Showing papers in "Theoretical and Applied Fracture Mechanics in 2012"

TL;DR: In this article, the 3D Finite Element method is applied to mixed fracture under anti-plane loading of a straight through-the-thickness crack in a linear elastic plate.

TL;DR: In this paper, the low-cycle fatigue (LCF) behavior of 34CrNiMo6 high strength steel was investigated systematically under fully-reversed strain-controlled conditions at room temperature.

TL;DR: In this paper, the microstructure evolution and stress distribution characteristics of a pre-cracked single crystal nickel at different temperatures are studied by molecular dynamics simulation, and the simulation results indicate that the crack propagation process and stress distributions characteristics are closely related to the change of temperature inducing the microstructures evolution ahead of a growing crack.

TL;DR: In this article, numerical simulation taking into account fluid-solid coupling interaction is conducted for the analysis on the dynamic responses of reinforced concrete containment under internal blast loading using LS-DYNA software, especially focusing on its damage mechanism.

TL;DR: In this article, the effect of T -stress on the critical mode I stress intensity factor of brittle and quasi-brittle materials was studied and the minimum strain energy density criterion was revisited to take the impact of T-stress into account and the results obtained were then compared with a series of experimental results reported for limestone.

TL;DR: In this paper, the authors considered the statistical inference on the generalized exponential distribution parameters in the presence of progressive Type-II censoring with random removals under PALT, where the number of units removed at each failure time has a binomial distribution.

TL;DR: In this paper, an elasto-plastic coupling solution was proposed for the prediction of displacements around circular openings in elastobittleplastic rock mass subject to hydrostatic stress and the restrictive condition between strength parameters and Young's modulus in post-failure region for rock materials was theoretically established.

TL;DR: In this paper, the performance of the AA2195-T8X at room temperature was investigated for fatigue crack growth and fracture toughness on T-L orientation, and the results for SN fatigue behaviour, fracture crack growth, and toughness of the studied alloy and its friction stir weldments presented high values compared with data found in the literature.

TL;DR: In this article, the authors present results of an experimental test and numerical investigation of reinforced concrete blocks' penetration resistance against a steel blunt-nose projectile with a diameter of 23mm and a mass of 175g with striking velocity about 980m/s hitting concrete blocks reinforced by different number of layers of woven wire steel mesh (Ferrocement).

TL;DR: In this article, the authors take advantage of the local strain energy density (SED) averaged on a control volume surrounding the tip of the middle notch and estimate the NSIF of each component by using a relatively coarse mesh.

TL;DR: In this paper, a 3D nonlinear thermal stress analysis model has been used to calculate thermal stress of the rail wheel for all applications in the braking load spectrum and the residual life of railway wheel under service conditions has also been predicted.

TL;DR: In this paper, the necessity of involving Al cladding as a means of protecting the aircraft aluminum alloy 2024 against corrosion has been assessed experimentally, and two different laboratory corrosion tests, namely the immersion of the alloy in a 3.5% NaCl solution, and the exfoliation corrosion test have been employed for pre-corroding the specimens.

TL;DR: In this article, the biaxial stress parallel to the free surface confined by zero or low confinement stress contributes to the parallel fracturing of spalling or slabbing in underground excavation.

TL;DR: In this paper, the softening and ratcheting behaviors of stainless steel 304L cylindrical shells under displacement control and force-control cyclic axial loading are studied.

TL;DR: In this paper, a new model that describes the relationship between tearing energy and fabrics' properties has been established and validated, and several plain and twill woven fabrics made of cotton, polyester/cotton blend and polyester are examined to evaluate the proposed model using tongue tear and tensile central crack tear tests.

TL;DR: In this article, the composite rod exhibits self-sharpening behaviors, and its matrix damages and fibers break are limited in a thin, narrow area, which is defined as "edge layer".

TL;DR: In this article, the averaged value of the strain energy density over a well-defined volume is used to assess the static strength of U-notched specimens under mixed mode loading (I+II).

TL;DR: In this article, the effects of cracks and joints on fracture of surrounding rock mass are studied for the underground caverns of Jinping I hydropower station, where growth of pre-existing cracks is parallel to the direction of maximum principal compressive stress or vertical to minimum principal tensile stress.

TL;DR: In this article, the authors investigated the effect of cross-anisotropic elastic parameters of deep rock mass on the zonal disintegration phenomenon and determined the number and size of fractured and non-fractured zones by using the Mohr-Coulomb criterion.

TL;DR: In this paper, the influence of the shape and angle of impact on the ballistic limit and failure mechanism of a steel target was studied. But the authors did not consider the effect of the angle of incidence on the failure mechanism.

TL;DR: In this article, strain localisation in the heat resistant nanocoated steel at the stage of cracks nucleation, coalescence, and fragmentation of the nanocoating is investigated experimentally.

TL;DR: In this paper, a simple constitutive model based on the augmented virtual internal bond (AVIB) method was developed, by which no separate fracture criterion is needed in simulating fracture propagation.

TL;DR: In this paper, the authors investigated the very process of crack transition across thermo-elastically mismatched layer interfaces and applied finite fracture mechanics (FFM) to tackle this problem.

TL;DR: In this article, a 14.5mm slip chamber gun was used to launch a spherical steel projectile with diameter of 6mm and the finite element code LS-DYNA 3D is used to simulate the penetration process, and the effects of layer number, thickness, combination state of the interface and strength of the plates on the antipenetration performance and damage mechanism were analyzed based on the results of experiment and numerical simulation.

TL;DR: In this paper, a mechanical model is proposed to investigate the zonal disintegration mechanism of cross-anisotropic rock masses around a deep circular tunnel subjected to dynamic unloading under hydrostatic pressure condition as well as the total elastic stress field distributions.

TL;DR: In this paper, an alternative approach based on the averaged strain energy density over a defined volume is applied in order to predict and thus potentially avoid clinical failures in ceramic pre-molar tooth crowns.

TL;DR: In this paper, the authors used the LS-DYNA software to simulate the behavior of a steel plate subjected to non-contact explosion by using an arbitrary-Lagrangian-Eulerian (ALE) algorithm.

TL;DR: In this paper, a non-destructive indentation technique is proposed to estimate fracture toughness of 0Cr12Mn5Ni4Mo3Al high strength stainless steel with different heat treatment conditions (RH520 and TH560) with a Berkovich indenter based on strain energy density.

TL;DR: In this article, the authors present the results of a study into methods for estimating the residual lifetime of the rail S-shape plate rail wheel due to cyclic mechanical loads and thermal loads.

TL;DR: In this paper, a high separation rate mode I dominated fracture test is performed on post mortem fractured surfaces with an optical microscope, which reveals characteristic features of mixed mode I/III fracture near the sides of the specimen but not in the middle.