Results 81 to 90 of about 31,412 (196)

An extended finite element method with smooth nodal stress [PDF]

, 2013
The enrichment formulation of double-interpolation finite element method (DFEM) is developed in this paper. DFEM is first proposed by Zheng \emph{et al} (2011) and it requires two stages of interpolation to construct the trial function.
Bordas, S. P. A., Kulasegaram, S., Peng, X., Wu, S. C.   +3 more
core  

Cracks Cleave Crystals

, 2003
The problem of finding what direction cracks should move is not completely solved. A commonly accepted way to predict crack directions is by computing the density of elastic potential energy stored well away from the crack tip, and finding a direction of
Broberg K. B., Field J., M Marder, Ravi-Chandar K., Rice J. R., Slepyan L. I., Slepyan L. I.   +6 more
core   +2 more sources

The ab-initio aided strain gradient elasticity theory

Fracture 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 ( ).
Tomas Profant, Jaroslav Pokluda
doaj  

A multiple scales approach to crack front waves

, 2007
Perturbation of a propagating crack with a straight edge is solved using the method of matched asymptotic expansions (MAE). This provides a simplified analysis in which the inner and outer solutions are governed by distinct mechanics.
Andrew N. Norris, E Bouchaud, E Sharon, G Perrin, I. David Abrahams, J Fineberg, JD Achenbach, JR Rice, JR Willis, JR Willis, JR Willis, JW Morrissey, JW Morrissey, NV Movchan, O Obrezanova, O Obrezanova, S Ramanathan, S Woolfries, S Woolfries   +18 more
core   +2 more sources

A meshfree approach for analyzing strain fields near crack tips from Digital Image Correlation displacement data

Fatigue & Fracture of Engineering Materials & Structures
AbstractThe element‐free Galerkin (EFG) meshfree method is employed in this research to compute strain fields based on discrete displacement data obtained from digital image correlation (DIC). To validate the method's accuracy, both simulated images with highly heterogeneous deformations and real tests conducted on notched specimens with known ...
Giancarlo L. Gómez Gonzales, Alonso Camacho‐Reyes, Julián A. Ortiz González, Francisco A. Díaz   +3 more
openaire   +2 more sources

The dynamics of a shear band

, 2018
A shear band of finite length, formed inside a ductile material at a certain stage of a con- tinued homogeneous strain, provides a dynamic perturbation to an incident wave field, which strongly influences the dynamics of the material and affects its path
Bigoni, Davide, Capuani, Domenico, Giarola, Diana   +2 more
core   +1 more source

Quantitative Analysis of Crack Propagation Behavior in Recycled Concrete Subjected to Axial Compression Using Digital Image Correlation (DIC) Technology and Fractal Theory

Fractal and Fractional
The current research endeavors to explore the mechanical properties of recycled concrete cubic specimens, predominantly concentrating on macroscopic attributes such as compressive strength and splitting tensile strength. However, at the mesoscopic scale,
Cheng-Gong Lu, Xiu-Cheng Zhang, Wei-Zhi Chen, Xue-Fei Chen   +3 more
doaj   +1 more source

Study of the stress intensity factors in the bulk of the material with synchrotron diffraction [PDF]

, 2017
Artículo de Proceedings de Congreso Internacional Fatigue2017In this work we present the results of a hybrid experimental and analytical approach for estimating the stress intensity factor.
Buslaps, T, Lopez-Crespo, Pablo, Moreno-Morales, Maria Belen, Simpson, C, Vazquez-Peralta, J, Withers, P J   +5 more
core  

Growing Crack in a Viscoelastic Strip and Crack Tip Displacement Field Criterion

TRANSACTIONS OF THE JAPAN SOCIETY OF MECHANICAL ENGINEERS Series A, 1983
Akihiro MISAWA, Masahisa TAKASHI, Takeshi KUNIO   +2 more
openaire   +2 more sources

Use of optical techniques in the assment of the displacement field near the crack tip

, 2010
A crack tip represents a highly singular stress field existing in a structural component. The evaluation of the associate strain gradient is difficult using experimental discrete methods. An efficient alternative relies on optical methods which are non contact and give continuous information about displacements fields and its derivatives for strain ...
Ribeiro, J.E., Vaz, M.A.P., Lopes, Hernani, Melo, F.J.M.Q. de, Monteiro, Jaime M.   +4 more
openaire   +1 more source