## Mechanical metallurgy |

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Page 194

Griffith proposed that a brittle material contains a population of fine

produce a stress concentration of sufficient magnitude so that the theoretical

cohesive strength is reached in localized regions at a nominal stress which is

well ...

Griffith proposed that a brittle material contains a population of fine

**cracks**whichproduce a stress concentration of sufficient magnitude so that the theoretical

cohesive strength is reached in localized regions at a nominal stress which is

well ...

Page 195

distribution for an elliptical

energy results from the formation of a

plate thickness is equal to Um = - (7-8) where a is the tensile stress acting normal

...

distribution for an elliptical

**crack**was determined by Inglis.1 A decrease in strainenergy results from the formation of a

**crack**. The elastic strain energy per unit ofplate thickness is equal to Um = - (7-8) where a is the tensile stress acting normal

...

Page 198

This is essentially a macroscopic theory that is concerned with

tenths of an inch in length or greater. The quant it y of interest is the

extension force, also called the strain-energy release rate. The

force 9, ...

This is essentially a macroscopic theory that is concerned with

**cracks**that aretenths of an inch in length or greater. The quant it y of interest is the

**crack**-extension force, also called the strain-energy release rate. The

**crack**-extensionforce 9, ...

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### Contents

Introduction | 3 |

Stress and Strain Relationships for Elastic Behavior | 17 |

Elements of the Theory of Plasticity | 54 |

Copyright | |

21 other sections not shown

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### Common terms and phrases

alloys angle annealing ASTM axis behavior bending billet brittle fracture Burgers vector cent compressive constant crack creep rate cycles decrease determined diameter direction dislocation line distribution drawing ductile edge dislocation effect elastic equation extrusion factor failure fatigue limit flow curve flow stress force forging forming friction given grain boundaries hardness high-temperature increase indentation lattice length load longitudinal mandrel martensite material maximum measured mechanical metallurgical Metals Park method modulus notch obtained occurs orientation particles plastic deformation pressure principal stresses Proc produced properties punch quenched radius ratio region relationship residual stresses rolling screw dislocations shear stress sheet shown in Fig shows single crystals slip plane Society for Metals specimen steel strain energy strain hardening strain rate stress-strain curve structure surface temper tensile strength tensile stress tension theory thickness tion torsion Trans transition temperature tube usually yield strength yield stress