Study on Mechanical Behavior of Floor Beams in the High-Strength Cold-Formed Steel Framing System

2011 ◽  
Vol 71-78 ◽  
pp. 3489-3494
Author(s):  
Yao Jie Guo ◽  
De Wei Zeng ◽  
Yan Zhou Chen
Keyword(s):  
Finite Element ◽  
Mechanical Behavior ◽  
Shell Element ◽  
High Strength ◽  
Plastic Shell ◽  
Loading Test ◽  
System A ◽  
Steel Framing ◽  
Practical Engineering ◽  
Cold Formed Steel

Tests and the finite element method (FEM) have been used to research the mechanical behavior of floor beams in the new cold-formed steel framing system. A group of 3 floor beams have been carried loading test to obtain ultimate bearing capacity, then finite element models, using plastic shell element and simultaneous considering material and geometric nonlinearity in ANSYS, have been established to analyze the mechanical behavior of floor beams. Finally, the ultimate uniform loads are given for the various specifications of floor beams, for practical engineering design.

The Finite Element Analysis of Effect Factor about the Shear Behavior of Cold-Formed Steel Composite Wall

2011 ◽  
Vol 295-297 ◽  
pp. 415-418
Author(s):  
Chao Xu ◽  
Yu Hua An ◽  
Ai Hua Bai
Keyword(s):  
Finite Element ◽  
Shell Element ◽  
Shear Behavior ◽  
Plastic Shell ◽  
Element Analysis ◽  
Effect Factor ◽  
Steel Composite ◽  
Cold Formed Steel ◽  
Composite Wall ◽  
Composite Walls

This paper adopts the finite element method to study the shear resistance of the first floor cold-formed steel composite walls in six stories residential structures, plastic shell element is used, materials nonlinearity and geometric large deformation are considered. The screws connecting sheathing and frame are modeled through coupling methods. Analyzing the influence of factors such as stud spacing，Brace and rigid bracing's establishment，component wall thickness to the shear behavior of cold-formed steel composite wall， these dates can provide certain theory for the actual project.

Contrastive Study on Finite Element Models of High-Strength Pipelines Crossing Active Faults

2016 ◽  
Vol 850 ◽  
pp. 957-964
Author(s):  
Wei Zheng ◽  
Hong Zhang ◽  
Xiao Ben Liu ◽  
Le Cai Liang ◽  
Yin Shan Han
Keyword(s):  
Finite Element ◽  
Design Method ◽  
Active Faults ◽  
Shell Element ◽  
High Strength ◽  
Element Model ◽  
Beam Element ◽  
Finite Element Models ◽  
Fixed Boundary ◽  
Equivalent Boundary

There is a potential for major damage to the pipelines crossing faults, therefore the strain-based design method is essential for the design of buried pipelines. Finite element models based on soil springs which are able to accurately predict pipelines’ responses to such faulting are recommended by some international guidelines. In this paper, a comparative analysis was carried out among four widely used models (beam element model; shell element model with fixed boundary; shell element model with beam coupled; shell element model with equivalent boundary) in two aspects: differences of results and the efficiency of calculation. The results show that the maximum and minimum strains of models coincided with each other under allowable strain and the calculation efficiency of beam element model was the highest. Besides, the shell element model with beam coupled or equivalent boundary provided the reasonable results and the calculation efficiency of them were higher than the one with fixed boundary. In addition, shell element model with beam coupled had a broader applicability.

