The Tensile Test Study of the Flange Repaired Reinforcement Laminates

2013 ◽  
Vol 694-697 ◽  
pp. 163-167
Author(s):  
Nan Zheng ◽  
Yi Wang ◽  
Xiao Xia Chen
Keyword(s):  
Finite Element ◽  
Tensile Test ◽  
Finite Element Model ◽  
Element Model ◽  
Test Results ◽  
Static Tensile Test ◽  
Test Study ◽  
Static Tensile ◽  
The Finite Element Model

The static tensile test and the Finite Element Model (FEM) study of the flange repaired cut-out laminates were carried out in this work. The tensile test is focus on the strength of the flange reinforcement panel and unreinforced panel. The FEM studies on the reinforcement and unrepaired structure is focused on simulation of the tensile test. The test results indicated that the strain value decreased as the size of load is. The FEM results indicated that the maximum Mises stress value of the flange repaired panel is decreased by 16.08% than the unreinforced.

Tension and shear block failure of bolted gusset plates

2006 ◽  
Vol 33 (4) ◽  
pp. 395-408 ◽  
Author(s):  
Bino B.S Huns ◽  
Gilbert Y Grondin ◽  
Robert G Driver
Keyword(s):  
Finite Element ◽  
Finite Element Model ◽  
Element Model ◽  
Test Results ◽  
Limit States ◽  
Gusset Plates ◽  
Gusset Plate ◽  
Current Design ◽  
Shear Block ◽  
The Finite Element Model

Despite the large database of test results for tension and shear block failure in gusset plates, the exact progression of the failure mechanism is not clear. Although current design equations predict the capacity of gusset plates fairly well, it is important for a design equation to not only predict the capacity reliably but also reflect the failure mode accurately. Recent experimental and numerical research has indicated that current design equations do not always predict the failure behaviour accurately. A finite element model was therefore developed to predict the sequence of events that leads to the tear-out of a block of material from a bolted gusset plate in tension. The model was developed to provide a useful tool for studying tension and shear block failure in gusset plates and other structural elements. This paper presents the development of the finite element model and procedure for prediction of tension and shear block failure in gusset plates. Making use of the finite element model, the database of test results is also expanded to include gusset plates with a larger number of transverse lines of bolts than what has been obtained experimentally. A reliability analysis is used to assess several design equations, including the equation adopted in CAN/CSA-S16-01 and a unified equation proposed recently for several types of bolted connections. From this work, a limit states design equation is proposed for gusset plates.Key words: gusset plate, limit states design, reliability, shear rupture, tension rupture, finite element analysis, failure criterion.

scholarly journals Experimental and Numerical Simulation of the Tensile Behaviour of a Biaxial Warp-knitted Composite

2018 ◽  
Vol 26 (6(132)) ◽  
pp. 71-76
Author(s):  
Xiaoping Gao ◽  
Xiaori Yang ◽  
Danxi Li ◽  
Yonggui Li
Keyword(s):  
Finite Element ◽  
Finite Element Model ◽  
Element Model ◽  
Dynamic Mechanical Properties ◽  
Tensile Behaviour ◽  
Knitted Fabric ◽  
Static Tensile ◽  
Warp Knitted Fabric ◽  
The Finite Element Model ◽  
Meso Scale

In this paper a composite reinforced with biaxial warp-knitted fabric and epoxy resin was manufactured by applying vacuum assisted resin transfer moldings (VARTM). The quasi- -static tensile behaviour was experimentally tested in 0° and 90° directions, respectively. A finite element model of biaxial warp-knitted composites was developed on a meso-scale. The tensile behaviour of the composites was numerical simulated and compared with the experimental results. It showed that there is an approximate agreement between experimental and numerical results. There are maximum errors sum of squares of 14.52% and 33.29%. The finite element model of biaxial warp-knitted composites has higher accuracy, which can be used to study the static and dynamic mechanical properties.

A Truck Cab Abnormal Vibration Test and Analysis

2013 ◽  
Vol 416-417 ◽  
pp. 1803-1807
Author(s):  
Qiang Li ◽  
Yan Fang Liu ◽  
Xiang Yang Xu
Keyword(s):  
Finite Element ◽  
Finite Element Model ◽  
Element Model ◽  
Radial Force ◽  
Test Results ◽  
Element Simulation ◽  
Force Variation ◽  
Specific Speed ◽  
The Finite Element Model

This paper introduces a combination of testing and finite element simulation for the abnormal vibration of a truck cab in specific speed. Vibration characteristics of the truck is tested. The factors that caused the abnormal vibration of the truck is found. The finite element model is established and the modal analysis is performed, the correctness of the test results is verified, and a reliable finite element model for the follow-up solution is provided. The abnormal vibration was caused by the frequencies of radial force variation which almost equal to the truck natural frequency under the vehicle velocities of 50km/h. The approach described in this paper can be applied to similar vibration problem diagnosis.

FEM Analysis and Optimization of Large Load Suspended Platform

2012 ◽  
Vol 569 ◽  
pp. 415-419
Author(s):  
Xi Jian Zheng ◽  
Yong Shang Han ◽  
Zheng Yi Xie
Keyword(s):  
Finite Element Method ◽  
Finite Element Analysis ◽  
Finite Element ◽  
Finite Element Model ◽  
Fem Analysis ◽  
Element Model ◽  
Test Results ◽  
The Finite Element Method ◽  
Element Analysis ◽  
The Finite Element Model

Based on the Finite Element Method, the suspended platform of temporarily installed suspended access equipment was simplified and the special connection positions were dealt with rigidization and coupling, thus the finite element model of suspended platform was established. Analyzing major structures of finite element model in different section dimensions, the reasonable scheme could be ascertained and the section dimensions of major structures in different materials could be obtained. Combining with the test results, the rationality of finite element analysis could be proved. The study could provide reference for the similar products on design and development.

