scholarly journals Experimental Test of Circular Hollow Sections Solid Flanged Splice

2020 ◽  
Vol 8 (6) ◽  
pp. 3847-3851
Keyword(s):  
Finite Element ◽  
Bending Moment ◽  
Finite Element Models ◽  
Moment Capacity ◽  
Flexural Members ◽  
End Plate ◽  
Modes Of Failure ◽  
Aesthetic Appearance ◽  
Bolt Failure ◽  
Ultimate Moment

The use of circular hollow sections (CHS) have increased due to its aesthetic appearance and good mechanical properties. This research investigates the behavior of the bolted CHS splices with circular end plates under pure bending moment that allows the use of CHS as long flexural members. Three connections are tested and the corresponding finite element models are constructed. The finite element models are verified with the experimental results and showed acceptable agreement in terms of both ultimate moment capacity and load-displacement curves. Three modes of failure are observed where the first is pure bolt failure, the second is pure end plate yielding while the third is a combination of the two modes where end plate plastifies accompanied by bolt failure. Stiffness is also observed and is found to be greatly affected by the thickness of the end plate

scholarly journals Comparisons of finite element models used to predict bending strength of mortise-and-tenon joints

BioResources ◽  
2020 ◽  
Vol 15 (3) ◽  
pp. 5801-5811
Author(s):  
Wengang Hu ◽  
Na Liu
Keyword(s):  
Finite Element ◽  
Bending Strength ◽  
Bending Moment ◽  
Element Model ◽  
Finite Element Models ◽  
The Finite Element Method ◽  
T Joints ◽  
Moment Capacity ◽  
Rigid Model ◽  
Mortise And Tenon

This study aimed to obtain a better method for establishing a finite element model of mortise-and-tenon (M-T) joints. Three types of M-T joint finite element models, which included a whole rigid model, a tie rigid model, and a semi-rigid model, were established and compared with experimental results by predicting the bending moment capacity (BMC) of M-T joints based on the finite element method (FEM). The results showed that the semi-rigid model performed much better than the tie rigid model, followed by the whole rigid model. For the semi-rigid model, the ratios of FEM ranged from 0.85 to 1.09. For the whole rigid model and tie rigid model, the BMC of the M-T joint was overestimated. In addition, the results showed that tenon size remarkably affected the BMC and stiffness of the M-T joint, and tenon width had a greater effect on the BMC of the M-T joint than the tenon length.

Multi-Tower Effect Analysis of Long-Span Suspension Bridge

2010 ◽  
Vol 163-167 ◽  
pp. 1940-1944
Author(s):  
Xiao Yan Zheng ◽  
Zhuo De Feng ◽  
Yue Xu
Keyword(s):  
Finite Element ◽  
Natural Frequency ◽  
Bending Moment ◽  
Suspension Bridge ◽  
Finite Element Models ◽  
Performance Difference ◽  
Displacement Effect ◽  
Effect Analysis ◽  
Long Span ◽  
Behavior Study

As a new bridge system, mechanics behavior study on long-span multi-tower suspension is also very deficiency. The existence of center towers is the origin of performance difference between multi-tower suspension bridge and the traditional one. Based on the Midas/Civil platform, the paper takes a three tower suspension bridge as project reference, establishes finite element models of suspension bridge, which the main span is longer than one kilometer and towers from two to seven. Moreover, the structural property is analyzed separately, which bending moment and displacement effect of girder and tower along with the tower number changes is considered. Natural frequency differences of the model bridges are also paid attention on.

scholarly journals Bending Moment Capacity of Stainless Steel-Concrete Composite Beams

2018 ◽  
Author(s):  
Katherine Ann Cashell ◽  
Rabee Shamass
Keyword(s):  
Stainless Steel ◽  
Analytical Solution ◽  
Strain Hardening ◽  
Bending Moment ◽  
Composite Beams ◽  
Design Tool ◽  
Ductile Material ◽  
Moment Capacity ◽  
Aesthetic Appearance ◽  
Current Design

Stainless steel is increasingly popular in construction owing to its corrosion resistance, excellent mechanical and physical properties as well as its aesthetic appearance. The current paper is concerned with the use of stainless steel in steel-concrete composite beams, which is a new application.  Current design codes for steel-concrete composite beams neglect strain hardening in the steel. Whilst this is a reasonable assumption for carbon steel, stainless steel is a very ductile material which offers significant levels of strain hardening prior to failure.  Therefore, when current design provisions are applied to stainless steel composite beams, the strength predictions are generally inaccurate. The current study presents a simplified analytical solution that takes into consideration the strain hardening of stainless steel when bending moment capacity is calculated. A finite element model is developed and validated against a number of experimental results for composite beams.  The validated numerical model is then used to investigate the accuracy of the proposed analytical solution. It is concluded that simplified analytical solution is reliable and provides a straightforward design tool for practicing engineers who wish to specify this novel construction form in appropriate applications. 

