## Fatigue of engineering plastics |

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Page 115

The Dugdale model supposes that the plastic strip is in the plane of the crack and

bears a uniform stress equal to the

the model is concerned with conditions of plane stress where az = 0 (see Fig.

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 conditions of plane stress where az = 0 (see Fig.

Page 148

That is, the plane of the crack assumes a +45° angle relative to the stress axis

and component thickness. ... where the shear lip was measured, and the

material's

associated ...

That is, the plane of the crack assumes a +45° angle relative to the stress axis

and component thickness. ... where the shear lip was measured, and the

material's

**yield strength**<Tys, Eq. (4.2) can be used to estimate the stress levelassociated ...

Page 168

zone model. Furthermore, if we assume that crack tip yielding occurs by crazing (

at least in the amorphous polymers), the inferred

**yield strength**at different K levels by computations based on the Dugdale plasticzone model. Furthermore, if we assume that crack tip yielding occurs by crazing (

at least in the amorphous polymers), the inferred

**yield strength**computed from ...### What people are saying - Write a review

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### Contents

Fatigue Crack Propagation | 74 |

Fatigue Fracture Micromechanisms in Engineering Plastics | 146 |

Composite Systems | 184 |

Copyright | |

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### Common terms and phrases

adhesive amplitude ASTM ASTM STP Beardmore Bucknall carbon cfrp component Composite Materials composites constant crack growth rates crack length crack tip craze crystalline cyclic loading da/dN decrease deformation discontinuous growth bands discussed ductile 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 laminates loading cycles M. D. Skibo material matrix mean stress 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 shown in Fig specimen spherulite static stress intensity factor stress level striation studies temperature rise tensile test frequency thermal failure tion toughening unnotched values viscoelastic yield strength