Fatigue of Engineering Plastics |
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Page 77
... plastic zone radius . For the case of plane strain where plastic constraint restricts the develop- ment of the plastic zone , the size is estimated [ 12 ] to be ༤ 1 K2 σπ στ ys • ( 3.6 ) Y 0 X Z Fig . 3.2 Stress distribution around 3.2 ...
... plastic zone radius . For the case of plane strain where plastic constraint restricts the develop- ment of the plastic zone , the size is estimated [ 12 ] to be ༤ 1 K2 σπ στ ys • ( 3.6 ) Y 0 X Z Fig . 3.2 Stress distribution around 3.2 ...
Page 78
... plastic zone see Section 3.8.1 . Whether plane strain or plane stress conditions will apply in a given situation depends upon the size of the plastic zone relative to the component thickness and actual crack length . For example , plane ...
... plastic zone see Section 3.8.1 . Whether plane strain or plane stress conditions will apply in a given situation depends upon the size of the plastic zone relative to the component thickness and actual crack length . For example , plane ...
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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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 flaw 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