... for evaluating microscale fracture mechanisms in bone and provide additional insight into the role of bone microstructure in controlling the microcrack growth trajectory. Another limitation of the model used in this study is related to the cohesive model parameter selection. The cohesive parameters used...

..., provided that crack-tip radii are accounted for properly. For microcracks with smaller crack-tip radii, however, cohesive stress action also needs to be included if accurate crack-tip stresses are to be obtained. For cracks with yet smaller crack-tip radii, cracks close and stresses throughout the crack...

...Patrizia Trovalusci; Valerio Varano; Giuseppe Rega A multifield continuum is adopted to grossly describe the dynamical behavior of composite microcracked solids. The constitutive relations for the internal and external (inertial) actions are obtained using a multiscale modeling based...

... for Bone ,” J. Biomech. 0021-9290 , 32 ( 10 ), pp. 1071 – 1079 . 10.1016/S0021-9290(99)00096-2 30 07 2008 13 02 2009 30 09 2009 biological tissues biomechanics bone elasticity failure (mechanical) finite element analysis fracture microcracks The fracture...

... Constitutive Model,” J. Mech. Phys. Solids, 56, pp. 3077–3100 ] that incorporates the contributions to the inelastic strain from both plasticity and microcracking. Before implementing the DE model, various comparisons with experimental measurements are required. Previously, the model has been successfully used...

...Bernhard Pichler; Luc Dormieux This paper deals with the dissipation associated with quasistatic microcracking of brittle materials exhibiting softening behavior. For this purpose an elastodamaging cohesive zone model is used, in which cohesive tractions decrease (during crack propagation...

... showed the transit of intergranular microcracks to transgranular microcracks with increasing shock loading. A failure wave in impacted ceramics is a continuous fracture zone, which may be associated with the damage accumulation process during the propagation of shock waves. Then a progressive fracture...

...Xiangqiao Yan This note can be regarded as a supplement of a paper entitled “On the Use of Approximation Methods for Microcrack Shilding Problems” ( H. Cai and K. T. Faber, 1992, ASME J. Appl. Mech. 59, 497–501 ). In this note, an effective approximation method for microcrack shielding problems...

... internal variables D . The unilateral effect due to microcrack closure in compression is introduced by generalizing the hypothesis of the complementary elastic energy equivalence. In the case of the permanent strain, a new term related to frozen energy, which is a function of the damage variable...

...N. D. Cristescu, Graduate Research Professor, Mem. ASME 15 03 2005 alumina powders brittleness microcracks fracture mechanics elasticity compressive testing hydrostatics In the article, the damage discussed is the microcracks existing in any brittle material...

... lattices, which simulate and capture the role of the disordered microstructure in damage process, substitute a polycrystal specimen assuming that microcracks are grain-boundaries cracks. The macroparameters of the system, in the form of algebraic functions, are obtained applying the Family–Vicsek scaling...

...Y.-Q. Zhang; H. Hao This paper presents a dynamic damage model for predicting fracture and fragmentation of brittle materials subjected to loads with high loading rates. This model is based on the mechanics of microcrack nucleation, growth, and coalescence to formulate the evolution of damage...

... of the paper itself in the ASME JOURNAL OF APPLIED MECHANICS . 07 March 2001 08 June 2001 lead alloys tin alloys soldering fatigue micromechanics crystal microstructure fracture mechanics microcracks percolation Solder connections in electronic packaging are expected...

... in the process. Meanwhile, the maximum tangential stress criterion and the maximum shear stress criterion are used to predict opening-mode and shear-mode crack initiations, respectively. By examining the model prediction and comparing it with experimental observations, it is shown that the observed microcracks...