Fatigue of Engineering Plastics |
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Page 43
... limit ( ~ 6 MPa ) ( the endurance limit is considered to be the stress level below which fatigue failure is not observed ) , the polymer heated up to the point of melting as shown in the temperature rise curves A , B , C , D , and E ...
... limit ( ~ 6 MPa ) ( the endurance limit is considered to be the stress level below which fatigue failure is not observed ) , the polymer heated up to the point of melting as shown in the temperature rise curves A , B , C , D , and E ...
Page 52
... limits of deflections or extensions . Various coil and leaf springs , shoe soles , and components subjected to thermal cycling represents examples of components loaded in this manner . Furthermore , it is possible to identify components ...
... limits of deflections or extensions . Various coil and leaf springs , shoe soles , and components subjected to thermal cycling represents examples of components loaded in this manner . Furthermore , it is possible to identify components ...
Page 130
... limits , the 50 % RH sample would experi- ence greater cyclic strains and , therefore , more damage per cycle than the dry specimens . For this reason , the nylon 66 samples equilibrated at 50 % RH would be expected to exhibit inferior ...
... limits , the 50 % RH sample would experi- ence greater cyclic strains and , therefore , more damage per cycle than the dry specimens . For this reason , the nylon 66 samples equilibrated at 50 % RH would be expected to exhibit inferior ...
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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 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