Describing the moment rotation (M/θ) behavior of reinforced concrete (RC) hinges is essential in predicting the behavior of RC structures under severe loadings, such as under cyclic earthquake motions and blast loading. The behavior of RC hinges is defined by localized slip or partial interaction (PI) behaviors in both the tension and compression region. In the tension region, slip between the ...

numerical methods such as boundary element and finite element methods are widely used for the stress analysis in solid mechanics. this study presents boundary element method based on the displacement discontinuity formulation to solve general problems of interaction between hydraulic fracturing and discontinuities. the crack tip element and a higher order boundary displacement collocation techn...

Criteria for progressive debonding at the fiber/mattix interface with friction along the debonded interface are considered for fiber-reinfoxed ceramic composites. The energy-based criterion is adopted to analyze the debond length, the crack-opening displacement, and the displacement of the composite due to interfacial debonding. The analytical solutions are identical to those obtained from the ...

By using an analog of the δc -model, we reduce problem stressed state and limit equilibrium inhomogeneous shell revolution weakened by internal crack any configuration with plastic strains developed on continuation in form a narrow strip to elastic problem. The indicated is then reduced system singular integral equations unknown limits integration discontinuous functions right-hand sides. We pr...

Abstract This paper presents experimental verification of indirect tests for the determination stress-crack opening curve concrete, based on method described in RILEM TC 187-SOC report and submitted to ACI Committee 446 Fracture Toughness Testing Concrete, which relies standard cohesive model. In such method, a bilinear approximation softening is determined from three-point bending notched spec...

Crack propagation of PMMA in some liquid environments is described for various testing conditions, such as fixed load, fixed displacement and monotonically increasing displacement. Fracture mechanics concepts have been used successfully in analysing the results. When continuous stable cracking is achieved, values of fracture toughness (R) for PMMA under these loading conditions are obtained as ...