Fatigue of Engineering Plastics |
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Page 35
... plastic * strains are generated . That fatigue fractures do occur when nominal applied stresses are below the material yield strength reflects the fact that surface or internal stress concentrations are present , which readily elevate ...
... plastic * strains are generated . That fatigue fractures do occur when nominal applied stresses are below the material yield strength reflects the fact that surface or internal stress concentrations are present , which readily elevate ...
Page 77
... plastic zone For the case of plane strain where plastic constraint restricts the develop- ment of the plastic zone , the size is estimated [ 12 ] to be 1 K2 ( 3.6 ) σπ σ 2 ys Την 0x 0 X Fig . 3.2 Stress distribution around 3.2 ...
... plastic zone For the case of plane strain where plastic constraint restricts the develop- ment of the plastic zone , the size is estimated [ 12 ] to be 1 K2 ( 3.6 ) σπ σ 2 ys Την 0x 0 X Fig . 3.2 Stress distribution around 3.2 ...
Page 115
... plastic strip model to better describe the crack tip damage zone [ 38 , 45 , 108 , 118-120 ] . The Dugdale model supposes that the plastic strip is in the plane of the crack and bears a uniform stress equal to the yield strength of the ...
... plastic strip model to better describe the crack tip damage zone [ 38 , 45 , 108 , 118-120 ] . The Dugdale model supposes that the plastic strip is in the plane of the crack and bears a uniform stress equal to the yield strength of the ...
Contents
Fatigue Crack Propagation | 74 |
Fatigue Fracture Micromechanisms in Engineering Plastics | 146 |
Composite Systems | 184 |
Copyright | |
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Common terms and phrases
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