By G. Pluvinage

ISBN-10: 1402016093

ISBN-13: 9781402016097

ISBN-10: 1402026129

ISBN-13: 9781402026126

A overwhelming majority of mess ups emanate from rigidity concentrators akin to geometrical discontinuities. The function of rigidity focus was once first highlighted via Inglis (1912) who supplies a tension focus issue for an elliptical illness, and later by way of Neuber (1936). With the growth in computing, it's now attainable to compute the true rigidity distribution at a notch tip. This distribution isn't really easy, yet seems like pseudo-singularity as in precept the ability dependence with distance is still. This distribution is ruled via the notch rigidity depth issue that's the root of Notch Fracture Mechanics. Notch Fracture Mechanics is linked to the volumetric technique which postulates that fracture calls for a actual quantity. on the grounds that fatigue additionally wishes a actual approach quantity, Notch Fracture Mechanics can simply be prolonged to fatigue emanating from a rigidity concentration.

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Extra resources for Fracture and Fatigue Emanating from Stress Concentrators

Example text

Tetelman. , (1968). ” Engineering Fracture Mechanics, Vol. 1, pp 191~211. 13 Tetelman. A. , McEvilly. , (1967). ’ John Wiley and Sons. 14 Xu. R. , Thompson. , Topper. T. , (1995). ‘Practical stress expressions for stress concentration regions’. Fatigue and Fracture of Engineering Materials and Structures, Vol. 18, N° 718, pp 885~895. 15 Lin K. , Pin. , (1980). ‘Singular finite elements for the fracture analysis of V notched plates’. International Journal for Numerical Methods in Engineering, Vol.

K From this system we can findO and c.

3 Stress distribution at notch tip for perfectly plastic material If we consider a rigid and perfectly plastic material, any point we consider in the direction of the maximum shear stress and draw a line which is always normal to the maximum shear direction. In a body which deforms plastically such a line represents the material flow. These lines are known as slip lines. Any lines which deviate from 45 °in the positive (anti-clockwise) sense of the maximum principal stress are called D lines. 5)..

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Fracture and Fatigue Emanating from Stress Concentrators by G. Pluvinage

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