A detailed FEM simulation of a 4-point bending test device

2012 ◽  
pp. 3-12 ◽  
Author(s):  
M Huurman ◽  
A Pronk
Keyword(s):  
Fem Simulation ◽  
Bending Test ◽  
Test Device

scholarly journals Experimental and Theoretical Study of Sandwich Panels with Steel Facesheets and GFRP Core

2016 ◽  
Vol 2016 ◽  
pp. 1-12 ◽  
Author(s):  
Hai Fang ◽  
Huiyuan Shi ◽  
Yue Wang ◽  
Yujun Qi ◽  
Weiqing Liu
Keyword(s):  
Fem Simulation ◽  
Sandwich Panels ◽  
Transformation Method ◽  
Steel Plates ◽  
Bending Test ◽  
Composite Sandwich ◽  
Four Point Bending ◽  
Reinforced Polymer ◽  
Glass Fiber Reinforced ◽  
Ultimate Failure

This study presented a new form of composite sandwich panels, with steel plates as facesheets and bonded glass fiber-reinforced polymer (GFRP) pultruded hollow square tubes as core. In this novel panel, GFRP and steel were optimally combined to obtain high bending stiffness, strength, and good ductility. Four-point bending test was implemented to analyze the distribution of the stress, strain, mid-span deflection, and the ultimate failure mode. A section transformation method was used to evaluate the stress and the mid-span deflection of the sandwich panels. The theoretical values, experimental results, and FEM simulation values are compared and appeared to be in good agreement. The influence of thickness of steel facesheet on mid-span deflection and stress was simulated. The results showed that the mid-span deflection and stress decreased and the decent speed was getting smaller as the thickness of steel facesheet increases. A most effective thickness of steel facesheet was advised.

Optimal Design and Experimental Investigations of Aluminium Extrusion Profiles for Lightweight of Car Bumper

2013 ◽  
Vol 585 ◽  
pp. 157-164 ◽  
Author(s):  
Jia Zhou ◽  
X.M. Wan ◽  
Y. Li ◽  
Q.J. Zhao
Keyword(s):  
Weight Reduction ◽  
Experimental Studies ◽  
Fem Simulation ◽  
Optimization Method ◽  
Bending Test ◽  
Crash Test ◽  
Experimental Investigations ◽  
Optimized Design ◽  
Extrusion Dies ◽  
Aluminium Extrusion

The present study aimed at developing an aluminium car bumper unit to replace the steel ones by using optimization based on experimental and FEM simulation results. The topology optimization method and response surface methodology (RSM) were applied in order to achieve an optimized design for the cross section of the crossbeam and the crash box, respectively. The three-points bending test and crash test for bumper unit were simulated to evaluate the optimization processes. The 6061 and 6063 aluminium alloy bumper unit has a weight reduction of 67% compared to the steel ones. The new extrusion dies were manufactured to produce profiles for the crossbeam and the crash box, respectively. Then the optimized extrusion profiles of crossbeam and crash box were verified by experimental studies. The performance tests were arranged to validate the experimental product. The mechanical properties of extruded aluminium crossbeam and crash box can satisfy the design requirements of products. The results indicate that the new designed unit can change the whole design of automotive parts for crash energy absorption, and definitely contribute to drastic weight reduction of steel parts.

scholarly journals Modeling Shear Behavior of Woven Fabric Thermoplastic Composites for Crash Simulations

2020 ◽  
Vol 27 (6) ◽  
pp. 739-765
Author(s):  
Bilal Ahmad ◽  
Xiangfan Fang
Keyword(s):  
Damage Mechanics ◽  
Pure Shear ◽  
Fem Simulation ◽  
Shear Behavior ◽  
Woven Fabric ◽  
Bending Test ◽  
Thermoplastic Composites ◽  
Fiber Direction ◽  
Single Element ◽  
Full Potential

AbstractWoven fabric thermoplastic composites possess high specific strength and stiffness along with thermoformability. To utilize the full potential of these materials to achieve better crash-safe designs in automotive structural parts, the measurement of non-linear shear behavior and its material modeling for FEM simulations is required. The standard testing method was used to measure the pure shear behavior of woven fabric composites. These results were compared with the shear behavior of material in the presence of normal stresses along the fiber direction. Tensile and compression cyclic testing of ± 45° laminate were carried out to measure the stiffness degradation and hardening of the material in the presence of tensile normal and compression normal stress. A methodology is proposed for taking into account the differences in shear behavior under different loading directions in an FEM simulation. Based on the experimental evidence, improvements in the mathematical description of plasticity and damage in continuum damage mechanics models are proposed. The model was implemented as a user-defined material subroutine (VUMAT) for Abaqus. The experimental results from coupon tests were used to verify the results of a single element simulation. Finally, a three-point bending test was used to validate the predictions of the user material model.

