Results 41 to 50 of about 31,412 (196)

3D Digital Volume Correlation of Synchrotron Radiation Laminography images of ductile crack initiation: An initial feasibility study

open access: yes, 2013
International audienceA feasibility study of measuring 3D displacement fields in the bulk during ductile crack initiation via combined Synchrotron Radiation Computed Laminography (SRCL) and Digital Volume Correlation (DVC) is performed.
Helfen, Lukas   +3 more
core   +3 more sources

Scattering of flexural waves by a semi-infinite crack in an elastic plate carrying an electric current [PDF]

open access: yes, 2011
Copyright @ 2011 Sage Publications LtdSmart structures are components used in engineering applications that are capable of sensing or reacting to their environment in a predictable and desired manner.
Abrahams, ID, Lawrie, JB
core   +1 more source

Characterisation of crack tip fields under non-uniform fatigue loading [PDF]

open access: yesFracture and Structural Integrity, 2013
The paper analyses previously reported work, which uses digital image correlation to measure fatigue crack closure. As well as determining crack opening loads, the information on crack shape may be used to estimate the stress intensity factor, as well ...
D. Nowell, M.E. Kartal, P.F.P. de Matos
doaj   +1 more source

Numerical implementation of the eXtended Finite Element Method for dynamic crack analysis [PDF]

open access: yes, 2008
A numerical implementation of the eXtended Finite Element Method (X-FEM) to analyze crack propagation in a structure under dynamic loading is presented in this paper.
Caperaa, Serge   +2 more
core   +2 more sources

Experimental and Computational Evaluation of Crack-tip Displacement Field and Transformation Zone in NiTi

open access: yesMaterials Today: Proceedings, 2015
Abstract Mechanical properties of NiTi shape memory alloy (SMA) were obtained using uniaxial tensile testing and dog-bone specimens. Critical crack tip opening displacement (CTOD) was measured at room temperature on compact tension (CT) specimens using experimental methods of elastic-plastic fracture mechanics (EPFM).
Shafaghi, N.   +3 more
openaire   +1 more source

High magnification crack-tip field characterisation under biaxial conditions [PDF]

open access: yesFracture and Structural Integrity, 2013
This work presents a novel methodology for characterising fatigue cracks under biaxial conditions. The methodology uses high magnification Digital Image Correlation (DIC) technique for measuring displacement and strain crack-tip fields. By applying micro-
B. Moreno, P. Lopez-Crespo, J. Zapatero
doaj   +2 more sources

A Continuum Theory of Crack Shielding in Ceramics [PDF]

open access: yes, 1987
A phenomenological constitutive model is proposed which aims at describing the overall effect of microfracture in ceramics. Based on this model, the asymptotic stress, strain, and displacement fields at the tip of a stationary macroscopic crack are ...
Ortiz, M.
core  

Approximation of the crack-tip field in fatigue cracks in bridge steel specimens: DIC analysis of different constraint levels

open access: yesFracture and Structural Integrity, 2019
A study on the accuracy of the approximation of the displacement field around of crack tip in a sample made from bridge steel (S355) is main objective of contribution.
S. Seitl   +5 more
doaj   +3 more sources

The ab-initio aided strain gradient elasticity theory: a new concept for fracture nanomechanics

open access: yesFracture and Structural Integrity, 2019
When the width of cracked nanocomponents made of brittle or quasi-brittle materials is less than approximately , the size of the - dominance zone becomes smaller than and comparable to the fracture process zone ( ).
Tom� Profant, Jaroslav Pokluda
doaj   +1 more source

The 1/r singularity in weakly nonlinear fracture mechanics

open access: yes, 2009
Material failure by crack propagation essentially involves a concentration of large displacement-gradients near a crack's tip, even at scales where no irreversible deformation and energy dissipation occurs. This physical situation provides the motivation
Ariel Livne   +25 more
core   +1 more source

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