FG Strukturmechanik und Strukturberechnung

29 Items

Recent Submissions
Evaluation of rapeseed varieties using novel integrated fuzzy PIPRECIA – Fuzzy MABAC model

Nedeljković, Miroslav ; Puška, Adis ; Doljanica, Suzana ; Jovanović, Saša Virijević ; Brzaković, Pavle ; Stević, Željko ; Marinkovic, Dragan (2021-02-25)

Decision making is constantly present in agriculture. Choosing the wrong variety carries the risk that the investment in terms of sowing does not pay off at all. Therefore, it is necessary to choose the variety that gives the best results. In order to achieve this, it is necessary to apply multi-criteria decision-making of available varieties, which is, in this paper, done on the example of hyb...

Experimentally examining the mechanical behaviour of nap-core sandwich material – A novel type of structural composite

Ha, Giap X. ; Bernaschek, Andreas ; Zehn, Manfred W. (2019-04-01)

Experimental investigation of the nap-core sandwich is presented in detail, in which the nap-core is based on knitted fabric, being impregnated with a thermoset resin, formed to create cup-shaped naps, and stabilized to assume a permanent 3D contour. The material is a novel type of lightweight sandwich-structured composite which has good specific strengths and possesses various properties cruci...

Evaluation of Process Orientation Dimensions in the Apparel Industry

Dobrosavljević, Andrea ; Urošević, Snežana ; Vuković, Milovan ; Talijan, Miroslav ; Marinković, Dragan (2020-05-19)

The dimensions that influence the establishment of business process management (BPM) practices and the progression to higher levels of process maturity derive from exploring the dimensions of process orientation of organizations. Small and medium-sized clothing enterprises (SME’s) are characterized by various specifics that can affect the degree of process orientation adoption and the pace of t...

Determining the Competitiveness of Spa-Centers in Order to Achieve Sustainability Using a Fuzzy Multi-Criteria Decision-Making Model

Mijajlović, Miroslav ; Puška, Adis ; Stević, Željko ; Marinković, Dragan ; Doljanica, Dragan ; Jovanović, Saša Virijević ; Stojanović, Ilija ; Beširović, Jasminka (2020-10-16)

Bosnia and Herzegovina (B&H) possess many natural resources that can be exploited for the development of medical tourism. The offer of medical tourism in B&H is focused on spa tourism. B&H has 16 registered spa-centers offering different types of services. This study provides a complete overview of the assessment of the current state of spa-centres using expert decision-making and methods of mu...

A Novel Entropy-Fuzzy PIPRECIA-DEA Model for Safety Evaluation of Railway Traffic

Blagojević, Aleksandar ; Stević, Željko ; Marinković, Dragan ; Kasalica, Sandra ; Rajilić, Snježana (2020-09-09)

The conditions of globalization often dictate the functioning of transport markets, so it is necessary to conduct frequent research in order to achieve sustainable business. This is achieved through adequate risk and safety management at all levels. The research carried out in this paper includes determining the state of railway traffic safety in a total of nine railway sections in Bosnia and H...

Development of a Multi-Criteria Model for Sustainable Reorganization of a Healthcare System in an Emergency Situation Caused by the COVID-19 Pandemic

Pamučar, Dragan ; Žižović, Mališa ; Marinković, Dragan ; Doljanica, Dragan ; Jovanović, Saša Virijević ; Brzaković, Pavle (2020-09-11)

Healthcare systems worldwide are facing problems in providing health care to patients in a pandemic caused by the SARS-CoV-2 virus (COVID-19). The pandemic causes an extreme disease to spread with fluctuating needs among patients, which significantly affect the capacity and overall performance of healthcare systems. In addition, its impact on the sustainability of the entire economic and social...

Parametric investigations of mechanical properties of nap-core sandwich composites

Ha, Giap X. ; Marinković, Dragan ; Zehn, Manfred (2018-12-30)

The focus of this paper lies on the sensitivity of the nap-core sandwich – a novel kind of structural composite – to changes of its parameters. First, the fabrication, properties, and applications of the nap-core sandwich are briefly presented. This is followed by consideration of the sandwich composite's mechanical behavior. Finite element based simulation is applied to perform the parametric ...

A review on computer modeling of bone piezoelectricity and its application to bone adaptation and regeneration

Mohammadkhah, Melika ; Marinković, Dragan ; Zehn, Manfred ; Checa, Sara (2019-07-26)

Bone is a hierarchical, multiphasic and anisotropic structure which in addition possess piezoelectric properties. The generation of piezoelectricity in bone is a complex process which has been shown to play a key role both in bone adaptation and regeneration. In order to understand the complex biological, mechanical and electrical interactions that take place during these processes, several com...

Performance evaluation of cord material models applied to structural analysis of tires

Korunović, Nikola ; Fragassa, Cristiano ; Marinković, Dragan ; Vitković, Nikola ; Trajanović, Miroslav (2019-05-21)

Tires are, in essence, a composite structure made of reinforced elastomers. As in other composite structures, the accuracy of finite elements (FEs) in predicting the performance of a tire is highly dependent on the validity of the material models chosen to describe the mechanical behavior of its constituents. This paper concentrates on the material modeling of tire reinforcements, and analyzes ...