scholarly journals Possible sources of acoustic emission during static bending test of wood specimens

2012 ◽  
Vol 60 (3) ◽  
pp. 199-206 ◽  
Author(s):  
David Varner ◽  
Michal Černý ◽  
Miroslav Varner ◽  
Martin Fajman
Keyword(s):  
Acoustic Emission ◽  
Wood Specimen ◽  
Fem Simulation ◽  
Bending Test ◽  
Failure Behavior ◽  
Emission Sources ◽  
Direct Connection ◽  
Final Fracture ◽  
Lower Baseline ◽  
Central Support

The paper is dedicated to identification of sources of acoustic emission generated during static bending test of wood specimen. Information on wood structure, wood failure behavior and computer-generated finite element method (FEM) simulation of static bending test were used to localize and estimate power of individual acoustic emission sources. Significant acoustic emission sources are expected in the specimen in two areas: under the upper central support (during the entire bending test run) and in the tension portion of the specimen at the centre of lower baseline (at the fracture/destruction time). Strong acoustic emission sources were registered in tension portion of the specimen in direct connection with final fracture of specimen.

scholarly journals Load-carrying capacity of the GFRP and CFRP composite beams subjected to three-point bending test – numerical investigations

2019 ◽  
Vol 23 (1) ◽  
pp. 277-286
Author(s):  
Dominik Banat
Keyword(s):  
Carbon Fibre ◽  
Composite Beam ◽  
Failure Modes ◽  
Fem Simulation ◽  
Composite Beams ◽  
Bending Test ◽  
Shear Stresses ◽  
Three Point Bending ◽  
Reinforced Polymer ◽  
Fibre Reinforced Polymer

Abstract The subject of this article is the finite element method (FEM) simulation of the multi-layered rectangular composite beam subjected to three-point bending test. The study is focused on the composite beams made of glass or carbon fibre-reinforced laminates (glass fibre-reinforced polymer [GFRP] and carbon fibre-reinforced polymer [CFRP]) for which different laminate stacking were addressed. Three beam geometries with various length-to-thickness ratios included short beam shear (SBS) test, provided the beam is short relative to its thickness, which maximised the induced shear stresses. Simulation included the application of Tsai–Hill, Hoffman, Tsai–Wu, Hashin and Puck failure criteria to perform the composite beam failure analysis wherein the matrix and fibre failure were considered separately. Numerical failure studies also aimed to verify the beam failure modes and the participation of stress tensor elements in material failure.

Development of a Bending-Test Device for Small Samples

1997 ◽  
Vol 132-136 ◽  
pp. 488-491 ◽  
Author(s):  
Tanja Lube ◽  
Markus Manner
Keyword(s):  
Bending Test ◽  
Small Samples ◽  
Test Device

scholarly journals FEM simulation of three-point bending test of Inconel 718 coating on stainless steel substrate

2018 ◽  
Vol 21 ◽  
pp. 248-252 ◽  
Author(s):  
Amit Kumar Singh ◽  
Rajnesh Tyagi ◽  
Vinayak Ranjan ◽  
Prabhakar Sathujoda
Keyword(s):  
Stainless Steel ◽  
Inconel 718 ◽  
Stainless Steel Substrate ◽  
Steel Substrate ◽  
Fem Simulation ◽  
Bending Test ◽  
Three Point Bending

Effect of Stress and Relax Instructions on the Predictive Validity of a Test Device

1974 ◽  
Vol 7 (1) ◽  
pp. 46-50 ◽  
Author(s):  
Bruce W. Hall ◽  
T. Salvatore Tocco ◽  
Larry S. Schwartz
Keyword(s):  
Predictive Validity ◽  
Test Device

Development Path of Anthropomorphic Test Device with Chinese Physical Signs

2019 ◽  
Vol 21 (3) ◽  
pp. 103
Author(s):  
Zhixin Liu ◽  
Yongqiang Wu ◽  
Weijie Ma
Keyword(s):  
Test Device ◽  
Development Path
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