The contribution presents the verification of methodology accelerated creep tests from point view obtaining more information about stress–strain behaviour investigated materials using Digital Image Correlation method. Creep are performed on SAC305 and SACX0807 lead-free solders supplemented by numerical modelling finite element method, considering viscoplastic model based theory Perzyna, Chaboche, Norton. both appears to be very similar at applied strain rates 0.0002–0.0026%/s stresses 15–28...

Abstract This paper shows some differences in stress-strain behavior of conventional and 3D print SS316L. First, the influence strain rate on monotonic curve has been investigated. Specimens produced by Selective Laser Melting technology were not so sensitive to rate. Viscoplasticity be taken into account for cyclic loading modelling case conventionally SS316L but printed material. A set low-cycle fatigue tests was performed specimens from both used production technologies. Uniaxial...

The contribution deals with the problematics of topology optimization arm a mobile robot manipulator for international competition European Rover Challenge (ERC).The was designed at Department Robotics VSB -TU Ostrava and is described in detail below.The aim to test entire design process: determination loading forces, material model parameters identification, maximal allowed stress structure, manufacturing process by FDM additive technology.The has been tested his future automation.The also...

Abstract The aim of this work is to find out the components stress tensor in plane specimens. For purpose photoelasticity methodology used. In order make technique more comfortable for use, there was developed an algorithm MATLAB program. results are compared with numerical solution. main advantages speed and capabilities extend analyze plastic deformation strain conditions material during forming processes.

Currently, there is an increasing use of machine parts manufactured using 3D printing technology. For the numerical prediction behavior such printed parts, it necessary to choose a suitable material model and corresponding parameters. This paper focuses on determination parameters Anand for acrylonitrile butadiene styrene (ABS-M30) material. Material were determined genetic algorithm (GA) method finite element (FEM) calculations. The FEM simulations subsequently adjusted experimental tests...

This contribution presents a new methodology of fatigue tests evaluation based on digital image correlation application. The full-field strain analysis brings the possibility 3D measurement curved part specimen standardly used under axial-torsional loading. Resulting response curves can subsequently serve for cyclic plasticity model predictions. crucial idea is way FE creation to evaluate simulation in same points structure as DIC measurement. saves amount material and leads shorter...

The article describes a new accelerated technique for estimation of cyclic stress-strain curves cyclically stable materials based on full-field measurement strain during low-cycle testing large amplitude loading. Any optical method suitable capturing the contours curved part specimen loading is applicable in approach developed. In this study, digital image correlation used to measure deformation specimen. presented chosen results fatigue tests performed AlSi10Mg printed with selective laser...

Photoelasticity is a whole field experimental technique for the measurement and visualizing of stress strains in loaded members. This work intended to create unique procedure that allows use computer aided evaluation results. The specimens thin annular disk, disk shaped beam were tested. PATRAN program used finite element solution analysis investigated specimens. excellent agreement established between results based on created numerical computations.

The design of a manipulator arm, which is built from construction kit, presented in this article. procedure based on the results discrete optimization truss structure and its application to simple component system (assuming predefined shape material components). A genetic algorithm used optimize structure, solution are verified task literature (the code was written Python language). kit inspired by Merkur®, article proposes several components with different shapes materials. were arm....

This paper examines the effect of experiments used to identify material parameters a more complex model (12 parameters). The set includes tensile tests and indentation with different loading conditions at 4 temperatures (a total 14 experiments) for ABS-M30 material. behaviour was simulated using Anand's model, Finite Element Model Updating approach parameters. are solved 3 variants: identification from tests, all experiments. For first two variants, remaining verify. Finally, results compared.

This paper deals with experimental investigations and numerical simulations of HELICOIL® inserts in ABS-M30 plastic. The aim is to explore the possibilities modelling using Finite Element Method (FEM) thus predict load-bearing capacity these inserts. motivation was based on a previously published article that dealt topological design robot manipulator arm shape. During mechanical tests, structure did not collapse, but were torn out. To determine inserts, necessary tests designed carried FEM...

The article deals with the design of technology production polyurethane foam (PU) specimens and their mechanical testing. A simple procedure is proposed to produce complex shapes. tested on two different mounting foams. These were subjected several experiments. presents experimental results for only one foam. tests performed a Testometric M500-50CT testing machine. Specifically, these are tensile/compression test, 3-point bending shear modified indentation test. For each specimen,...

This paper details the possibility of simulating HELICOIL® inserts using Finite Element Analysis and contact technology. The main procedure is based on use elements in Glue–Cohesive setting, which usually considered for simulation composites. represents behaviour an interface, including insert, sample threads, screw threads. cohesive determined by a multi-linear curve, described several parameters. Our goal to determine number parameters their values provide defined accuracy. made ABS-M30...