A numerical approach for evaluation of crack initiation in thermally cut structural elements made of martensitic steel is presented. A numerical simulation of micro-crack initiation is based on the Tanaka-Mura model, where individual grains of synthetic microstructure are simulated using the Voronoi tessellation. Three improvements are added to this model (multiple slip bands, micro-crack coalescence and segmented micro-crack generation). The results of the proposed computational model show a reasonable correlation with the experimental results.
COBISS.SI-ID: 13864982
The chapter in scientific monograph presents the theory of flat fabric porosity. In the first part, the ideal geometric model of fabric porous structure on which some porous parameters of woven fabrics can be defined, is presented. The second part deals with the ideal model of porous structure of non-woven fabrics with theoretically defined porous parameters. Further sub-chapters are focused on the possibility of porous structure modelling by non-deterministic modelling tools (genetic programming, genetic algorithms) as “tools” for fabric engineers in a process of a new product development for specific applications. Such tools namely allow the reduction of research costs as well as sample production costs in the phase of a new fabric development.
COBISS.SI-ID: 16367894
This paper discusses a framework for intelligent decision support for structural design analysis using a finite element method. The intelligent environment presented is composed of several knowledge-based modules in order to address some major bottlenecks within the analysis-based design improvement process. The prototypes of four intelligent modules are presented within this context. These are: an intelligent module for supporting some initial decisions within the design analysis process, an intelligent module for finite elements' selection, an intelligent module for finite element mesh design, and an intelligent module for supporting the results' interpretation process. According to the feedbacks of those experts who participated in the evaluation process, these prototypes could be applied as useful supporting tools for inexperienced designers in design practice, as shown in certain examples presented in this paper.
COBISS.SI-ID: 14672406
The paper addresses the structural characterisation of advanced pore morphology (APM) foam elements. APM foam elements have a sphere-like shape with solid skin and a complex internal porous structure. The understanding of structure-property relations depends on accurate characterisation of this complex porous geometry. To this end, micro-computed tomography scanning of APM foam elements is conducted and obtained images are analysed using a novel methodology for determination of spatial and size distribution of pores.
COBISS.SI-ID: 17097494
The paper presents the results of studying the influence of silicone polymer pore filler on the mechanical energy absorption capacity of aluminium foam. Based on quasi-static and dynamic compression tests supported by thermography the influence of pore size, strain rate and the influence of the silicone pore filler on the mechanical properties of metal foams has been analysed.
COBISS.SI-ID: 17274902