Co-rotational shell element for numerical analysis of laminated piezoelectric composite structures

Marinković, Dragan ; Rama, Gil (2017-05-27)

Laminated composite structures consisting of load-carrying and multifunctional materials represent a rather powerful material system. The passive, load-carrying layers can be made of isotropic material or fiber-reinforced composites, while piezoelectric materials represent the most common choice of multifunctional materials for active layers. The multifunctionality of piezoelectric layers is pr...

Efficient three-node finite shell element for linear and geometrically nonlinear analyses of piezoelectric laminated structures

Rama, Gil ; Marinković, Dragan ; Zehn, Manfred (2017-04-30)

Fiber-reinforced composite laminates involving piezoelectric layers represent a very attractive material system. It combines the advantages of using rather lightweight and stiff material with the possibility of sensing structural changes and actively influencing its state by means of sensors and actuators. A three-node shell element is proposed as an efficient tool for modeling structures made ...

High performance 3-node shell element for linear and geometrically nonlinear analysis of composite laminates

Rama, Gil ; Marinković, Dragan ; Zehn, Manfred (2018-06-13)

Thin-walled structures hold primacy among modern engineering structures. All the advantages offered by the curved geometry and thinness of the walls come even more to the fore when combined with exquisite properties of fiber-reinforced composite laminates. Directionally dependant material properties open vast possibilities for tailoring global structural properties and, therewith, optimization....

Towards real-time simulation of deformable structures by means of co-rotational finite element formulation

Marinković, Dragan ; Zehn, Manfred ; Rama, Gil (2018-06-23)

Whereas typical Finite Element (FE) computations are performed off-line, many virtual-reality (VR) applications put a demand for interactive simulations involving deformable objects. Interactive simulation implies real-time or nearly real-time computation and graphical representation of modeled deformable objects. The growing computational power of modern conventional hardware calls for FEM dev...

Parametric Investigation of a Rail Damper Design Based on a Lab-Scaled Model

Kuchak, Alireza Jahan Tigh ; Marinković, Dragan ; Zehn, Manfred (2020-04-27)

Background: Track noise is one of the main issues in the development of railway networks. It is well-known that rail dampers, as a cost-effective, passive means of vibration reduction, do reduce the noise, still neither the mechanism behind their action, nor the influential parameters are well understood. Purpose: The main purpose of this work is to investigate the efficiency and influential ...

Multiscale in silico model to investigate compromised bone healing conditions

Borgiani, Edoardo (2020)

Mechanics plays a key role in bone regeneration as it modulates the biological events taking place during the process. Extensive research has been done on elucidating the mechanical “rules” driving bone regeneration in uneventful healing conditions. However, under compromised healing conditions (e.g. aging, large bone defects) the mechanical regulation of healing might be altered and result in ...

Numerical and experimental investigation of the assessment of rail damper parameters with a new lab-scaled model

Jahan Tigh Kuchak, Alireza (2020)

One of the major problem in the development of railway network is track noise. Control of the noise pollution is an important environmental concern in urban areas. Rolling noise is one of the major sources of noise, and rail dampers as an extra installed-mass on the rail are a common method to reduce the rail vibration and consequently rail noise. In most cases, the experimental results from fi...

Ein hocheffizientes finites Dreieckselement zur Berechnung dünnwandiger piezoelektrischer Strukturen

Rama, Gil (2019)

Verbundlaminate aus lasttragenden und multifunktionalen Schichten stellen leistungsfähige moderne Materialsysteme dar. Die dabei verwendeten passiven lasttragenden Schichten bestehen in der Regel aus Faserverbundwerkstoffen oder aus isotropen Materialien. Piezoelektrische Materialien eignen sich aufgrund ihrer sehr gut nutzbaren elektromechanischen Kopplungseigenschaften zur Ausführung multifun...

In Silico Optimization of Femoral Fixator Position and Configuration by Parametric CAD Model

Korunovic, Nikola ; Marinković, Dragan ; Trajanovic, Miroslav ; Zehn, Manfred ; Mitkovic, Milorad ; Affatato, Saverio (2019-07-22)

Structural analysis, based on the finite element method, and structural optimization, can help surgery planning or decrease the probability of fixator failure during bone healing. Structural optimization implies the creation of many finite element model instances, usually built using a computer-aided design (CAD) model of the bone-fixator assembly. The three most important features of such CAD ...

Dealing with Nap-Core Sandwich Composites: How to Predict the Effect of Symmetry

Ha, Giap ; Zehn, Manfred ; Marinković, Dragan ; Fragassa, Cristiano (2019-03-15)

The behavior of nap-core sandwiches was investigated with a special focus on the effect of symmetry in nap cores. A nap-core is, in general terms, a 3D-formed hollow structure made of knitted textile impregnated by a thermosetting resin. The molding process determines if the nap-core is double-sided (symmetric) or single-sided. The sandwich with nap-core owns various remarkable properties of a ...

Survey of Finite Element Method-Based Real-Time Simulations

Marinković, Dragan ; Zehn, Manfred (2019-07-10)

The finite element method (FEM) has deservedly gained the reputation of the most powerful, highly efficient, and versatile numerical method in the field of structural analysis. Though typical application of FE programs implies the so-called “off-line” computations, the rapid pace of hardware development over the past couple of decades was the major impetus for numerous researchers to consider t...