Microscopic Investigation on Material Stucture of Broken Additively Manufactured Parts

2015 ◽  
Vol 808 ◽  
pp. 175-180
Author(s):  
Gergely Dezső ◽  
Ferenc Szigeti
Keyword(s):  
Electron Microscope ◽  
Material Properties ◽  
Manufacturing System ◽  
Impact Test ◽  
Charpy Impact ◽  
Charpy Impact Test ◽  
Microscopic Investigation ◽  
Material Structure ◽  
Test Machine ◽  
Structure And Properties

In spite of its complexitiy and difficulties in measuring it, fracture can reveal a high amount of information on material structure and properties. Microstructure of additive manufactured parts is studied in this work. Standard impact test parts were manufactured on OBJET EDEN 350V machine in three different orientation, and they were broken by a Charpy impact test machine. Different surfaces of broken parts were studied with an electron microscope. High variety of structures were observed, and explained by technological aspects of manufacturing system, and material properties. It is shown, that material is surprisingly brittle. Microscopic study pointed out that microstructure is definitely anisotropic.

Modelling of Charpy Test Using the FEM Method in LS-DYNA Software

2014 ◽  
Vol 224 ◽  
pp. 244-248
Author(s):  
Michał Stopel ◽  
Michał Burak ◽  
Dariusz Skibicki
Keyword(s):  
Impact Test ◽  
Charpy Impact ◽  
Charpy Impact Test ◽  
Test Machine ◽  
Charpy Test ◽  
Fem Method

The hereby paper presents comparison of numerically modelled Charpy test in LS-Dyna environment with an experiment on accredited Charpy impact test machine. The comparison was applied to dimensions of a strained sample at selected points and energy consumed for the sample fracture and strains during the test.

Analysis of Vibrational Energy on the Pendulum Based on Finite Element

2016 ◽  
Vol 693 ◽  
pp. 453-457
Author(s):  
Xin Luo
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Manufacturing Industry ◽  
Impact Test ◽  
Charpy Impact ◽  
Charpy Impact Test ◽  
Test Machine ◽  
Element Analysis ◽  
Processing Technologies ◽  
The Finite Element Analysis

Charpy impact test is very sensitive to mechanical processing technologies and product defects. Charpy impact test can give quantitative test data and improve the product quality of advanced manufacturing industry and the safety of the application of new materials. The Charpy impact test machine has elastic deformation. The center of percussion is different from the designed center of strike and this difference can affect the vibration energy on the pendulum. In this article, by using the finite element analysis method, we simulate experimental processes having different distance to the center of percussion and obtain the numerical quantity related effects. In the end, we verify the accuracy of the finite element analysis by using different energy level impact test.

scholarly journals Flexural behaviour of ABS 3D printed parts on professional printer Stratasys Fortus 900mc

2018 ◽  
Vol 210 ◽  
pp. 04048 ◽  
Author(s):  
Pavel Stoklasek ◽  
Milan Navratil ◽  
Martin Bednarik ◽  
Ivan Hudec ◽  
Dalibor Petrzelka
Keyword(s):  
Layer Thickness ◽  
Material Properties ◽  
Impact Test ◽  
Low Cost ◽  
Charpy Impact ◽  
Polymeric Materials ◽  
Basic Material ◽  
Test Machine ◽  
Building Orientation ◽  
3D Printed

Nowadays, it is very desirable to obtain the low cost polymeric material with the best material properties. For the best modification of the commodity and construction polymeric materials it is firstly necessary to know the basic material properties. In this study the bending and Charpy impact test specimens were fabricated via a professional FDM 3D printer Fortus 900mc, from company Stratasys, processing ABS-M30 in three build orientation XY, XZ-H and XZ-V. The 3D printed test specimens were examined to compare the effect of layer thickness and building orientation. Tensile test machine Zwick 1456 and impact pendulum Zwick HIT50P were used for bending and Charpy impact tests. Optical microscopy was utilized to perform fractography on impact test specimens to explore the effect of the layer thickness and building orientation on the fracture surface morphology of the failed specimens. This study demonstrates the need for material testing for specific processing as additive manufacturing technologies.

scholarly journals Mathematical function for the transition curves description 

2012 ◽  
Vol 51 (No. 3) ◽  
pp. 85-90
Author(s):  
R. Chotěborský ◽  
D. Herák ◽  
V. Bezouška ◽  
P. Hrabě ◽  
M. Müller
Keyword(s):  
Impact Energy ◽  
Material Properties ◽  
Impact Test ◽  
Charpy Impact ◽  
Data File ◽  
Charpy Impact Test ◽  
Measured Data ◽  
Mathematical Function ◽  
The Impact ◽  
Transition Curves

Toughness is one of important material properties. At present steel is still the most used material. Owing to the temperature this material can fail both brittly and ductily. Therefore we look for the temperature above which the material will failur ductily. The Charpy impact test is one of methods how to determine the ductility by the temperature – transition access in the determined temperature range. The measured data file is large and it requires the interlay by a curve which presents the relation between the impact energy and the temperature.

Influence of Honeycomb Core Compression on the Mechanical Properties of the Sandwich Structure

2013 ◽  
Vol 486 ◽  
pp. 283-288
Author(s):  
Ladislav Fojtl ◽  
Soňa Rusnáková ◽  
Milan Žaludek
Keyword(s):  
Mechanical Properties ◽  
Impact Test ◽  
Charpy Impact ◽  
Charpy Impact Test ◽  
Low Velocity Impact ◽  
Bending Test ◽  
Honeycomb Core ◽  
Low Velocity ◽  
Three Point Bending ◽  
Core Technology

This research paper deals with an investigation of the influence of honeycomb core compression on the mechanical properties of sandwich structures. These structures consist of prepreg facing layers and two different material types of honeycomb and are produced by modified compression molding called Crush-Core technology. Produced structures are mechanically tested in three-point bending test and subjected to low-velocity impact and Charpy impact test.

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