## Deformation and fracture mechanics of engineering materialsUpdated to reflect recent developments in our understanding of deformation and fracture processes in structural materials. This completely revised reference includes new sections on isostress analysis, modulus of rupture, creep fracture micromechanicsms, and many more. |

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Page 329

There is an important connection between the

given in Figs. 8.7/2 and 8.7/'. Note that as a/2c approaches 0.5, Q approaches 2.5

, where \/\IQ equals 2/tt, which is the solution for an embedded circular flaw or a

semicircular surface flaw. An embedded elliptical or semielliptical surface flaw

will grow such that a/2c always increases to a limiting value of 0.5. (For the

semielliptical surface flaw, the equilibrium allc is closer to 0.36, because an

additional K ...

There is an important connection between the

**stress**-**intensity**correction**factors**given in Figs. 8.7/2 and 8.7/'. Note that as a/2c approaches 0.5, Q approaches 2.5

, where \/\IQ equals 2/tt, which is the solution for an embedded circular flaw or a

semicircular surface flaw. An embedded elliptical or semielliptical surface flaw

will grow such that a/2c always increases to a limiting value of 0.5. (For the

semielliptical surface flaw, the equilibrium allc is closer to 0.36, because an

additional K ...

Page 332

An approximate solution may be given by where a c t 1.12 3a Q ira sec— - 2t KA

~ 1.12(3a)vW2 (8-27) maximum stress-intensity condition along elliptical surface

at A depth of elliptical flaw half width of elliptical flaw plate thickness surface flaw

correction at A stress concentration effect at A elliptical flaw correction = f(a/2c)

finite panel width correction accounting for relatively large a/t ratio (recall Eq. 8-

22) At this point, it is informative to compare the

An approximate solution may be given by where a c t 1.12 3a Q ira sec— - 2t KA

~ 1.12(3a)vW2 (8-27) maximum stress-intensity condition along elliptical surface

at A depth of elliptical flaw half width of elliptical flaw plate thickness surface flaw

correction at A stress concentration effect at A elliptical flaw correction = f(a/2c)

finite panel width correction accounting for relatively large a/t ratio (recall Eq. 8-

22) At this point, it is informative to compare the

**stress**-**intensity factor**K and the ...Page 593

Weibull3 accounted for the stress and crack length dependence of the crack

growth rate by assuming the FCP rate to be dependent on the net section stress

in the component. Paris4 postulated that the

function of stress and crack length — was the overall controlling factor in the FCP

process. This postulate appears reasonable, since one might expect the

parameter K, which controlled static fracture (Chapter 8) and environment

assisted cracking ...

Weibull3 accounted for the stress and crack length dependence of the crack

growth rate by assuming the FCP rate to be dependent on the net section stress

in the component. Paris4 postulated that the

**stress intensity factor**— itself afunction of stress and crack length — was the overall controlling factor in the FCP

process. This postulate appears reasonable, since one might expect the

parameter K, which controlled static fracture (Chapter 8) and environment

assisted cracking ...

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User Review - all4metals - LibraryThingThis is one of the best textbooks on physical metallurgy. My preference is for Dieter's book, but that is because it was the textbook for my physical metallurgy course in graduate school. Hertzberg's book is more modern. Read full review

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addition alloy aluminum alloy applied stress associated ASTM atom behavior brittle Burgers vector ceramics Chapter component composite constant crack growth rate crack length crack propagation crack tip craze creep rate crystal crystalline curve cycles cyclic decrease depends elastic elastic modulus embrittlement engineering example failure fatigue crack fibers FIGURE flaw fracture mechanics fracture surface fracture toughness given grain boundary hardening increasing initial lattice load martensite material matrix maximum Metals Park microstructure modulus MPaVm notch Note occur oriented parameter particles phase plane-strain plastic deformation plastic zone plate polymer polymeric R. W. Hertzberg region relation relative Reprinted with permission response result rupture sample screw dislocation Section shear stress shown in Fig specimen stacking fault energy steel alloys strain rate strengthening stress concentration stress field stress intensity factor stress level stress-strain stress-strain curve superalloys thermal thickness Trans transition temperature twinning values yield strength