A brittle fracture criterion for PMMA V-notches tensile specimens based on a length-enriched eXtended Finite Element approach

Benvenuti, E.; Tovo, R.; Livieri, P.
July 2011
Frattura e Integrita Strutturale;2011, Vol. 5, p23
Academic Journal
A criterion for the prediction of the static failure loads in tensile PMMA specimens with sharp notches is presented. The proposed criterion is based on a regularized version of the eXtended Finite Element Method (XFEM), which has been previously applied to concrete-like materials. The main feature of the proposed approach is that the cracking process is not treated as a local process, but it is modeled by assuming that macro-cracks stem from the interaction of micro-cracks within a finite width process zone. The case of a brittle materials with thin process zone is tackled by assuming one layer of enriched finite elements. Preliminary results concerning PMMA specimens subjected to mode-one loading are presented.


Related Articles

  • Plastic deformation in sheet metal including multi-size voids. Nakayama, Yasuhide; Naka, Tetsuo; Shimizu, Ichiro // AIP Conference Proceedings;1/17/2011, Vol. 1315 Issue 1, p98 

    In the plastic deformation of damaged materials, the influence of distribution of voids on the mechanical properties is an important issue. Therefore, it is necessary to control the void growth. As various sizes of voids are actually distributed in a damaged material, we have to evaluate the...

  • Stress Intensity Factors for Surface Cracks in Round Bars Under Combined Bending and Torsion Loadings. Ismail, A. E.; Ariffin, A. K.; Abdullah, S.; Ghazali, M. J. // International Review of Mechanical Engineering;Nov2010, Vol. 4 Issue 7, p827 

    Stress intensity factor (SIF) calculations for semi-elliptical surface crack in round bars subjected to a combined loading using a three-dimensional finite element (FE) model was numerically presented. Different crack aspect ratio, a/b ranging between 0.0 to 1.2 and relative crack depth, a/D is...

  • A hybrid experimental/numerical technique to extract cohesive fracture properties for mode-I fracture of quasi-brittle materials. Gain, Arun; Carroll, Jay; Paulino, Glaucio; Lambros, John // International Journal of Fracture;Jun2011, Vol. 169 Issue 2, p113 

    We propose a hybrid technique to extract cohesive fracture properties of a quasi-brittle (not exhibiting bulk plasticity) material using an inverse numerical analysis and experimentation based on the optical technique of digital image correlation (DIC). Two options for the inverse analysis were...

  • Pore-crack orientation effects on fracture behavior of brittle porous materials. Keleş, Özgür; García, R.; Bowman, Keith // International Journal of Fracture;Jun2014, Vol. 187 Issue 2, p293 

    Mechanical behavior of two-dimensional microstructures containing circular pores were simulated under uniaxial and biaxial loading using the finite element method. Resulting stress distributions were combined with classical fracture mechanics to investigate fracture behavior of brittle porous...

  • Design life assessment of the blade root of a gas turbine unit under thermomechanical loading. Bazhenov, V.; Gulyar, A.; Piskunov, S.; Andrievskii, V. // Strength of Materials;May2013, Vol. 45 Issue 3, p329 

    The semianalytic finite element method with the use of approaches of continuum fracture mechanics was employed to assess the design life of the blade root of a gas turbine unit under thermomechanical loading. The results of computations, obtained with two- and three-dimensional problems, were...

  • Generalized crack closure analysis for elements with arbitrarily-placed side nodes and consistent nodal forces. Nairn, John // International Journal of Fracture;Sep2011, Vol. 171 Issue 1, p11 

    A new approach was developed for the evaluation of energy release rate by the virtual crack closure technique in quadratic and linear elements. The generalized method allows arbitrary placement of the side nodes for quadratic elements and thus includes both standard elements, with mid-side...

  • Evaluation of stress intensity factor of multiple inclined cracks under biaxial loading. Bhagat, R. K.; Singh, V. K.; Gope, P. C.; Chaudhary, A. K. // Frattura e Integrita Strutturale;2012, Vol. 6, p5 

    A finite rectangular plate of unit thickness with two inclined cracks (parallel and non parallel) under biaxial mixed mode condition are modelled using finite element method. The finite element method is used for determination of stress intensity factors by ANYSIS software. Effects of crack...

  • Application of the Beremin Model for Cruciform Specimen to Determine the Fracture Probability in Case of WPS. Beleznai, R.; Szavai, Sz. // Strength of Materials;Jul2013, Vol. 45 Issue 4, p489 

    Based on large-scale experimental tests performed on cruciform specimens made of French type RPV steel, the warm prestressing (WPS) effect for LCF (load-cool-fracture) and LCTF (load-cool-transient-fracture) load cycles is studied by finite element simulation. The modified Beremin model is used...

  • 763. Analysis of damage characteristics for cracked composite structures using spectral element method. Hu Sun; Li Zhou // Journal of Vibroengineering;Mar2012, Vol. 14 Issue 1, p430 

    Structural health monitoring of composites, due to their wide use, has attracted more attention. It is essential to study variations of structural dynamic characteristics caused by the damage. A cracked spectral element model is developed to study dynamics of cracked composite structures. Taking...


Read the Article


Sorry, but this item is not currently available from your library.

Try another library?
Sign out of this library

Other Topics