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.

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.

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 Evaluation of mechanical properties of gas pipeline DN 500 after more than 40 years of its operation

2018 ◽  
Vol 62 (4) ◽  
pp. 115-120
Author(s):  
M. Hagarová ◽  
D. Jakubéczyová ◽  
G. Baranová ◽  
M. Fujda
Keyword(s):  
Mechanical Properties ◽  
Mechanical Characteristics ◽  
Impact Test ◽  
Charpy Impact ◽  
Charpy Impact Test ◽  
Gas Pipeline ◽  
Charpy Test ◽  
Steel Sheets ◽  
Static Tensile ◽  
Parallel Direction

Abstract The paper deals with the mechanical properties of steel gas pipeline DN 500 after more than 40 years of operation. Mechanical properties of the pipeline were established by a tensile test at an ambient temperature according to the standard EN ISO 6892-1. The resistance of the pipeline against brittle failure was evaluated by using Charpy impact test according to EN 10045-1. The character of fracture surface after the Charpy test was analysed by using scanning electron microscopy. A high proportion of transcrystalline cleavage was a characteristic feature of fracture surfaces. Mechanical characteristics obtained by static tensile testing were compared with the values obtained from steel manufacturer. Higher elongation was observed in a parallel direction compared to the perpendicular direction to the axis of the pipe. The observed anisotropy of properties was related to the distribution of inclusions in the direction of the deformation of the steel sheets used for the pipeline construction.

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.

scholarly journals Investigation on Flexural Behavior of Geopolymer-Based Carbon Textile/Basalt Fiber Hybrid Composite

Polymers ◽  
2021 ◽  
Vol 13 (5) ◽  
pp. 751
Author(s):  
Chi Hiep Le ◽  
Petr Louda ◽  
Katarzyna Ewa Buczkowska ◽  
Iva Dufkova
Keyword(s):  
Flexural Strength ◽  
Hybrid Composite ◽  
Impact Test ◽  
Basalt Fiber ◽  
Charpy Impact ◽  
Charpy Impact Test ◽  
Flexural Behavior ◽  
Thin Plates ◽  
The One ◽  
Dose Levels

This paper presents an experimental research on the mechanical properties of the hybrid composite thin-plates of the short basalt fibers (CBFs)/carbon textile-reinforced geomortar. The effect of fiber contents and lengths of CBFs on the flexural behavior of carbon textile-reinforced geopolymer specimens (TRGs) was investigated by the four-point flexural strength and Charpy impact test. The experimental results of hybrid TRGs, on the one hand, were compared with reference TRGs, without CBF addition; on the other hand, they were compared with the results of our previous publication. According to the mixing manner applied, fresh geomortar indicated a marked reduction in workability, increasing the CBF loading. Furthermore, using CBFs with lengths of 12 mm and 24 mm makes it easy to form the fiber clusters in geomortar during mixing. According to all the CBF loadings used, it was found that TRGs showed a significant improvement in both static and dynamic flexural strength. However, the failure mode of these TRGs is similar to that of the reference TRGs, described by the process of fiber debonding or simultaneously fiber debonding and collapse. In comparison with our prior work results, neither the CBF dose levels nor the fiber lengths used in this work have yielded a positive effect on the failure manner of TRGs. According to the results of the Charpy impact test, this reveals that the anchoring capacity of textile layers in geomortar plays an important role in specimens’ strength.

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