FE Simulation Results

2021 ◽  
pp. 57-77
Author(s):  
Christian B. Silbermann ◽  
Matthias Baitsch ◽  
Jörn Ihlemann
Keyword(s):  
Fe Simulation ◽  
Simulation Results

In-Plane Quasi-Static Crushing of Cissoidal Hexagonal Honeycomb Cores

2012 ◽  
Vol 446-449 ◽  
pp. 3736-3739 ◽  
Author(s):  
De Qiang Sun ◽  
Miao Liu ◽  
Ying Xue Zhu
Keyword(s):  
Fe Simulation ◽  
Edge Length ◽  
Mechanical Behaviors ◽  
Response Curves ◽  
Plateau Stress ◽  
Deformation Processes ◽  
Simulation Results ◽  
Data Tables ◽  
Honeycomb Cores ◽  
Force Displacement

The mechanical behaviors of cissoidal hexagonal cores (CHCs) are investigated by using the finite element (FE) simulations under the in-plane quasi-static crushing loadings. The calculated deformation processes, response curves and values of plateau stress are presented in the forms of diagrams, force-displacement curves or data tables, respectively. The influences of ratio of cell wall thickness to edge length and expanding angle on the quasi-static plateau stress are discussed in detail. The empirical expressions of quasi-static plateau stress in terms of configuration parameters are given based on the FE simulation results.

Comparing Study on Real Drawbead and Equivalent Drawbead Based on Finite Element Analysis

2012 ◽  
Vol 430-432 ◽  
pp. 1056-1059
Author(s):  
Xiao Gang Qiu ◽  
Hao Huang
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Deformation Behavior ◽  
Fe Simulation ◽  
Element Analysis ◽  
Explicit Finite Element ◽  
The Real ◽  
Finite Element Software ◽  
Simulation Results ◽  
Virtual Velocity

The dynamic explicit finite element software DYNAFORM was used to simulate the real and equivalent drawbead model. Analyzed the influence of the blank hold force (BHF) and virtual velocity on blank’s deformation behavior after passing through drawbead, compared the results of the FE simulation. The simulation results were confirmed by experiments. The study shows that the equivalent drawbead model can’t simulate the blank’s behavior precisely when it passing the real drawbeads, the effect of BHF on real drawbead model is larger than equal drawbead model; the proper range of virtual velocity was obtained at the same time.

Stability Analysis of a Reach Truck

2009 ◽  
Author(s):  
Jong-Su Bae ◽  
Taewung Kim ◽  
Hyun-Yong Jeong
Keyword(s):  
Stability Analysis ◽  
Variational Method ◽  
Potential Function ◽  
Fe Simulation ◽  
Safety Concern ◽  
Mathematical Tool ◽  
Total Potential ◽  
Pitch Direction ◽  
Simulation Results ◽  
The Stability

There is a need for a higher mast of a reach truck in the market, but a higher mast brings a safety concern. Usually, it is more plausible to fall in the roll direction than in the pitch direction. Since a reach truck with a high mast is a heavy and its center of gravity is high, it is not easy to conduct tests to evaluate its stability. If there is a mathematical tool to evaluate the stability of a reach truck, it is easy to evaluate a design in terms of stability and to modify the design in order to increase its stability. In this study, a variational method using a total potential function was used to make a mathematical means to evaluate the stability of a reach truck. By using the mathematical means the stability of a reach truck was evaluated and compared with FE simulation results.

Deformation and Failure Behaviors of PC/ABS (50/50) Blends under Impact

2007 ◽  
Vol 340-341 ◽  
pp. 319-324
Author(s):  
M. Nizar Machmud ◽  
Masaki Omiya ◽  
Hirotsugu Inoue ◽  
Kikuo Kishimoto
Keyword(s):  
Room Temperature ◽  
Impact Test ◽  
Fe Simulation ◽  
Line Strength ◽  
Weld Line ◽  
Deformation And Failure ◽  
Loading Rates ◽  
Preliminary Study ◽  
Weight Impact ◽  
Simulation Results

