Fatigue of Engineering Plastics |
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Page 17
... crystalline polymers such as polyethylene , fracture may be delayed due to an orientation of the molecules ( analogous to strain hardening in metals ) and the stress may actually increase , as shown in region VI . Not surprisingly , the ...
... crystalline polymers such as polyethylene , fracture may be delayed due to an orientation of the molecules ( analogous to strain hardening in metals ) and the stress may actually increase , as shown in region VI . Not surprisingly , the ...
Page 131
... crystalline polymers relative to amorphous structures is not accidental . As pointed out by Koo et al . [ 161 , 162 ] and by Meinel and Peterlin [ 163 ] , crystalline polymers not only can dissipate energy when crystallites are deformed ...
... crystalline polymers relative to amorphous structures is not accidental . As pointed out by Koo et al . [ 161 , 162 ] and by Meinel and Peterlin [ 163 ] , crystalline polymers not only can dissipate energy when crystallites are deformed ...
Page 132
... crystalline material cannot melt , and the growth per cycle is significantly reduced . Thus , a permanently crystalline polymer might be expected to behave in a similar fashion . This point was discussed in Section 3.7 and illustrated ...
... crystalline material cannot melt , and the growth per cycle is significantly reduced . Thus , a permanently crystalline polymer might be expected to behave in a similar fashion . This point was discussed in Section 3.7 and illustrated ...
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