The polyamide (PA)-12 material used for additive manufacturing was studied in aspects of morphology and their structural properties basic stages received during 3D laser printing. Samples were real, big-scale production powders. structure polymer evaluated from the crystallinity point view using XRD, FTIR, DSC methods surface specific evaluation porosity. Scanning electron microscopy to observe evaluate particle size shape via image analysis. Results confronted with diffraction particles...

This research article outlines our aim to perform topology optimization (TO) by reducing the mass of connecting rod an internal combustion engine based on static structural and dynamic analyses. The basic components like rods, pistons, crankshaft, cylinder liners were designed using Autodesk Inventor Professional 2025. Using optimization, we aimed achieve lesser maximum von Mises stress during analysis maintain a factor safety (FOS) above 2.5 rigid body dynamics. A force 64,500 N was applied...

Printed circuit boards (PCBs) can be an important source of non-ferrous metals (Al, Sn, Zn, and Ni) precious (Au, Ag, Cu, Pd). With the continuous increase in demand for due to depletion ores, recycling this waste is becoming attractive alternative. The printed circuits also contain hazardous metals, such as Pb, Hg, As, Cd. Due huge amount e-waste, processing metal recovery proper handling substances has a positive effect on environment. Pyrometallurgical hydrometallurgical methods are used...

Abstract This article deals with the adjustment of a 3D printer for laser engraving and material cutting. The print head can be fitted solid diode module, which achieves compact size while retaining its useful power. Two paths lead to use such concept. It is possible equip existing also brings number disadvantages as, example, reduction printing space or need suitable mounting design. A more elegant solution consider this in design system exchange heads engraving. Such allows full...

In order for bioceramics to be further used in composites and their applications, it is important change the surface so that inert material ready interact with another material. Medical grade alumina zirconia ceramic powders have been chemically etched three selected acidic mixtures. Powder samples were taken characterization, which was key evaluating a successful change. Changes morphology, together chemical composition, studied using scanning electron microscopy, phase composition X-ray...

This paper presents an analysis of the torsional stiffness frame Formula TU Ostrava team vehicle Vector 04. The first part introduces SAE project and importance in structures. continues with a description testing method used to determine explanation experimental procedure. consists attaching suspension two beams. A force is applied one beams, causing load on frame. From displacements certain nodes frame, overall sectional torsion then determined. Based experiment, FEM simulation model was...

This article aims to review a redesign approach of student racing car's clutch lever component, which was topologically optimized and manufactured by Additive Manufacturing (AM). Finite Element Method (FEM) analysis conducted before after Topology Optimization (TO) process in order achieve equivalent stiffness the desired safety factor for part. The redesigned using AM-Selective Laser Melting (SLM) printed from powdered aluminum alloy AlSi10Mg. final evaluation study deals with experimental...

The use of impact attenuators (IA) is important for vehicles as they absorb the kinetic energy exerted from car crashes to protect drivers any possible injuries. Under framework Formula Student (FS) competition, we investigate various designs IA made aluminum honeycomb material. Specifically, crushing behavior structure investigated theoretical point view and later verified with numerical simulations. To achieve desired structure, apart so-called pre-crushing method, another way pre-process...

Today, Ni-Cr steel is used for advanced applications in the high-temperature and electrical industries, medical equipment, food industry, agriculture applied beverage packaging kitchenware, automotive or mesh. A study of input powder from various stages recycling process intended 3D printing was conducted. In addition to precise evaluation morphology, particle size composition powders laser printing, special testing heat-treated were carried out. Heat treatment up 950 °C an air atmosphere...

Fluidized bed porosity ɛ is a primary property of fluidized systems when determining the minimum floating velocity. The air flow rate in (or fluid layer material) increases with diminishing porosity. This paper devoted to calculations for consisting spherical particles having different diameters (2, 4, 6, 8, 10 mm) and differently shaped polygonal cells possessing characteristic particle velocities. For testing purposes, was experimentally measured subsequently modelled by simulation using...

This paper concerns the modelling of simulation structure for torsional stiffness evaluation a Formula SAE vehicle frame and presents some insights into problem using beam-like model together with geometrical simplifications. The consist presenting utilized simplifications assessing their influence on stiffness. model, consisting frame, suspension testing fixture complex shapes, requires certain to achieve sustainable computational time while getting reasonable results. such as linear...

Current trends in the transportation industry prioritize competitive rivalry, compelling manufacturers to concepts such as quality and reliability. These are closely associated with public expectations of safety, vehicle lifespan, trouble-free operation. However, must recognize that a weighing several hundred kilograms, moving at non-zero speed, only contacts road surface through few points (depending on number wheels), each no larger than human palm. Therefore, it is imperative operate...

The present article deals with investigation of geometric properties surface modified titanium white the help silica oxide by various methods shape and size identification clusters made processing fluidisation. For purpose artificially (titanium white) was processed fluidisation a defined percentage additive. selected additive represented hydrophilic pyrogenic (micronised oxide), known under commercial name Aerosil 200, R972 metal Aeroxide P25. began image acquisition individual additives...

Technology of a composite material silicon nano-particles (99.999 w% for semiconductors) arranged densely in metal tin matrix (99.7 w%) is presented the present paper. The main motivation technology development an endeavor to prepare nano-composite which semiconductor particles are crowded by applying high pressure matrix. In above arrangement, coexistence very narrow mesh nanostructure with dispersed nanoparicles involved. With level volume density nanoparticles, surface interface between...

This paper deals with adjustment of certain optical parameters nano and micro-structured particles silica by which Mastersizer 2000 as a device for size distribution particle measurement has been used. The method process may be used looking unique refractive absorption index investigated particles. Optical properties, i.e. the have found related to inter-particle bindings in form Hamaker constants. For properties calculations using Mie Scattering solutions representing electric magnetic...

The paper deals with an experience innovation process of a technical solution grinding device for homogenization mechanical metallurgy process.Milling equipment-ball mills and planetary ball are used conventional material milling.Their principle is based on very fine milling the material.As other equipment, there effect by combining three factors: pressure, impact, smearing.A major disadvantage previously equipment fact that during process, due to pressure impact bodies, agglomerates...