Development and Validation of Offset Deformable Barrier Model with Beam Element

2011 ◽  
Vol 128-129 ◽  
pp. 1139-1142
Author(s):  
Li Bo Cao ◽  
Wen Tao Cheng ◽  
Xiang Nan Shi ◽  
Jie Chen ◽  
Li Quan
Keyword(s):  
Element Model ◽  
Local Deformation ◽  
Deformation Characteristics ◽  
Static Compression ◽  
Shell Elements ◽  
Sled Test ◽  
Beam Elements ◽  
Development And Validation ◽  
The Finite Element Model ◽  
Quasi Static Compression

According to GB/T 20913-2007 regulation, the finite element model of the offset deformable barrier (ODB) was built with beam and shell elements, and validated in the simulation of quasi-static compression test. In order to analyze the local deformation characteristics of the ODB model, a sled test was designed. A cylinder impactor of 110 mm in diameter was welded in front of the sled. It was used to impact the fixed ODB. The simulation model of this test was also built. The acceleration of the sled and the deformation of the ODB were measured in the test and compared with the simulation data. The results show that the ODB model with beam elements not only satisfies the demands of the regulations, but also has good local deformation characteristics. The efficiency of computing can be improved obviously with beam elements.

Material Constitutive Model of 2Cr13 for FEA of Chip Formation Process

2007 ◽  
Vol 10-12 ◽  
pp. 796-800 ◽  
Author(s):  
L. Li ◽  
L.J. Xie ◽  
Xin Bing Wang ◽  
L. Wang ◽  
J. Xie ◽  
...  
Keyword(s):  
Experimental Data ◽  
Prediction Accuracy ◽  
High Strain ◽  
Orthogonal Cutting ◽  
Nonlinear Behavior ◽  
Element Model ◽  
Static Compression ◽  
Material Equation ◽  
The Finite Element Model ◽  
Quasi Static Compression

The prediction accuracy of the simulation of cutting process is related with the description of the nonlinear behavior of material at extremely high strain, strain rate and temperature in machining. In this paper, an integral Johnson-Cook model is presented to characterize the mechanical behavior of work materials in machining, and the parameters in the model are determined by fitting the data from both quasi-static compression and cutting tests. Then the material equation of 2Cr13 stainless steel is derived with this method and used in the finite element model of orthogonal cutting with carbide tools. At last, the simulation result is verified with experimental data.

A Novel Method for Determining the Stiffness of a Composite Structure Resulting from the Manufacturing Process Using a Discrete Mesoscopic Finite Element Model

2015 ◽  
Vol 651-653 ◽  
pp. 399-404
Author(s):  
Cynthia J. Mitchell ◽  
James A. Sherwood ◽  
Lisa M. Dangora ◽  
Jennifer L. Gorczyca
Keyword(s):  
Finite Element ◽  
Finite Element Model ◽  
Element Model ◽  
Shell Elements ◽  
Forming Simulation ◽  
Beam Elements ◽  
Fiber Reinforcements ◽  
Novel Method ◽  
Shell Forming ◽  
The Finite Element Model

This paper presents a methodology for extending the use of the beam-shell forming model to predict the structural properties of the composite part. After the forming simulation has been performed, the material definition will be changed such that the beam elements will represent the fiber reinforcements and the shell elements will represent the resin. The methodology behind the entire approach will be demonstrated using a stitched uniaxial glass fabric. The methodology for characterizing the fabric behavior will be discussed. After the part has been formed, it will be infused with resin. The methodology for characterizing the composite behavior will be introduced. The finite element model will be compared with experimental data to validate the methodology.

