Fatigue of Engineering Plastics |
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Page 114
... zone of damage is formed immediately ahead of the crack tip . One estimate of the size of this damaged zone [ Eq . ( 3.5 ) ] finds the radius of a cylindrically shaped zone to be proportional to the square of the stress intensity factor ...
... zone of damage is formed immediately ahead of the crack tip . One estimate of the size of this damaged zone [ Eq . ( 3.5 ) ] finds the radius of a cylindrically shaped zone to be proportional to the square of the stress intensity factor ...
Page 115
... 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 material [ 121 , 122 ] . Also , the model is concerned with ...
... 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 material [ 121 , 122 ] . Also , the model is concerned with ...
Page 162
... zone . In this connection , the region of the fracture surface where strong color fringes are found , i.e. , in the mirror - mist transition region ( see Sec- tion 4.1 ) , serves to separate these two major sets of fatigue markings ...
... zone . In this connection , the region of the fracture surface where strong color fringes are found , i.e. , in the mirror - mist transition region ( see Sec- tion 4.1 ) , serves to separate these two major sets of fatigue markings ...
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