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
NUMERICAL HOMOGENIZATION AS A METHOD FOR MODELING CONSTRAINED DIFFUSION
Material transport by diffusion is present in nature, as well as in living organisms as a vital process. The basic and generally used is a phenomenologically established law, named Fick’s law, It states that the material flux is proportional to the concentration gradient and that the material flows from the higher to lower concentration. Howe...
By Miloš Kojić, Miljan Milošević, Alessandro Grattoni, Mauro Ferrari
FATIGUE TO FRACTURE INTEGRITY ASSESSMENT IN ENGINEERING AND BIOMEDICAL ENGINEERING
Degradation of structural integrity and fatigue life estimation remain critical challenges in engineering, including biomedical applications. Fracture mechanics and crack propagation prediction are highly sensitive to material parameters, with the Stress Intensity Factor being the most significant physical parameter for the estimation of crack stre...
By Gordana Jovičić, Vladimir Milovanović, Aleksandra Vulović, Miroslav Živković, Nenad Đorđevič, Nenad Filipović
OVERVIEW OF EXPLICIT AND IMPLICIT DYNAMIC FEM ANALYSIS IN PAK SOFTWARE
Dynamic analysis of engineering structures is essential in the design process, providing insights into their behavior under various loading conditions. This paper focuses on the comparative study of implicit and explicit dynamic analysis methods using the PAK software and FEMAP with the Nastran software. Both methods have distinct advantages and di...
By Vladimir Dunić, Miloš Pešić, Miroslav Živković, Radovan Slavković
FROM CARDIOMYOPATHY TO HEART FAILURE: INSIGHTS FROM COMPUTATIONAL MODELS OF LEFT HEART VENTRICLE
This study presents the use of computational modeling to improve understanding of hypertrophic cardiomyopathy (HCM) and its progression to heart failure. A review of related work highlights advances and challenges in computational modeling and integration of clinical data for model development and validation. Using parametric model of the left hear...
By Smiljana Tomašević, Bogdan Milićević, Miljan Milošević, Nenad Filipović
FINITE ELEMENT ANALYSIS OF FEMORAL BONE UNDER VARYING BONE DENSITY CONDITIONS
Understanding the biomechanical response of a femoral bone under physiological loads is critical for assessing bone health and fracture risk, particularly in aging populations affected by osteopenia and osteoporosis. This study investigates the mechanical behavior of the femoral bone under standing loading conditions across three bone states: healt...
By Aleksandra Vulović, Gordana Jovičić, Nenad Filipović
PROJECT RISKS DURING THE COVID-19 PANDEMIC AND THEIR EFFECTS ON DELAYS AND COST OVERRUNS
The COVID-19 pandemic has significantly impacted project implementation costs and caused delays across numerous industries. Various analysis found in the literature show that the predominant cause of project delays and higher costs have been people, material, and equipment movement restrictions, supply chain disruptions, and social distancing polic...
By Ilija Stojanović, Marko Selaković, Marija Gačić, Milica Kaplarević, Nenad Filipović
LOAD-CARRYING CAPACITY OF PIVOTED CURVED SLIDER BEARINGS SUBJECT TO SURFACE ROUGHNESS PATTERN AND NON-NEWTONIAN FLUID FLOW BEHAVIOR
The present paper analyzes the Rabinowitsch fluid (RF) behavior on a pivoted curved slider with surface roughness (SR) with the aid of the perturbation technique. In order to account for the random roughness of the bearing surfaces, a stochastic random variable with a nonzero mean, variance, and skewness was taken into consideration. The averaged R...
By Amit Kumar Rahul, Manoj Kumar Singh, Om Namah Sivaya, Saurabh Chandra Maury, Ravi Tiwari, Rohahn Biswas
A NEW DESIGN OF EFFICIENT PLANE SOLAR COLLECTORS FOR AIR AND WATER HEATING
In this paper, a new design of solar air-water heater for the purpose of performance improvement is introduced for the first time. This thermal system will be a good alternative for both space heating and providing domestic hot water for use in buildings. In the proposed solar collector, the absorbed incoming solar irradiation is transferred into b...
By Seyyed Abdolreza Gandjalikhan Nassab