SCIDAR - A Digital Archive of the University of Kragujevac

This article is dedicated to transportation efficiency and the related problems. Its main goal is to analyse the effects that optimization can have on transportation efficiency and its ecological performances. This problem essentially refers to determining the most lucrative maximum quantity of commodity that can be loaded in a transportation vehicle. We used evolutionary algorithm in Excel solver to observe three different case studies. In all case studies a loading capacity of a transportat...

This paper will be given the dimensioning and check calculation of set screw connections with the design automation process. The introductory part of the paper shows the papers which deal with set screw connection problems. A critical overview of this field is given, along with the possibilities of design automation. A practice example of design was chosen for this investigation. Before the design model is made, the design is translated to mathematics parameters for dimensions and check ...

This research examines the use of PSO sizing optimization for the planar truss mass minimization problem. In order to achieve practically applicable results, the examples used in the paper are also subjected to Euler buckling constraints. All examples use discrete sizing variables to generate models which can be constructed from bar element sizes available in the given material. The complexity added by implementing a dynamic constraint for buckling significantly influences the search space an...

Truss optimization has the goal of achieving savings in costs and material while maintaining structural characteristics. In this research a 10 bar truss was structurally optimized in Rhino 6 using genetic algorithm optimization method. Results from previous research where sizing optimization was limited to using only three different cross-sections were compared to a sizing and shape optimization model which uses only those three cross-sections. Significant savings in mass have been found when...

This research focuses on determining the effects of structural optimization on 10 bar trusses. Structural optimization is one in Rhino 6, using GA optimization. Shape optimization was done to find savings in used material in relation to total element lengths. The new optimized structure which meets all constraint criteria has different element lengths to the initial design. Optimal values are compared to initial values showing that the total length of elements can be decreased by roughly 28%....

In order to achieve the most practically applicable results the optimization model must have the most realistic variables, loading and constraints. One of the main constraints which is frequently overlooked in previously published research is bucking. Since this constraint is changing in each iteration of the optimization process it is very complex and is considered a dynamic constraint. This paper shows the implementation of such a constraint into the structural optimization process. A typic...

This study thoroughly examined the impact of abrasive action on the surface roughness and mass loss of laminated composites produced using the wet lay-up method. Surface roughness measurements conducted in both the transverse and longitudinal directions before and after treatment with P3000 grit sandpaper revealed a significant increase in roughness, along with minimal mass loss. Considering the characteristics of the epoxy resin used, the results indicate a high wear resistance of the lamin...

Most research to date which covers the topic of truss structural optimization either doesn’t consider, or uses fixed constraints for buckling. This paper presents a comparison of truss structural optimization types with and without the use of Euler buckling dynamic constraints. The difference is presented on a standard test model with 17 bars using continuous variables for cross section and node positions. The optimization method used is genetic algorithm for optimizing sizing, shape, topolog...

This paper is oriented on maximizing the beneficial, and minimizing the negative effects in creating energy efficient buildings. Optimization is performed in Design Builder software based on various criteria. A building was modeled for the needs of this research using standard materials and systems built into the software. For the created object which hill be the subject of the experiment a minimization of CO2emissions, minimization of building and installation costs, while energy efficiency ...