Finite Element Analysis of the Influence of Weld Size on the Combined Connection with Bolts and Welds

2014 ◽  
Vol 578-579 ◽  
pp. 1276-1280
Author(s):  
Jian Suo Ma ◽  
Run Shan Bai ◽  
Min Feng Li ◽  
Yuan Qing Wang ◽  
Lei Wang ◽  
...  
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Weld Joint ◽  
High Strength ◽  
Element Analysis ◽  
Joint Performance ◽  
Practical Engineering ◽  
Bolt Connection

The combined connection with welds and bolds mainly refers to Interaction of weld and high-strength bolts. Both bolts and welds show influence on the performance of the combined connection. In practical engineering, because of limited joint size, only welds’ performence can increase bolts number or load. Therefore, it need to explore the influences of weld on joint performance. Moreover, for given determined bolt connection, it is necessary to discuss the influences of weld size, weld length and weld height, on the performance of a certain weld joint.

scholarly journals Finite Element Modelling of Laser Stitch Welding Joints for Structural Dynamic Predictions

2019 ◽  
Vol 16 (2) ◽  
pp. 6556-6567
Author(s):  
M. A. S. Aziz Shah ◽  
M. A. Yunus ◽  
M. N. Abdul Rani ◽  
M. S. Mohd Zin ◽  
W. I. I. Wan Iskandar Mirza
Keyword(s):  
Residual Stress ◽  
Finite Element ◽  
Dynamic Behaviour ◽  
Welding Process ◽  
Shell Element ◽  
High Strength ◽  
Mode Shapes ◽  
Finite Element Models ◽  
Structural Dynamic ◽  
Welded Structure

Laser stitch welding is a joining technique that has been increasingly popular in automotive industries, such as in the manufacturing and assembling of the car’s body-in-white (BiW) due to its advantages over the resistance spot weld, such as low heat application and high strength weld. The dynamic behaviour of a laser stitch welded structure is relatively difficult to predict accurately due to local parameters being induced during the laser welding process, such as heat affected zone (HAZ) and residual stress in the welded structure. This paper presents the idea of modelling the laser stitch weld by investigating different types of element connectors that can be used to represent laser stitch weld, such as rigid body element (RBE2), shell element (CQUAD4), bar element (CBAR) and area contact model (ACM2) format of element connectors. The accuracy of finite element models of laser stitch welded joints is compared in terms of natural frequencies and mode shapes with the experiment counterparts. The dynamic behaviour of the measured structure is obtained by using an impact hammer with free-free boundary conditions. It is found that the accuracy of the finite element models of the laser stitch welded structure highly depends on the involvement of residual stress and the heat affected zones that are generated from the welding process.

A novel parallel finite element procedure for nonlinear dynamic problems using GPU and mixed-precision algorithm

2020 ◽  
Vol 37 (6) ◽  
pp. 2193-2211 ◽  
Author(s):  
Shengquan Wang ◽  
Chao Wang ◽  
Yong Cai ◽  
Guangyao Li
Keyword(s):  
Finite Element ◽  
Parallel Computing ◽  
Nonlinear Dynamic ◽  
Shell Element ◽  
Double Precision ◽  
Dynamic Problems ◽  
Content Type ◽  
Computational Speed ◽  
Mixed Precision ◽  
Practical Engineering

Purpose The purpose of this paper is to improve the computational speed of solving nonlinear dynamics by using parallel methods and mixed-precision algorithm on graphic processing units (GPUs). The computational efficiency of traditional central processing units (CPUs)-based computer aided engineering software has been difficult to satisfy the needs of scientific research and practical engineering, especially for nonlinear dynamic problems. Besides, when calculations are performed on GPUs, double-precision operations are slower than single-precision operations. So this paper implemented mixed precision for nonlinear dynamic problem simulation using Belytschko-Tsay (BT) shell element on GPU. Design/methodology/approach To minimize data transfer between heterogeneous architectures, the parallel computation of the fully explicit finite element (FE) calculation is realized using a vectorized thread-level parallelism algorithm. An asynchronous data transmission strategy and a novel dependency relationship link-based method, for efficiently solving parallel explicit shell element equations, are used to improve the GPU utilization ratio. Finally, this paper implements mixed precision for nonlinear dynamic problems simulation using the BT shell element on a GPU and compare it to the CPU-based serially executed program and a GPU-based double-precision parallel computing program. Findings For a car body model containing approximately 5.3 million degrees of freedom, the computational speed is improved 25 times over CPU sequential computation, and approximately 10% over double-precision parallel computing method. The accuracy error of the mixed-precision computation is small and can satisfy the requirements of practical engineering problems. Originality/value This paper realized a novel FE parallel computing procedure for nonlinear dynamic problems using mixed-precision algorithm on CPU-GPU platform. Compared with the CPU serial program, the program implemented in this article obtains a 25 times acceleration ratio when calculating the model of 883,168 elements, which greatly improves the calculation speed for solving nonlinear dynamic problems.

