Initial shear stress is inevitable in actual engineering slopes, subgrades and foundations. The soils exhibit different dynamic characteristics under an initial stress. strength of saturated clay cyclic loading were studied through a triaxial test remoulded the Wenchuan area. effects failure criterion, vibration frequency on also analysed. results showed that strain criterion with value 2.5 % o...

Damage constitutive models based on micromechanical formulation and combination of micromechanical and macromechanical effects are presented to predict progressive damage in aligned and random fiber reinforced composites. To estimate the overall elastoplastic damage responses, an effective yield criterion is derived based on the ensemble-volume averaging process and the first-order effects of e...

Based on the microscopic structure of fiber-reinforced composite materials, a finite element analysis model was developed using LS-DYNA software to simulate damage carbon-ceramic brake discs under high-speed foreign particles impact conditions. The incorporated Chang-Chang failure criterion intra-layer and introduced material stiffness reduction scheme investigate process mechanism discs. resul...

The relevance of the phase-field approach to simulate fracture in porous ceramics has been investigated. For this purpose, conditions for crack initiation using model have compared theoretical predictions coupled criterion considering a pure V-notch singularity and blunted by cavity. two types (3YSZ 8YSZ), it shown that is able accurately nucleation as predicted stress-energy criterion. nature ...

in this paper, a crack localization method for euler-bernoulli beams via an efficient static data based indicator is proposed. the crack in beams is simulated here using a triangular variation in the stiffness. static responses of a beam are obtained by the finite element modeling. in order to reduce the computational cost of damage detection method, the beam deflection is fitted through a poly...

results of damage prediction in buildings can be used as a useful tool for managing and decreasing seismic risk of earthquakes. in this study, damage spectrum and c4.5 decision tree algorithm were utilized for damage prediction in steel buildings during earthquakes. in order to prepare the damage spectrum, steel buildings were modeled as a single-degree-of-freedom (sdof) system and time-history...

Abstract Aiming at the typical delamination damage mode of fiber-reinforced composites, constitutive model and failure criterion composites that commonly used in dynamic simulation are studied, principles characteristics cohesive element tiebreak contact algorithm analyzed.Then calculation two composite targets anti penetration is take as an example,The accuracy verified respectively, protectio...

A new failure criterion was presented to predict the ultimate strength of shale under the triaxial and polyaxial state of stress. A database containing 93 datasets was obtained from the results of the uniaxial, triaxial, polyaxial compressive tests, an indirect tensile test was collected from reliable references, and this test was carried out on the shale samples taken from the southwestern oil...