Analytical Study of Appropriate Design for High-Grade Induction Bend Pipes Subjected to Large Ground Deformation

2004 ◽  
Vol 126 (4) ◽  
pp. 376-383 ◽  
Author(s):  
Hiroshi Yatabe ◽  
Naoki Fukuda ◽  
Tomoki Masuda ◽  
Masao Toyoda
Keyword(s):  
Mechanical Properties ◽  
Finite Element ◽  
Analytical Study ◽  
Ground Deformation ◽  
Bending Moment ◽  
Finite Element Models ◽  
High Grade ◽  
Buried Pipeline ◽  
Parametric Studies

In order to clarify the significant parameters to control the deformability of high-grade induction bend pipes, finite element analyses simulating the deformation behavior subjected to an internal pressure and bending moment were carried out. Parametric studies were conducted using the finite element models with various mechanical properties and geometric imperfections. The change in the integrity of the buried pipeline due to the quality of the induction bend pipe was then quantitatively examined. Consequently, this study indicated that the mechanical properties, the dimensions and tolerance and the properties of the “transition” part should be appropriately designed in proportion to the ground deformation.

Study on Numerical Methodologies for Assessing Ultimate Bending Moment of Ship Hull Girder

2016 ◽  
Author(s):  
Ming Cai Xu ◽  
Zhao Jun Song
Keyword(s):  
Finite Element ◽  
Dynamic Analysis ◽  
Ultimate Strength ◽  
Bending Moment ◽  
Finite Element Models ◽  
Element Analysis ◽  
Hull Girder ◽  
Computer Resource ◽  
Explicit Dynamic ◽  
Convergence Of Solution

Nonlinear finite element analysis is usually used to assess the ultimate strength of hull girder, which includes implicit analysis and explicit dynamic analysis. So far, most of researchers use the implicit analysis to assess the ultimate strength of various vessels or stiffened plates. Comparing with the implicit analysis, the explicit dynamic analysis may be more stable since this method doesn’t need to consider the convergence of solution, and can consider the transient influence of time. However, the accuracy of solution results and time in the explicit dynamic method is very important. This depends on modelling configurations, such as the loading time, geometric ranges of finite element models, element types and applying methods of loading. The purpose of the present paper is to investigate the influences of these factors, and then to figure out a reliable numerical method which meets permitted accuracy and consumes acceptable computer resource in explicit dynamic analysis.

Parametric Study of Compound Cold-Formed Steel Sections as Flexural Members

2015 ◽  
Vol 74 (4) ◽  
Author(s):  
Ker Shin Mu ◽  
Poi Ngian Shek ◽  
Arizu Sulaiman ◽  
Boon Cheik Tan
Keyword(s):  
Parametric Study ◽  
Local Buckling ◽  
Bending Moment ◽  
Steel Plates ◽  
Pure Bending ◽  
Moment Capacity ◽  
Flexural Members ◽  
Bending Capacity ◽  
Steel Sections ◽  
Cold Formed Steel

This paper presents a parametric study on compound cold-formed steel sections as flexural members. The compound members are used to sustain higher load and solve the problems of local buckling and lateral torsional buckling. The aim of this study is to investigate the strength of compound cold-formed steel section subjected to pure bending. Moment capacity of the compound section is calculated in accordance to Eurocode 3. The compound cold-formed steel sections proposed in this study are made up of two cold-formed steel C-section and hot-rolled plates. Steel plates with thickness of 3 mm to 8 mm are added to the cold-formed double C-section with the purpose to increase the bending capacity. From the comparison, moment capacity of compound sections give higher value as compared to cold-formed steel C-section with the comparison ratios range between 1.15 and 3.30. Results from the study show that compound cold-formed steel sections able to enhance the strength in resisting pure bending by adding steel plate at the flanges and web of the section. On the other hand, finite element modeling using ANSYS is carried out on two of the selected compound cold-formed steel sections and the results show good agreement with analytical results.

scholarly journals Behavior of Circular Hollow Sections Solid Flanged Splice

2020 ◽  
Vol 8 (6) ◽  
pp. 4434-4438
Keyword(s):  
Finite Element ◽  
Element Model ◽  
Hollow Section ◽  
End Plate ◽  
Flexural Member ◽  
Ultimate Moment ◽  
Circular Hollow Section ◽  
Different Diameters ◽  
The Finite Element Model ◽  
Good Agreement

As the use of circular hollow section (CHS) is growing due to its aesthetic shape, attention should be given to its connections. Splicing the CHS is essential for its use as long flexural member. This research investigates the behavior of flanged CHS splice under pure bending. A finite element study is conducted to investigate the behavior of flanged splice with eight bolts arrangement and three different diameters. The finite element model is verified against experimental results. It showed good agreement in terms of both ultimate moment and flexural stiffness. Three different modes of failures are observed and investigated. Generally, mode of failure depends on the thickness of the end plate. Results of different end plate thicknesses is presented and the transition thickness between different modes is determined.

