A stress-strain history in the material of real concrete structures is usually unknown. An effect of concrete degradation is analyzed to describe how the initial degradation parameter can describe the stress-strain history. The idea is to introduce the initial damage of the structure by the degradation parameter to calculate the internal variables ...

By Dragan Rakić, Vladimir Dunić, Miroslav Živković, Nenad Grujović, Dejan Divac

The article proposed a general research scheme of heat transfer process in multilayer constructions for three basic geometric forms in order to simulate fire distribution. The scheme is based on linear differential equations, the Fourier method and the modified method of Eigen functions. The work considers five different layers’ design and do...

By Roman M. Tatsiy, Oleg Yu Pazen, Sergiy Ya. Vovk, Lubomyr Ya. Ropyak, Tetiana O. Pryhorovska

  Calendering is programmed finishing technique in the textile industry where the texture is squeezed between two or more rolls with a goal to obtain desired fragile quality, radiance and translucency. The essential guideline of calendering is to open the material to the joined impact of dampness, warmth and weight until the point texture gai...

By Neelam Gupta, Neel Kanth

The most important characteristics of the electrospun fibers are their internal morphology and their diameter. They both depend on polymer’s parameters, but also on the process parameters. The motivation for this research is therefore to simulate the jet during electrospinning and analyze the effects of some of the parameters on the jet (and ...

By Ilektra Ferouka, Tijana Šušteršič, Marko Živanović, Nenad Filipovic

In this paper, the behavior of a valveless, diaphragm-founded, piezoelectric micropump is studied and simulated. The nature of the piezoelectric actuator is a PZT-5H piezo-disk and the diaphragm is made of Silicon dioxide (SiO2). Applying Fluid-Structure Interaction (FSI) approach, the simulation for the valveless micropump is carried out in COMSOL...

By Toufik Barkat, Fatima Yohra Kadid, Mohammed Salah Aggoune, Rachid Abdessemed

The Hip resurfacing prosthesis is subjected to different stresses resulting from the different positions of the human walk, thereby generating dynamic stresses that vary with time, leading the implant material to fatigue failure. It is important to study the fatigue behavior of the prosthesis material and to ensure its long lifetime. We proposed a ...

By Karima Chergui, Hacene Ameddah, Hammoudi Mazouz

A generalization of the smeared concept for field problems, published in recent papers of the author and his collaborators, is presented in the paper. A composite smeared finite element CSFE is formulated. This generalization can serve as a theoretical background for further applications. A selected numerical example, related to convective-diffusiv...

By Milos Kojic

In this paper, we propose a method and a mathematical model for solving the problem of cargo transportation on a suspension rope by a bridge crane following a predetermined trajectory in the absence of uncontrollable pendulum sways. To this end, the principle of reduction of the second-order linearized differential equation, which describes sways i...

By Mikhail S. Korytov, Vitaly S. Shcherbakov

The present work reveals the examination of the characteristics of MHD free convective radiating fluid past a permeable plate with the occurrence of thermal transmission and heat source/sink along with changeable concentration and temperature. An exact solution has been employed by usual Laplace transform technique. The effects of diverse parameter...

By P. Chandra Reddy, M. C. Raju, G.S.S. Raju

In this paper, a numerical algorithm is presented to simulate the three-dimensional transient incompressible flow using a meshless local Petrov-Galerkin (MLPG) method. In the proposed algorithm, the forward finite difference (FFD) and MLPG methods are employed for discretization of time derivatives and solving the Poisson equation of the pressure, ...

By Mohammad Javad Mahmoodabadi, F Mahmoodabadi, Meysam Atashafrooz