Fatigue of Engineering Plastics |
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Page 49
Richard W. Hertzberg, John A. Manson. Uniaxial thermal / fatigue changeover stress ( MN / m2 ) 25 20 35 B - 0.4 mm B = 0.4 B - 0.63mm * 1 I Hz 102 10 Hz 103 100 Hz 104 Fig . 2.11 Log frequency ( cycles / min ) Change - over stress from ...
Richard W. Hertzberg, John A. Manson. Uniaxial thermal / fatigue changeover stress ( MN / m2 ) 25 20 35 B - 0.4 mm B = 0.4 B - 0.63mm * 1 I Hz 102 10 Hz 103 100 Hz 104 Fig . 2.11 Log frequency ( cycles / min ) Change - over stress from ...
Page 51
... thermal effects , but the overwhelming effect of the notch on fatigue life proved to be negative . As Andrews [ 26 ] stated in his review of fatigue in polymers , " It is obvious that a specimen containing stress concentrations ( e.g. ...
... thermal effects , but the overwhelming effect of the notch on fatigue life proved to be negative . As Andrews [ 26 ] stated in his review of fatigue in polymers , " It is obvious that a specimen containing stress concentrations ( e.g. ...
Page 52
... thermal melting but did have an adverse effect on the material's resistance to fatigue crack growth ( see Section 3.4 ) . One key to the thermal fatigue mechanism clearly relates to size effects [ 13 , 14 , 18 , 25 ] with thermal ...
... thermal melting but did have an adverse effect on the material's resistance to fatigue crack growth ( see Section 3.4 ) . One key to the thermal fatigue mechanism clearly relates to size effects [ 13 , 14 , 18 , 25 ] with thermal ...
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