Mechanical Behavior of One Internal Fixator (O???nil Plate and Screws System): A Finite Element Study and Clinical Experiences

2007 ◽  
Vol 22 (3) ◽  
pp. 173-180 ◽  
Author(s):  
Roberto Valentini ◽  
Bruno Martinelli ◽  
Francesca Cosmi ◽  
Marco Hoglievina ◽  
Paolo Nogherotto
Keyword(s):  
Finite Element ◽  
Mechanical Behavior ◽  
Internal Fixator ◽  
Clinical Experiences ◽  
Finite Element Study ◽  
System A ◽  
Element Study

Cold-Formed Thin-Walled Steel Framing Residential System

2014 ◽  
Vol 620 ◽  
pp. 183-186
Author(s):  
Yu Hua Zhang
Keyword(s):  
Mechanical Behavior ◽  
Behavior Analysis ◽  
Steel Structure ◽  
Horizontal Load ◽  
Vertical Load ◽  
Paper Briefly ◽  
Steel Framing ◽  
Cold Formed Steel ◽  
Thin Walled

This paper briefly introduces the cold-formed thin-walled steel residential system, the mechanical behavior analysis on stress of cold-formed thin-walled steel structure residential vertical load and horizontal load, and through compared with cold-formed thin-walled steel structure residential and traditional residential structure, summarized the characteristics of cold-formed steel residential. It is significant that the cold-formed steel residential system will be promoted and applied.

Influence of Angle Thickness towards Stiffness and Strength Prediction for Cold-Formed Steel Top-Seat Flange Cleat Connection

2013 ◽  
Vol 479-480 ◽  
pp. 1144-1148 ◽  
Author(s):  
Yeong Huei Lee ◽  
Cher Siang Tan ◽  
M.Md. Tahir ◽  
Shahrin Mohammad ◽  
Poi Ngian Shek ◽  
...  
Keyword(s):  
Finite Element ◽  
Finite Element Modelling ◽  
Structural Integrity ◽  
Structural Performance ◽  
Design Stage ◽  
Strength Prediction ◽  
Finite Element Models ◽  
Steel Framing ◽  
Cold Formed Steel ◽  
Thin Walled

For the connection stiffness and strength prediction, Eurocode has showed an inadequacy as it will be affected by the thin-walled behaviour of cold-formed steel in actual structural performance. This paper performs a study on the connection stiffness prediction for cold-formed steel top-seat flange cleat connection with various angle thickness. Validated finite element modelling technique is applied for further advanced investigation. From the developed finite element models, it was realized that Eurocode has overestimated by the analytical stiffness prediction using component method for the studied connection which reduces the structural integrity in the design stage. A new proposal on connection stiffness prediction with influence of angle thickness for cold-formed steel top-seat flange cleat connection is presented to assist practicing engineers to design the cold-formed connection in light steel framing.

Experiments and finite element modelling of screw pattern of self-drilling screw connections for high strength cold-formed steel

2019 ◽  
Vol 145 ◽  
pp. 106393 ◽  
Author(s):  
Krishanu Roy ◽  
Hieng Ho Lau ◽  
Tina Chui Huon Ting ◽  
Rehan Masood ◽  
Ankur Kumar ◽  
...  
Keyword(s):  
Finite Element ◽  
Finite Element Modelling ◽  
High Strength ◽  
Element Modelling ◽  
Cold Formed Steel
Sign in / Sign up

Export Citation Format

Share Document