An instrumented-drop weight impact test carried out at room temperature under a range of loading rates was applied to study the deformation and failure behaviors of PC/ABS (50/50) blends. Actually, these blends have different type of ABS, one grade of the blends is the blend containing small-sized particles of rubber and another grade is the blend containing larger-sized particles of rubber in the ABS systems. Testing results showed that both of the blends generally exhibited similar behaviors but they were totally different under 3 m/sec. A weld line-like formation captured on the fracture surface was found in each of the blends. Preliminary study using scanning electron microscope (SEM) indicated that crack also propagated along the weld line. Fracture of the blends might be initially induced due to fracture of the weld lines. Hence, it has been suspected as a factor affecting behavior of the blends. Since existence of the weld line-like formation has not been found in fractured ABS materials, it is necessary to point out the complex relationship among of the ABS composition, the existence of the weld line and the weld line quality in the blends. A finite element (FE) simulation of the testing was carried in order to determine whether the weld line strength is significant enough affects the behaviors. Although the model was generated using estimated failure criterion for the weld line, the simulation results showed that weld line strength might influence the blends behavior.

scholarly journals A Study on the Application of Two Different Material Constitutive Models Used in the FE Simulation of the Cyclic Plastic Behavior of a Steel Beam-Column T-Stub Connection

2021 ◽  
Vol 2021 ◽  
pp. 1-14
Author(s):  
Wei Wang ◽  
Chenchen Zhang ◽  
Zeshen Li ◽  
Xuehong Gan
Keyword(s):  
Fe Simulation ◽  
Constitutive Models ◽  
Steel Structures ◽  
Experimental Results ◽  
Isotropic Hardening ◽  
Plastic Behavior ◽  
Q235 Steel ◽  
Cyclic Plastic ◽  
Cause Of Failure ◽  
Simulation Results

Seismic actions inevitably cause cyclic plastic deformations in steel frame connections, which is a common cause of failure in steel structures. Nonlinear finite element (FE) static analysis has been employed in the study of the cyclic plastic behavior of a T-stub connection based on the reported cyclic test on the corresponding extensively tested T-stub connection made of Q235 steel. In particular, the isotropic-hardening and Chaboche constitutive models were employed to predict both the stress distribution and plastic development on the T-stub and the hysteretic curves of the entire T-stub connection. The two constitutive models were calibrated by four material tests to describe the yield and hardening behaviors of the Q235 steel used to make this T-stub connection. The two sets of simulation results obtained from the simulations of the two FE models employed by the two different constitutive models were compared with each other and with the experimental results. The comparisons reveal that the simulation results are similar and in good agreement with the experimental results when the cumulative plastic deformation in the T-stub is small. However, the results of the FE analysis using the Chaboche model are in better agreement with the experimental results when the cumulative deformation in the T-sub is large. This study can provide a reference for FE simulation of the cyclic plastic behavior of steel connections, including the T-stub connection.

Simulation Behaviour of Precast Concrete Connection with Embedded Box Section under Static Loading

2015 ◽  
Vol 74 (3) ◽  
Author(s):  
Mehdi Rezaei ◽  
S. A. Osman ◽  
N. E. Shanmugam ◽  
A. A. Mutalib
Keyword(s):  
Static Loading ◽  
Concrete Beam ◽  
Ultimate Load ◽  
Fe Simulation ◽  
Precast Concrete ◽  
Effective Width ◽  
Box Section ◽  
Vertical Loading ◽  
Simulation Results ◽  
Steel Section

This study is concerned with 18 precast concrete beam-column connections incorporating embedded steel box-section using Finite Element (EF) modelling. The variables considered were: length and width of the embedded steel member. The results indicate that connection containing a wider flange of the embedded member can resist more vertical loading. Also, the deflection at ultimate load increases as the width of the embedded steel section increase. Generally, there are a few design methods available in the codes; this study also evaluates the available design formulas using FE simulation results and the data from other researchers. From the evaluation and the analysis it was shown that twice the width of the embedded width should be taken as the effective width of the connection when the PCI (Precast Concrete Institute) design equations are used.  

