Fatigue of Engineering Plastics |
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Page 81
... crack extension when the crack is small and , possibly , undetected . From Fig . 3.4 , it is also seen that da / dN increases with increasing stress level such that da / dN x f ( o , a ) . ( 3.9 ) Numerous relationships have been ...
... crack extension when the crack is small and , possibly , undetected . From Fig . 3.4 , it is also seen that da / dN increases with increasing stress level such that da / dN x f ( o , a ) . ( 3.9 ) Numerous relationships have been ...
Page 102
... crack growth rates in poly- ethylene in methanol to be controlled by the prevailing stress intensity factor value at the advancing crack tip ( Fig . 3.15 ) . Of particular interest , the rate of crack extension at a given stress ...
... crack growth rates in poly- ethylene in methanol to be controlled by the prevailing stress intensity factor value at the advancing crack tip ( Fig . 3.15 ) . Of particular interest , the rate of crack extension at a given stress ...
Page 112
... crack - tip profile as was the case in strain crystallizable rubbers . Therefore , a higher mean stress should serve ... extension rate below that expected at a particular AK level . This delay in crack growth in certain cases can lead ...
... crack - tip profile as was the case in strain crystallizable rubbers . Therefore , a higher mean stress should serve ... extension rate below that expected at a particular AK level . This delay in crack growth in certain cases can lead ...
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