USER INTERFACES CAD SOFTWARE FOR PRE- AND POST- PROCESSING OF MODELS ACCOMPANYING PAK FE CODE
This paper introduces the CAD user interface software developed to support example-driven simulations using the PAK finite element code. Built upon years of research and development by the authors, CAD represents a custom-built platform for three-dimensional model setup and result visualization, tightly integrated with the PAK solver. It facilitate...
By Miljan Milošević, Vladimir Simić, Bogdan Milićević, Velibor Isailović, Vladimir Ranković, Miloš Ivanović, Žarko Milošević, Dalibor Nikolić, Danko Milašinović, Arso Vukićević, Lazar Otašević, Mileta Stojanović, Nenad Filipović, Miloš Kojić, Boban Stojanović
OUR MULTISCALE FINITE ELEMENT MODEL OF GROUNDWATER FLOW TO RADIAL WELL
A water supply system with radial wells (RWs) extends usually over tens of kilometers horizontally and tens of meters deep within the soil. Water flows through the soil and then through several lateral screens to the vertical shaft. Lateral screens represent perforated pipes with lengths in meters and diameters measured in centimeters. A common app...
By Vladimir Ranković, Nenad Filipović, Boban Stojanović, Velibor Isailović, Miloš Kojić
MECHANICS OF LUNG MICROSTRUCTURE AS A BASIS FOR LUNG MECHANICS, AND MULTISCALE-MULTIPHYSICS MODEL OF LUNG MECHANICS, AIRFLOW, BLOOD FLOW, AND DIFFUSION
This paper contains two parts – the first is related to the mechanics of lung microstructure, and the second is a formulation of a multiscale-multiphysics model of the lung. The second part considers the entire lung that relies on the mechanics of the microstructure and recently developed a multiscale composite finite element of the lung tiss...
By Miloš Kojić, Ivo Vlastelica, Boban Stojanović, Vladimir Ranković, Akira Tsuda
MUSCLE MODELING IN THE FINITE ELEMENT SOLVER PAK
This paper presents the integration of muscle fatigue modeling into the finite element solver PAK, based on an extended version of Hill’s phenomenological model. While traditional muscle models focus primarily on force generation, this study incorporates fatigue dynamics to provide a more realistic representation of muscle performance over ti...
By Boban Stojanović, Miloš Kojić, Srboljub Mijailovich
OVERVIEW OF SURROGATE MODELING FOR HUXLEY-TYPE MUSCLE SIMULATIONS IN CARDIAC BIOMECHANICS
Huxley-type muscle models offer a physiologically grounded description of cardiac contraction but remain computationally prohibitive for large-scale, multi-scale simulations. This article reviews surrogate modeling strategies that alleviate these costs for ventricular biomechanics, with emphasis on data-driven (RNN/TCN/GRU) and physics-informed (PI...
By Bogdan Milićević, Miloš Ivanović, Boban Stojanović, Miljan Milošević, Miloš Kojić, Nenad Filipović