Research on Crashworthiness of Car Bumper System

2013 ◽  
Vol 753-755 ◽  
pp. 1274-1278
Author(s):  
Xiu Chun Wu ◽  
Guo Hong Tian ◽  
Jie Liu
Keyword(s):  
Finite Element ◽  
Finite Element Model ◽  
Element Model ◽  
Simulation Method ◽  
Cad Model ◽  
Test Results ◽  
Crash Simulation ◽  
Simulation Results ◽  
The Finite Element Model ◽  
Bumper System

The computer simulation method is used to study the crashworthiness of car bumper system. Firstly, the CAD model of the car and bumper system is established in CATIA. The pre-processing for the model is finished in Hyper-Mesh and the finite element model is established. Then the process of crash simulation is calculated in Pam-Crash. The simulation results are compared with the test results to verify the accuracy of the finite element model. Finally, the low-speed crash simulation of the bumper system is conducted. The crash displacement and deformation of the bumper system are forecast through the process of simulation, which can provide a reference for the next design and improvement.

Aluminium alloy channels subjected to web crippling

2019 ◽  
Vol 22 (7) ◽  
pp. 1617-1630 ◽  
Author(s):  
Feng Zhou ◽  
Ben Young
Keyword(s):  
Finite Element ◽  
Finite Element Model ◽  
Aluminium Alloy ◽  
Failure Modes ◽  
Element Model ◽  
Test Results ◽  
Web Crippling ◽  
Web Buckling ◽  
The Finite Element Model ◽  
The Web

This article reports experimental and numerical investigations of aluminium alloy plain and lipped channels subjected to web crippling. A total of 240 data are presented that include 24 test results and 216 numerical results. A series of tests was conducted first on channels fabricated by extrusion using 6063-T5 and 6061-T6 heat-treated aluminium alloys under end-two-flange and interior-two-flange loading conditions. The concentrate transverse loads were applied by means of bearing plates. The flanges of the specimens were not fastened (unrestrained) to the bearing plates. A non-linear finite element model is then developed and verified against experimental results. Geometric and material non-linearities were included in the finite element model. It was shown that the finite element model closely predicted the web crippling strengths and failure modes of the tested specimens. Hence, the model was used for an extensive parametric study of cross-section geometries, and the web slenderness value ranged from 24.0 to 207.3. The test results and the web crippling strengths predicted from the finite element analysis were compared with the design strengths obtained using the American, Australian/New Zealand and European specifications for aluminium structures. An empirical unified web crippling equation with new coefficients for aluminium alloy channels under end-two-flange and interior-two-flange loading conditions is proposed. Since two failure modes of web buckling and web yielding were observed in the tests, the web crippling strength is also predicted using the proposed theoretical design rules for channels. The web crippling strength is the lesser of the web buckling strength and web yield strength.

Prediction of Effective Material Property of Tailor Welded Blanks for Air Bending Process

2012 ◽  
Vol 472-475 ◽  
pp. 761-766
Author(s):  
Yong Chuan Duan ◽  
Ying Ping Guan ◽  
Xing Dong Ma
Keyword(s):  
Finite Element ◽  
Tensile Test ◽  
Finite Element Model ◽  
Material Property ◽  
Statistical Error ◽  
Element Model ◽  
Ann Model ◽  
Process Data ◽  
Tailor Welded Blanks ◽  
Effective Material Property

A method based on artificial neural network (ANN) for predicting the effective material property is put forward in this paper. The finite element model of tensile test specimen is modeled in LS-DYNA code, which has transverse weld at the middle of the specimen and conforms to the ASTM specification. A statistical error analysis model is used to include the random phenomenon in the result of tensile test finite element model and verify the accuracy of finite element model (FEM) simulation. In order to study the effect of the processing parameter with design of experiment is followed, the simulation trail is conducted in all the levels of parameters. It is assumed that Hollomon’s law is followed by tailor welded blanks. The results obtained from fitting the post-process data of FEM by least square method are used to train and develop ANN model, the prediction average error of ANN model is acceptable compared with simulation trail.

scholarly journals Sensitivity Analysis of the Influence of Structural Parameters on Dynamic Behaviour of Highly Redundant Cable-Stayed Bridges

2013 ◽  
Vol 2013 ◽  
pp. 1-11 ◽  
Author(s):  
B. Asgari ◽  
S. A. Osman ◽  
A. Adnan
Keyword(s):  
Sensitivity Analysis ◽  
Finite Element ◽  
Finite Element Model ◽  
Model Updating ◽  
Structural Parameters ◽  
Element Model ◽  
Structural Behavior ◽  
Model Tuning ◽  
The Finite Element Model ◽  
Cable Stayed Bridges

The model tuning through sensitivity analysis is a prominent procedure to assess the structural behavior and dynamic characteristics of cable-stayed bridges. Most of the previous sensitivity-based model tuning methods are automatic iterative processes; however, the results of recent studies show that the most reasonable results are achievable by applying the manual methods to update the analytical model of cable-stayed bridges. This paper presents a model updating algorithm for highly redundant cable-stayed bridges that can be used as an iterative manual procedure. The updating parameters are selected through the sensitivity analysis which helps to better understand the structural behavior of the bridge. The finite element model of Tatara Bridge is considered for the numerical studies. The results of the simulations indicate the efficiency and applicability of the presented manual tuning method for updating the finite element model of cable-stayed bridges. The new aspects regarding effective material and structural parameters and model tuning procedure presented in this paper will be useful for analyzing and model updating of cable-stayed bridges.

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