Finite Element Modeling of Unidirectional Non-Crimp Fabric for Manufacturing of Composites with Embedded Cabling

2013 ◽  
Vol 554-557 ◽  
pp. 484-491 ◽  
Author(s):  
Alexander S. Petrov ◽  
James A. Sherwood ◽  
Konstantine A. Fetfatsidis ◽  
Cynthia J. Mitchell
Keyword(s):  
Finite Element ◽  
Finite Element Model ◽  
Element Model ◽  
Explicit Finite Element ◽  
Shell Elements ◽  
Beam Elements ◽  
Hybrid Finite Element ◽  
International Benchmarking ◽  
Unidirectional Glass ◽  
Forming Simulations

A hybrid finite element discrete mesoscopic approach is used to model the forming of composite parts using a unidirectional glass prepreg non-crimp fabric (NCF). The tensile behavior of the fabric is represented using 1-D beam elements, and the shearing behavior is captured using 2-D shell elements into an ABAQUS/Explicit finite element model via a user-defined material subroutine. The forming of a hemisphere is simulated using a finite element model of the fabric, and the results are compared to a thermostamped part as a demonstration of the capabilities of the used methodology. Forming simulations using a double-dome geometry, which has been used in an international benchmarking program, were then performed with the validated finite element model to explore the ability of the unidirectional fabric to accommodate the presence of interlaminate cabling.

Modeling Method of Assembled Structure Coupling the Characteristics of the Joints

2012 ◽  
Vol 468-471 ◽  
pp. 2141-2148
Author(s):  
Tie Neng Guo ◽  
Xue Li Yu ◽  
Fu Ping Li ◽  
Li Gang Cai ◽  
Ya Hui Cui
Keyword(s):  
Mechanical Properties ◽  
Mechanical Characteristics ◽  
Element Model ◽  
Experimental Investigations ◽  
Beam Elements ◽  
Joint Characteristics ◽  
Proposed Model ◽  
Mechanics Analysis ◽  
Stiffness And Damping ◽  
The Finite Element Model

Mechanical properties of the joints have impacted on the whole mechanical characteristics. Coupling the joint characteristics in the modeling of the machine tool is an important problem in machine mechanics analysis. In order to solve the joint modellings in the assembled structure, this paper presents a new method to creat beam elements between two symmetrical nodes on the contact surface of the joint. The stiffness and damping matrices of the elements are valuated according to the characteristics of the joint. To validate the accuracy of the proposed method, the modeling of an assembled structure with and without the joints is obtained and some corresponding experimental investigations are implemented. The error between the simulated and experimental results of the finite element model is less than 8.8%, while the error of the contact model often used in the existing literatures is one times bigger than the proposed model.

scholarly journals Application of Finite Element Method for Analysis of Nanostructures

2017 ◽  
Vol 11 (2) ◽  
pp. 116-120 ◽  
Author(s):  
Jozef Bocko ◽  
Pavol Lengvarský
Keyword(s):  
Finite Element Method ◽  
Finite Element ◽  
Element Model ◽  
Geometrical Parameters ◽  
The Finite Element Method ◽  
Beam Elements ◽  
Stiffness Properties ◽  
Force Displacement ◽  
The Finite Element Model ◽  
Element Method

AbstractThe paper deals with application of the finite element method in modelling and simulation of nanostructures. The finite element model is based on beam elements with stiffness properties gained from the quantum mechanics and nonlinear spring elements with force-displacement relation are gained from Morse potential. Several basic mechanical properties of structures are computed by homogenization of nanostructure, e.g. Young's modulus, Poisson's ratio. The problems connecting with geometrical parameters of nanostructures are considered and their influences to resulting homogenized quantities are mentioned.

Compression Experiment And Failure Analysis of Additive Manufactured Multi-Layer Lattice Sandwich Structure

2021 ◽  
Author(s):  
Jun Yan ◽  
Cuncun Jiang ◽  
Zhirui Fan ◽  
Qi Xu ◽  
Hongze Du ◽  
...  
Keyword(s):  
Finite Element ◽  
Finite Element Model ◽  
Failure Mode ◽  
Sandwich Structure ◽  
Sandwich Structures ◽  
Element Model ◽  
Structural Deformation ◽  
Displacement Curve ◽  
Static Compression ◽  
Quasi Static Compression

The rapid development of additive manufacturing technology provides a new opportunity for the fabrication and research of multi-layer lattice sandwich structures, and thereby some excellent performances can be further discovered. Based on the manufacturing-experiment-analysis technical route, the failure mode of the additive manufactured aluminum multi-layer alloy lattice sandwich structure under quasi-static compression is systematically studied in this paper. Through the combination of experimental observation and finite element analysis, the complex failure mechanism of the multi-layer lattice sandwich structure is revealed. The results show that the multi-layer lattice sandwich structure under quasi-static compression conditions mainly manifests as a layer-by-layer failure mode of the internal lattice structure, which includes the yield, plastic buckling and material damage. At the same time, in comparison with the force–displacement curve and the structural deformation in the key locations, the analysis accuracy of the finite element model can be verified by the compression experiment. Based on the verified finite element model, the most significant influence of different face panel thicknesses, as well the rod radiuses and tilting angles on the energy absorption (EA) is identified via sensitivity analysis. Furthermore, size factors on the structural EA are revealed. This study can provide a helpful guidance for the design of multi-layer lattice sandwich structures in practical applications.