Double-Billet Incremental ECAP

2008 ◽  
Vol 584-586 ◽  
pp. 139-144 ◽  
Author(s):  
Andrzej Rosochowski ◽  
Lech Olejnik ◽  
Maria W. Richert
Keyword(s):  
Finite Element ◽  
Tensile Properties ◽  
Fe Simulation ◽  
Fe Method ◽  
Continuous Processes ◽  
Attractive Option ◽  
Simulation Results ◽  
Experimental Rig ◽  
Process Productivity ◽  
Limited Scope

Batch SPD processes have a limited scope for being used on an industrial scale. More feasible are continuous processes among which the new SPD process of Incremental ECAP (IECAP) is an attractive option. In this paper, a double-billet version of I-ECAP, which doubles process productivity, is presented. The concept of the process is first checked using the finite element (FE) method. FE simulation results are the basis for the design of an experimental rig. Trials of nanostructuring of 10x10x200 Al 1070 billets are carried out with the forces on the reciprocating die and the feeder measured. Metallurgical samples after 4 and 8 passes of I-ECAP (route BC) are investigated using TEM. Tensile properties after 8 passes are established. All these results show that the new SPD process of I-ECAP gives the results comparable to those obtained by a classical batch ECAP with the added capability of dealing with much longer (possibly infinite) billets.

scholarly journals General Research on the Process of the Indirect Hot Stamping Ultra-High-Strength Steel

Metals ◽  
2020 ◽  
Vol 10 (12) ◽  
pp. 1658
Author(s):  
Ziming Tang ◽  
Zhengwei Gu ◽  
Xin Li ◽  
Lijuan Zhu ◽  
Hong Xu ◽  
...  
Keyword(s):  
High Strength Steel ◽  
Fe Simulation ◽  
Hot Stamping ◽  
High Strength ◽  
Tensile Tests ◽  
Punch Speed ◽  
Ultra High Strength Steel ◽  
Simulation Results ◽  
Two Stages ◽  
Quenching Time

Aiming at the need for lightweight requirements of the components in the bus, combined with the advantages of the hot stamping ultra-high-strength steel, a new television (TV) bracket was proposed. The finite element (FE) simulation of the beam part in the TV bracket during the indirect hot stamping process was discussed. After two-stages of pre-forming, the blank was in good formability and without visible cracks. According to the FE simulation results, the punch speed, quenching force, and quenching time significantly affected the temperature, microstructure, hardness, and mechanical properties of the beam part during hot stamping. With the increase of the quenching force and quenching time, the martensite fraction of the beam part was increased. For the beam part, the punch speed should be at least 80 mm/s during the forming stage. For complete quenching, the quenching force should be above 1000 kN and quenching time should be up to 10 s. Based on the parameters from the FE simulation, the forming experiment of the beam part was discussed. Microstructure analyses and microhardness tests as well as tensile tests of the hot stamping beam part were performed. The results confirmed that the FE simulation of the beam part was reliable.

scholarly journals RESEARCH OF EFFECTS OF DEFECTS ON STABILITY FAILURES OF SEMI-MONOCOQUE STIFFENERS

Aviation ◽  
2020 ◽  
Vol 23 (3) ◽  
pp. 83-90
Author(s):  
Tomáš Katrňák ◽  
Jaroslav Juračka ◽  
Ivo Jebáček
Keyword(s):  
Fe Simulation ◽  
Local Buckling ◽  
Experimental Tests ◽  
Nonlinear Finite Element ◽  
Design Parameters ◽  
Local Mode ◽  
Single Node ◽  
Sudden Failure ◽  
Simulation Results ◽  
Validation Of Results

This article presents further results of the research of effects of model defects on the local buckling of compressed stiffeners in nonlinear finite element (FE) analyses. The main outcomes are confirmation of trends for 10 sets of profile dimensions, final validations of various sets of FE simulations, and designs of practical types of defects with appropriate ratio values. A single node defect and then complex types of defects with alternating distributions of node shifts along one edge, two free flange edges, one flange surface and both flange surfaces are analyzed in this research project. First parts of this paper describe designed FE models with defects, their effects on simulation results, colored graphic visualizations with stress scales and determinations of the sudden failure of stability in the local mode. Then, particular results of FE analyses are validated by a comparison with the results of analytical methods of stability failure. Final detail comparisons of analytical and FE simulation results with data of experimental tests confirm predicted critical buckling forces. The validation of results and design parameters together with the knowledge of effects of model defects on buckling behaviors allows more accurate simulations of internal stiffeners of thin-walled semi-monocoque structures.

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