Fracture of a textured anisotropic ceramic

Fracture toughness anisotropy in granitic rocks

“…The effect of microcrack orientation on fracture toughness of textured ceramics [9] and layered microstructures and composites has been increasingly recognized as an important property [5]. In the former study, strength decreased with increasing degree of texturing due to favorably oriented mesocracks, and the anisotropic fracture properties were related to interactions between the test crack and the population of mesocracks.…”

“…The study concluded, as expected, that the fracture toughness was higher when measured orthogonal to bedding plane and was lowest for cracks propagating along the bedding plane. The role of crystallographic texture in determining the fracture toughness anisotropy in ceramics has also been investigated [9]. In a separate investigation [10] creation of a significant fracture process zone surrounding a propagating main crack in a large chevron cracked notched Brazilian disc (CCNBD) specimen (diameter ¼ 20 cm) of Lac du Bonnet granite using acoustic emission techniques was reported.…”

Microstructure-based modelling and experimental investigation of crack propagation in glass–alumina functionally graded materials

“…22 Zimmermann et al used OOF in order to model the fracture mechanism in textured anisotropic ceramic systems. 23 Vedula et al modelled the residual stress distribution and spontaneous crack propagation, which may be caused in a polycrystalline alumina by a temperature decrease. 24 Saigal et al analyzed the microcrack propagation in iron titanate 25 and the distribution of internal stresses in aluminum-silicon alloys.…”

Characterizing and Modeling Mechanical Properties of Nanocomposites-Review and Evaluation

“…Thus the mesh reproduces exactly the original microstructure, namely the inclusions size, morphology, spatial distribution, and the respective volume fraction of the different constituents. A objectoriented finite element code, OOF [205,206], developed by National Institute of Standards and Technology (NIST), has been extensively used in analyzing fracture mechanisms and material properties of heterogeneous materials [207][208][209][210][211][212][213][214][215][216] and mechanical properties of nanocomposites Vol.9,No.4 Characterizing and Modeling Mechanical Properties of Nanocomposites 295 [8,178,179,217]. In the following, a 2D object-oriented finite element modeling will be discussed, followed by a 3D modeling.…”