Numerous phenomena that occur during the process of machine parts’ regeneration have a significant impact on loss their working ability. Therefore, properties surfaces teeth flanks repaired gears were analyzed in this research. The hereditary gear are expressed by interdependence geometric and physical-mechanical-metallurgical parameters created technological operations worn welding/hard-facing. hard-facing was executed with three filler metal types, namely: combination Inox 18/8/6 + EDur...

Hydroxyapatite (HAP) inserts minimize restoration contraction by constituting a major part of the restoration; however, their effect on relaxation tooth tissues has not been previously tested. Finite element analysis was employed to estimate stress and displacement when HAP with thickness 1.7 mm or 4.7 diameter were used substitute for dentin. The volumetric composite during polymerization, simulated through steady-state heat transfer analysis, yielded rate 3.7%. Descriptive statistics...

Steel of the mild-strength S355J2+N steel grade is most often used for manufacturing carrying sections constructions exposed to fatigue loads. The use high-strength steels, such as S690QL, allows creation structures that are light and simple construct. However, increasing yield strength steels does not result in a corresponding increase resistance. As result, using subjected loading can be major design concern, raising question whether should at all. Most experimental investigations...

The problem of internal forces that occur on the cycloid disc during speed reducer operation so far has not been considered in a way reflects its actual workloads and stresses itself. This paper presents dynamic analysis stress-strain state by using experimental numerical methods. following cases meshing are presented paper: single-tooth, double-tooth, triple-tooth ring gear. was chosen for this study because it is one main elements most critical element reducer. An physical model made based...

Steel structures are designed to operate in an elastic domain, but sometimes plastic strains induce damage and fracture. Besides experimental investigation, a phase-field model (PFDM) emerged as cutting-edge simulation technique for predicting evolution. In this paper, von Mises metal plasticity is modified coupling with PFDM improved simulate ductile behavior of metallic materials or without constant stress plateau after yielding occurs. The proposed improvements are: (1) new variable...

Aluminum alloys are widely used in military and aviation industry due to their properties such as low density high strength. During the aircraft operation there mechanical failures of various structural components caused by numerous mechanisms corrosion, material defects, cycle fatigue like. One frequent on air-cooled piston engines is cylinder head cracking. This paper continuation a comprehensive research Lycoming IO-360-B1F failure. The failure this type has already occurred during flight...

Analysis of a p-n junction with arbitrary value the grading coefficient is conduced. Presented solution linking widely used diode's depletion layer capacitance equation analytically defined impurity doping profile. Derivations are verified against numerical simulations based on finite element method which experimentally prove correctness. Also, analytical expressions for other physical quantities diode, like electric field, charge, potential, space charge region width, follow straightforwardly.

Introduction/purpose: In recent times, with the tendency to develop new types of armor-piercing ammunition, constant investments in development armored obstacles is necessary. Obstacles made high-alloy steel plates are still best form protection against larger caliber ammunition. There a number factors consider when selecting an alloy, including weight, dimensions, intended use, desired ballistic performance, and costs. According that, numerical analysis penetration 30mm fin-stabilized...

(1) Modeling and characterization of ductile fracture in metals is still a challenging task the field computational mechanics. Experimental testing offers specific responses form crack-mouth (CMOD) crack-tip (CTOD) opening displacement related to applied force or crack growth. The main aim this paper develop phase-field-based Finite Element Method (FEM) implementation for modeling stainless steel. (2) A Phase-Field Damage Model (PFDM) was coupled with von Mises plasticity...

This paper deals with the problem of optimal vessel end closures subjected to internal pressure. research aims analyse shapes middle surfaces in case one-arc and two-arc domes. The solutions seek minimize design complexity while satisfying geometric strength requirements. For closures, meridional profiles are defined by a generalized ellipse as well Bezier polynomial 5th degree, they represented polynomials 3rd degree. static analysis was conducted using finite elements method implemented...

In the system of power transmission from driving to operating machine, cardan couplings are components vital importance. Due ability transmit over long distances, as well insensitivity coaxiality connecting shafts, they have found wide application in all branches mechanical engineering. plant for production profiled semi-finished steel products, a volumetric failure sleeve on universal cross joint (UCJ) coupling occured. This type occurs very rarely with couplings. order understand real...

This paper explores the effects of tempering temperatures on mechanical properties G42CrMo4 cast steel, a versatile alloy commonly used in automotive and construction industries. Tempering, critical step heat treatment process, aims to reduce residual stresses enhance material reliability. The study investigates influence (450°C 600°C) steel's strength, ductility, hardness through series experimental investigations, including treatment, machining, tensile testing. Results indicate that while...

The paper presents analytical and numerical analysis of axial stresses in a novel designed high explosive rocket assisted projectile body during its launch. Classical theoretical approach finite element method (FEM) were used for this purpose. design is based on the M107 M549 projectiles, enhancing range withstanding barrel pressure from propellant charges used. goal research to present that obtained results, characteristic cross-sections, founded by classical methods, give good agreement....

The aim of this paper is to present the results mechanical testing carbon structural steel S235JR and its butt-welded joints, which were performed using a robot (MAG process). One pair plates with dimensions 200x500 mm thickness 12 was prepared for welding. preparation involved laser cutting groove A V-groove machined on CNC milling machine, in accordance base material. Additionally, special copper backing strip welding improve quality root weld, without supplementary activities or...

This paper presents comparative experimental and numerical strength analysis of wagon for transporting bulk material according to the TSI standard norm EN 12663:2000. The aim this is show that results stresses obtained by measuring with strain gauges FEM calculation gives good agreement. Based on their match, it can be concluded reliably used structural analysis. According fact, reduce number testing new products. leads great savings in design prototypes, order immediately start process mass...

The paper presents the results of theoretical, numerical, and experimental research related to analysis possibility using natrium silicate in design fixtures.Two possible aggregate states (liquid solid state) with its strong adhesion metal materials as well a number other properties were used, it was proven that can find significant applications fixture workpieces, especially when machining workpieces thin walls complex contours, pockets large pocket depth wall thickness ratio.The performed...

Introduction/purpose: Thin plates made of high-strength steel are frequently used both in civil and military ballistic protection systems. In order to choose an appropriate type alloy, it is necessary fulfil a number criteria, such as the condition use, desired performance, weight, dimensions, price. This paper presents numerical analysis penetration 30mm armor-piercing projectile with velocity 750m/s into alloy Weldox 460 different thicknesses at distance 1000m . Methods: The has been...