Mitigation of distortion in large additive manufacturing parts

2015 ◽  
Vol 231 (6) ◽  
pp. 983-993 ◽  
Author(s):  
Erik R Denlinger ◽  
Pan Michaleris
Keyword(s):  
Finite Element ◽  
Additive Manufacturing ◽  
Computation Time ◽  
Bending Moment ◽  
Element Model ◽  
Mitigation Strategies ◽  
Manufacturing Processes ◽  
Finite Element Models ◽  
Longitudinal Bending ◽  
Reduce Computation Time

Distortion mitigation techniques for large parts constructed by additive manufacturing processes are investigated. Unwanted distortion accumulated during deposition is a common problem encountered in additive manufacturing processes. The proposed strategies include depositing equal material on each side of a substrate to balance the bending moment about the neutral axis of the workpiece and applying heat to straighten the substrate. Simple finite element models are used to predict the effectiveness of the mitigation strategies in order to reduce computation time and to avoid costly experiments. The strategy of adding sacrificial material is shown to be most effective and is then applied to the manufacture of a large electron beam deposited part consisting of several thousand deposition passes. The deposition strategy is shown to reduce the maximum longitudinal bending distortion in the large additive manufacturing part by 91%. It is shown that after the distortion mode of concern is identified, simple finite element models can be used to study distortion accumulation trends relevant to the large part. Experimental observations made here, as well as finite element model results, suggest that the order in which the balancing material is added significantly affects the success of the proposed distortion mitigation strategy.

scholarly journals Non-Linear Analysis of Plated T-Subjected to Negative Bending Moment

2013 ◽  
Vol 6 (1) ◽  
pp. 90-104
Author(s):  
Ahmed Abdullah Mansor
Keyword(s):  
Finite Element ◽  
Constitutive Models ◽  
Bending Moment ◽  
Plain Concrete ◽  
Steel Plates ◽  
Finite Element Models ◽  
Finite Element Program ◽  
Linear Behavior ◽  
Element Program ◽  
Negative Bending

This paper present a numerical analysis using ANSYS finite element program to simulate the reinforced concrete T- beams strengthened with external bonded steel plates when subjected to negative bending. Eight beams with length 2.0m and simply supported were modeled. Nonlinear materials behavior, as it relates to steel reinforcing bars and plain concrete, and linear behavior for plate is simulated using appropriate constitutive models. The results showed that the general behavior of the finite element models represented by the load-deflection curves at midspanappear well agreement with the test data from the previous researches. Also the crack patterns at the final loads from the finite models are discussed . The finite element models represented by this search can be used to carry out parametric study for the strengthening of plated T-beams.

GRE Pipeline Installation Procedures: A Field Case Study

2009 ◽  
Author(s):  
A. Khalaf ◽  
Y. Al-Tartoor ◽  
A. C. Seibi ◽  
A. Karrech
Keyword(s):  
Finite Element ◽  
Structural Integrity ◽  
Normal Force ◽  
Bending Moment ◽  
Finite Element Models ◽  
Pipe Failure ◽  
Pipe Length ◽  
Unskilled Workers ◽  
Pipe Deflection

Field layout Glass Reinforced Epoxy (GRE) pipeline is generally handled by unskilled workers with limited or no background of the mechanics of pipes subjected to large deformation. This paper, therefore, presents working envelops for field operators to avoid any potential GRE pipe failure during installation through finite element modeling using ANSYS. The finite element models consist of various pipe sizes subjected to typical loading conditions similar to field pipeline layout. The models were used to estimate the pipe deflection and the induced stresses. The analysis was based on the assumption that the pipeline acts as a cantilever beam. The internal normal force, shear force, and bending moment were obtained for each section along the pipe length under study. The maximum normal stress was calculated and compared to the failure strength of GRE for various lifting scenarios. A sensitivity analysis on the various parameters affecting the structural integrity of the pipeline was also performed. It was found that the threshold lifting height causing potential pipe failure is 2 m for all pipe sizes. Moreover, the results showed that the minimum threshold height increases for smaller pipe sizes.

Sign in / Sign up

Export Citation Format

Share Document