Results 61 to 70 of about 121 (98)

Mode I fracture analysis of granite under rapid thermal disturbances using digital image correlation and 3D laser scanning

Journal of Rock Mechanics and Geotechnical Engineering
With the advancement of clean energy technologies, granite, a common host rock in deep engineering, faces increasing challenges from rapid thermal disturbances.
Yongjun Chen, Kemeng Han, Tubing Yin, P.G. Ranjith, Xibing Li, Zhiqiang Yin   +5 more
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IMPACT OF HARDENING ON SLIGHTLY CURVED ELASTICITY-PLASTICITY CRACK TIP DISPLACEMENT UNDER QUASI-STATIC LOADS

Jixie qiangdu, 2015
In this article,elastic-plastic curved crack tip opening displacement in hardened material under quasi-static loads has been mainly studied,and curved crack tip opening displacement has been calculated as a practical application of a second order ...
YANG DaPeng, WANG JunJie, ZHAO Yao, LI TianYun, CHEN JianQiao   +4 more
doaj  

New fatigue crack growth law for 316L stainless steel based on plastic CTOD.

This thesis is concerned with a new low for describing the fatigue crack propagation on a 316L steel (austenitic stainless steel). A new methodology is presented based on the plastic contribution of the Crack-Tip Opening Displacement (CTODp). The CTODp is estimated from full-field displacement data measured with Digital Image Correlation (DIC).
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Fully plastic J and CTOD estimation procedure for circumferential surface cracks in biaxially loaded pipes.

, 2016
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Plastic CTOD as fatigue crack growth characterising parameter under variable amplitude loading by using DIC

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Dugdale plastic zone size and CTOD equations for the compact specimen

International Journal of Fracture, 1984
With the aim of applying the Dugdale model to the compact specimen, the equations for stress intensity factor and crack surface displacement are obtained for a pair of pin loads and a uniform stress acting on a segment of the crack surface. The plastic zone size is calculated from the 'finiteness' condition of Dugdale, and the results agree well with ...
Mall S, Newman J C, J C Newman
exaly   +2 more sources

Fatigue crack growth versus plastic CTOD in the 304L stainless steel

Engineering Fracture Mechanics, 2019
Abstract The plastic CTOD range, δp, which quantifies crack tip plastic deformation, is used to study fatigue crack propagation instead of the classical ΔK elastic parameter. A da/dN-δp model was defined for the 304L stainless steel. da/dN was obtained experimentally in standard CT specimens while δp was predicted numerically using the finite element
Pedro Prates, Ricardo Branco, F V Antunes   +2 more
exaly   +2 more sources

Measurements of CTOD and CTOA Around Surface-Crack Perimeters and Relationships Between Elastic and Elastic-Plastic CTOD Values

1990
A difficulty associated with predicting structural integrity is that the surface cracks found in structural components are three-dimensional whereas the crack-tip opening displacement (CTOD) and J-integral analytical techniques were derived from two-dimensional theory.
Wg Reuter
exaly   +2 more sources

Research on CTOD for low-cycle fatigue analysis of central-through cracked plates considering accumulative plastic strain

Engineering Fracture Mechanics, 2016
Abstract The plastic strain accumulation at the crack tips are used as controlling parameter to estimate cyclic CTOD for low-cycle failure analysis of the central-through cracked plate. The second order polynomial for the normalized CTOD defined as a function of the accumulative plastic strain, the ratio of mean stress to the yield stress, and the ...
Junlin Deng
exaly   +2 more sources

Specimen Thickness Effects for Elastic-Plastic CTOD Toughness of an A36 Steel

1988
This paper describes the results of an experimental and analytical study of the effect of specimen size on the fracture toughness behavior of A36 steel, primarily in the lower-transition region. This region is beyond the limits of plane strain as defined by ASTM Method E 399, but in the region where failure occurs prior to any macroscopic fibrous ...
GW Wellman, WA Sorem, RH Dodds, ST Rolfe
exaly   +2 more sources