the main objective of this study is to drive a simple solution for prediction of steel fiber reinforced concrete (sfrc) behavior under four point bending test (fpbt). in this model all the force components at the beam section (before and after cracking) are formulated by applying these assumptions: a bilinear elastic-perfectly plastic stress-strain response for concrete behavior in compression,...

Constitutive modeling of clay is an important research in geotechnical engineering. It is difficult to use precise mathematical expressions to approximate stress-strain relationship of clay. Artificial neural network (ANN) and support vector machine (SVM) have been successfully used in constitutive modeling of clay. However, generalization ability of ANN has some limitations, and application of...

A new hyper-elastic formulation is proposed for improving the convergence of Mohr–Coulomb-like constitutive models at small stresses, when problems come from vicinity to apex yield surface and elastic predictor can lay in a region which not defined. The avoids stress states with tensile mean pressures provides shear bulk stiffnesses increasing square root stress, as typically occurs granular so...

Clastic soil is ubiquitous in practice but still poses a challenge for testing and modelling. Conventional laboratory tests with small sizes are not suitable the large grain size, while large-scale field often too costly time-consuming. In this paper, mechanical behaviour of clastic described by hypoplastic constitutive model based on numerical simulations considering both matrix breccia. The i...