Fatigue of Engineering Plastics |
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Page 87
... modulus E being reported over several decades of test frequency [ 51–53 ] . Even semicrystalline polymers show relatively small time - dependent changes in modulus below T , [ 54 ] . To further clarify this point , additional tests were ...
... modulus E being reported over several decades of test frequency [ 51–53 ] . Even semicrystalline polymers show relatively small time - dependent changes in modulus below T , [ 54 ] . To further clarify this point , additional tests were ...
Page 192
... Modulus and Creep . As expected ( Fig . 5.6 ) , the modulus of a rubbery phase - glassy matrix composite is decreased in proportion to the volume fraction of rubbery phase [ 17 ] . Clearly the effect of this is to lower the con- straint ...
... Modulus and Creep . As expected ( Fig . 5.6 ) , the modulus of a rubbery phase - glassy matrix composite is decreased in proportion to the volume fraction of rubbery phase [ 17 ] . Clearly the effect of this is to lower the con- straint ...
Page 245
... modulus essentially to a steady - state stage II ; this was associated with the propagation of surface flaws on the fibers ( following significant damage on the first half - cycle ) . The drop in modulus , which was also reflected in ...
... modulus essentially to a steady - state stage II ; this was associated with the propagation of surface flaws on the fibers ( following significant damage on the first half - cycle ) . The drop in modulus , which was also reflected in ...
Contents
Fatigue Crack Propagation | 74 |
Fatigue Fracture Micromechanisms in Engineering Plastics | 146 |
Composite Systems | 184 |
Copyright | |
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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