The Modeling and Application of Moving Deformable Barrier Model with Beam Element

2011 ◽  
Vol 80-81 ◽  
pp. 922-926 ◽  
Author(s):  
Li Bo Cao ◽  
Wen Tao Cheng ◽  
Xiang Nan Shi
Keyword(s):  
Element Model ◽  
Local Characteristic ◽  
Beam Elements ◽  
Side Impacts ◽  
Key Points ◽  
Aluminum Honeycomb ◽  
Moving Deformable Barrier ◽  
Set Up ◽  
The Finite Element Model ◽  
Barrier Model

According to GB 20071-2006 regulation, the finite element model of aluminum honeycomb block was built with beam elements, and the corresponding moving deformable barrier (MDB) model was validated. Side impacts between a vehicle and the MDBs which were set up with beam elements and solid elements respectively, were simulated. The velocities of five key points on the B pillar and the door were measured and compared with the test data. The results show that the demands of the regulations could be achieved by the MDB with beam elements, while at the same time, the efficiency of computing is improved and better local characteristic is obtained.

scholarly journals Rotational Restraint to Purlins Provided by Standing Seam Roof Systems

2019 ◽  
Vol 2019 ◽  
pp. 1-8 ◽  
Author(s):  
Qin Yang ◽  
Wei Luan ◽  
Shaole Yu ◽  
Junjie Chen
Keyword(s):  
Finite Element ◽  
Finite Element Model ◽  
Parametric Analysis ◽  
Element Model ◽  
Local Deformation ◽  
Rotational Restraint ◽  
Restraint Mechanism ◽  
Roof Panel ◽  
Panel Thickness ◽  
The Finite Element Model

The finite element model used for analyzing the rotational restraint rigidity of standing seam roof systems was developed. The influences of different factors on the rotational restraint rigidity provided by two types of standing seam roof systems were studied. The variables include local deformation of standing seam roof panels, panel thickness, clip tab thickness, and the relative sliding of clip tab and clip base. The restraint mechanism of standing seam roof systems to the purlins was studied. It is shown that the rotational restraint rigidity provided by the two types of researching standing seam roof systems mainly depends on the slide tab thickness and the roof panel thickness. Finally, formulae for calculating rotational restraint rigidity of the LSIII and SS360 standing seam roof systems were also proposed based on parametric analysis results.

Characterization and Finite Element Modeling of Unidirectional Non-Crimp Fabric for Composite Manufacturing

2012 ◽  
Vol 504-506 ◽  
pp. 225-230 ◽  
Author(s):  
Alexander Petrov ◽  
James A. Sherwood ◽  
Konstantine A. Fetfatsidis
Keyword(s):  
Finite Element ◽  
Finite Element Model ◽  
Element Model ◽  
Explicit Finite Element ◽  
Shell Elements ◽  
Beam Elements ◽  
Hybrid Finite Element ◽  
International Benchmarking ◽  
Characterization Test ◽  
Shear Frame

A hybrid finite element discrete mesoscopic approach is proposed to model the forming of composite parts using a unidirectional glass prepreg non-crimp fabric (NCF). The tensile behavior of the fabric is represented using 1-D beam elements, and the shearing behavior is captured using 2-D shell elements. The material is characterized using tensile and shear frame tests. These properties are then incorporated into an ABAQUS/Explicit finite element model via user-defined material subroutines. The shear frame characterization test is simulated using a finite element model of the fabric, and the finite element results are compared to experimental data as a validation of the methodology. The thermostamping of a double-dome geometry, which has been used in an international benchmarking program, is modeled as a demonstration of the capabilities of the proposed methodology.

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