The Response of a New Lightweight Rail Track System (LR55) to Various Loading Environment

1997 ◽  
Author(s):  
H. Al Nageim ◽  
F. Mohammad ◽  
Lewis Lesley
Keyword(s):  
Finite Element ◽  
Elastic Behaviour ◽  
Two Dimensional ◽  
Element Analysis ◽  
Finite Element Program ◽  
Vertical Pressure ◽  
Rail Track ◽  
Track System ◽  
Dimensional Finite Element ◽  
Element Program

The finite element method is used to determine the response of a new lightweight rail track system (LR55) to various loading environments. To calculate the vertical displacement of the rail track system and the vertical pressure in the sub-base and sub-grade layers due to wheel loads and loads exerted by transversely passing vehicles across the track, the global stiffness matrix of the structure is determined. This is done by using one and two dimensional finite element programs. In the two dimensional finite element analysis, linear isoparametric elements with 4-node quadrilateral and 3-node triangular shapes in the discretised mesh of the whole structure are used, also non-homogeneous materials with isotropic of linear elastic behaviour are assumed for all the components forming the track system and surrounding media. The results of the one dimensional finite element program are compared with those predicted from analytical approach in order to validate the finite element program developed. From the various examples presented the LR55 proves to withstand the main-line railway loading and the vertical pressure distribution in the sub-base and sub-grade of the pavement are within the allowable limit.

Finite Element Analysis of Synchronous Belt Tooth Failure

1993 ◽  
Vol 207 (2) ◽  
pp. 145-153 ◽  
Author(s):  
K W Dalgarno ◽  
A J Day ◽  
T H C Childs
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Material Model ◽  
Element Model ◽  
Element Analysis ◽  
Finite Element Program ◽  
Interface Elements ◽  
Dimensional Finite Element ◽  
Element Program ◽  
Critical Strains

This paper describes a finite element analysis of a synchronous belt tooth under operational loads and conditions with the objective of obtaining a greater understanding of belt failure by tooth root cracking through an examination of the strains within the facing fabric in the belt. The analysis used the ABAQUS finite element program, and was based on a two-dimensional finite element model incorporating a hyperelastic material model for the elastomer compound. Contact between the belt tooth face and the pulley groove was modelled using surface interface elements which allowed only compression and shear forces at the contact surfaces. It is concluded that the critical strains in the facing fabric of the belt, and therefore the belt life, are largely determined by the tangential loading condition on the belt teeth.

Dynamic Impact Simulation Study of Tubeless Pneumatic Tires

2016 ◽  
Author(s):  
Floyd Linayao ◽  
Raymond K. Yee
Keyword(s):  
Finite Element ◽  
Three Dimensional ◽  
Design Parameters ◽  
Inflation Pressure ◽  
Element Analysis ◽  
Finite Element Program ◽  
First Case ◽  
Dimensional Finite Element ◽  
Element Program ◽  
Three Dimensional Finite Element

Traditionally speaking, prototype tires are designed, and then tested on an experimental basis to evaluate performance. Using finite element analysis instead allows tire design parameters to be modified at will and underperforming architectures to be ruled out. This paper characterizes the dynamic response of a tubeless pneumatic vehicle tire as it is exposed to sudden impact and determines conditions under which failure would occur. Three cases were studied using a 175SR14 passenger tire, since passenger tires are most commonly used and impacts are more substantial on smaller tires. ABAQUS finite element program was used to perform nonlinear transient dynamic three-dimensional finite element analyses for three commonly tire encountered conditions. The first case, direct curb impact, determined that a safe inflation pressure range for tire velocities exists between 10 and 60 km per hour (kph). The second case, angled curb impact, found a smaller range of 10 to 40kph. The third case, impact with a pothole, found that at low inflation pressures, less stress is produced at higher velocities; increasing inflation pressure results in a transition point, causing larger stresses to be produced at higher velocities. From these analyses, several conclusions are drawn: inflation pressures below 100KPa do not produce a useful relationship between tire velocity and stress; thicker sidewalls help shield the tire from impact failure; and it is better for the tire to accelerate past a pothole in the 30 to 70kph range.

Three-dimensional finite element analysis for temperature filed of composite materials during the cure

2021 ◽  
Vol ahead-of-print (ahead-of-print) ◽  
Author(s):  
Zhangxin Guo ◽  
Zhiqiang Yu ◽  
Shiyi Wei ◽  
Guoliang Qi ◽  
Yongcun Li ◽  
...  
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Composite Structures ◽  
Three Dimensional ◽  
Arbitrary Geometry ◽  
Element Analysis ◽  
Finite Element Program ◽  
Content Type ◽  
Dimensional Finite Element ◽  
Element Program

PurposeThe cure simulation of composite structures with arbitrary geometry can be investigated by the finite element program.Design/methodology/approachFinite element method is employed in this work.FindingsThe simulated results match the experimental results well, which demonstrates the finite element analysis models are reliable. Compared with the one- and two-dimensional finite element analysis, temperature and degree of cure can be calculated at any point within composite structures in the present simulation analysis. The cure simulation of composite structures with arbitrary geometry can be investigated by the finite element program.Originality/valueA coupled thermokinetic simulation of the liquid composite molding process based on a three-dimensional finite element method is presented. The cure simulation of composite structures with arbitrary geometry can be investigated by the finite element program.

Finite Element Analysis on the Deformation of Energy-Saving Wire-Mesh Frame Wallboard

2014 ◽  
Vol 501-504 ◽  
pp. 731-735
Author(s):  
Li Zhang ◽  
Kang Li
Keyword(s):  
Finite Element ◽  
Energy Saving ◽  
Theoretical Basis ◽  
Steel Wire ◽  
Wire Mesh ◽  
Design Parameters ◽  
Element Analysis ◽  
Finite Element Program ◽  
Element Program ◽  
Influence Degree

This paper analyzes the influence degree of related design parameters of wire-mesh frame wallboard on deformation through finite element program, providing theoretical basis for the design and test of steel wire rack energy-saving wallboard.

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