## 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. &.7h and 8.7/'. Note that as allc approaches 0.5, Q approaches 2.5,

where y/l/Q 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 allc 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. &.7h and 8.7/'. Note that as allc approaches 0.5, Q approaches 2.5,

where y/l/Q 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 allc 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

Jsec~27 (8-27) where KA a c t 1.12 3a Q tra sec — 2t 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(allc) finite panel width correction accounting for

relatively large a/t ratio (recall Eq. 8-22) At this point, it is informative to compare

the

Chapter 7.

Jsec~27 (8-27) where KA a c t 1.12 3a Q tra sec — 2t 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(allc) 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 stress-concentration factor it, introduced inChapter 7.

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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This is a great book, not only work as a text book, but also a sophisticate reference book.

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addition aluminum alloy applied stress associated ASTM ASTM STP atoms behavior brittle Burgers vector ceramics Chapter Charpy component composite corrosion crack extension crack growth rate crack length crack tip creep crystal curve cycles cyclic decrease depends determined dislocation ductility elastic elastic modulus embrittlement engineering environment-assisted cracking example failure fiber FIGURE flaw fracture mechanics fracture surface fracture toughness given grain boundaries hydrogen increasing initial lattice load maraging steels martensite material material's matrix Metals microstructure modulus MPaVm notch Note occur oriented particles phase plane-strain plastic deformation plastic zone plate polymer properties R. W. Hertzberg region Reprinted with permission result sample screw dislocation Section shear stress shown in Fig solid specimen stacking fault energy steel alloys strain rate stress concentration stress field stress intensity factor stress level stress-strain stress-strain curve temper tensile thermal thickness toughening Trans transition temperature twin values yield strength