. Note the superior correlation with AK . [ Reprinted with ... level . In fact , it was found that the fatigue data were better correlated by using the AK parameter rather than λ ( Fig . 3.21 ) ...
... stress levels as a function of ( a ) AK and ( b ) 2. Note the superior correlation with AK . [ Reprinted with ... level . In fact , it was found that the fatigue data were better correlated by using the AK parameter rather than λ ( Fig . 3.21 ) ...
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