Fatigue of Engineering Plastics |
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Page 27
Richard W. Hertzberg, John A. Manson. 30 STRESS ( ksi ) O POLYCARBONATE • % .2 ... stress is lower and the material fails before yielding . If crazing plays a ... field becomes increasingly severe . In general , maximum ductility in ...
Richard W. Hertzberg, John A. Manson. 30 STRESS ( ksi ) O POLYCARBONATE • % .2 ... stress is lower and the material fails before yielding . If crazing plays a ... field becomes increasingly severe . In general , maximum ductility in ...
Page 77
... stress analysis involving concepts of elastic theory . Based on the method of Westergaard [ 10 ] , Irwin was able to describe the stress field at a crack tip using the notation shown in Fig . 3.2 such that a = K ( 2лг ) 1 / COS 0 1 + ...
... stress analysis involving concepts of elastic theory . Based on the method of Westergaard [ 10 ] , Irwin was able to describe the stress field at a crack tip using the notation shown in Fig . 3.2 such that a = K ( 2лг ) 1 / COS 0 1 + ...
Page 254
... stress direction , the original length of the stress raiser , dD / dN the rate of damage accumulation per cycle , σ ... field , and ( 3 ) the validity of Miner's law , a model was developed for crack growth from an initial notch and ...
... stress direction , the original length of the stress raiser , dD / dN the rate of damage accumulation per cycle , σ ... field , and ( 3 ) the validity of Miner's law , a model was developed for crack growth from an initial notch and ...
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Common terms and phrases
adhesive 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 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 semicrystalline 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