By V.V. Panasyuk, M.C. Pandey, O.Ye. Andreykiv, J.F. Knott, P. Rama Rao, R. O. Ritchie and D.M.R. Taplin (Eds.)

ISBN-10: 008042256X

ISBN-13: 9780080422565

ISBN-10: 0080983731

ISBN-13: 9780080983738

The eighth foreign convention on Fracture (ICF8), held in Kyiv, Ukraine, attracted 550 delegates from 30 international locations with over seven hundred papers offered. This quantity incorporates a consultant choice of seventy two articles of the top general from the world over popular specialists within the box. vital themes lined comprise: mechanics and standards of fracture, stress-strain research in solids with cracks, physics and Read more...

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Extra resources for Advances in Fracture Resistance and Structural Integrity

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For p o w e r - l a w h a r d e n i n g materials, t h e p a r a m e t e r s Κ a n d G c a n n o t be a p p l i e d a n d t h e v a l u e of M d e p e n d s o n t h e d e f i n i t i o n of t h e s t r e s s / s t r a i n relationship: Gy is usually replaced by a reference flow stress σο. A g a i n , s t a n d a r d p r o c e d u r e s are available for the m e a s u r e m e n t of C T O D . In both J-tests a n d C T O D - t e s t s , t h e s e q u e n c e of e v e n t s is often that the crack b e g i n s to e x t e n d by fibrous m e c h a n i s m s (void c o a l e s c e n c e or fast s h e a r ) .

For p o w e r - l a w h a r d e n i n g materials, t h e p a r a m e t e r s Κ a n d G c a n n o t be a p p l i e d a n d t h e v a l u e of M d e p e n d s o n t h e d e f i n i t i o n of t h e s t r e s s / s t r a i n relationship: Gy is usually replaced by a reference flow stress σο. A g a i n , s t a n d a r d p r o c e d u r e s are available for the m e a s u r e m e n t of C T O D . In both J-tests a n d C T O D - t e s t s , t h e s e q u e n c e of e v e n t s is often that the crack b e g i n s to e x t e n d by fibrous m e c h a n i s m s (void c o a l e s c e n c e or fast s h e a r ) .

A n u m b e r of m a c r o s c o p i c m i x e d - m o d e failure criteria have b e e n p r o p o s e d : for e x a m p l e , that a critical value of strain e n e r g y should be attained: G i + G n = Κ ι / Ε ' + Κ / μ = constant (30) 2 2 π or that a critical tensile stress s h o u l d be a c h i e v e d : direction Θ, so that this is m a x i m i s e d along a ΚΘΘ = K i f i (Θ) + Knf (9) = constant (31 ) 2 For brittle fractures in P M M A , oolitic limestone a n d steel at 7 7 K , t h e m a x i m u m t e n s i l e s t r e s s criterion h o l d s a n d t h e c r a c k d e v i a t e s to run n o r m a l to t h e m a x i m u m tensile stress ( M a c c a g n o a n d Knott, 1991).

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Advances in Fracture Resistance and Structural Integrity by V.V. Panasyuk, M.C. Pandey, O.Ye. Andreykiv, J.F. Knott, P. Rama Rao, R. O. Ritchie and D.M.R. Taplin (Eds.)


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