Evaluation of structural-concrete design-concepts based on finite-element analysis

1998 ◽  
Vol 21 (4-5) ◽  
pp. 330-338 ◽  
Author(s):  
M. D. Kotsovos ◽  
K. V. Spiliopoulos
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Structural Concrete ◽  
Element Analysis ◽  
Design Concepts

scholarly journals Finite Element Analysis and Full-Scale Testing of Locomotive Crashworthy Components

2013 ◽  
Author(s):  
Patricia Llana ◽  
Richard Stringfellow ◽  
Ronald Mayville
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
New Technologies ◽  
Element Model ◽  
Full Scale ◽  
Element Analysis ◽  
Design Concepts ◽  
Dynamic Finite Element Analysis ◽  
Full Scale Tests ◽  
Force Displacement

The Office of Research and Development of the Federal Railroad Administration (FRA) and the Volpe Center are continuing to evaluate new technologies for increasing the safety of passengers and operators in rail equipment. In recognition of the importance of override prevention in train-to-train collisions in which one of the vehicles is a locomotive, and in light of the success of crash energy management technologies in cab car-led passenger trains, the Volpe Center seeks to evaluate the effectiveness of components that could be integrated into the end structure of a locomotive that are specifically designed to mitigate the effects of a collision and, in particular, to prevent override of one of the lead vehicles onto the other. A research program has been conducted to develop, fabricate and test two crashworthy components for the forward end of a locomotive: (1) a deformable anti-climber, and (2) a push-back coupler. Detailed designs for these components were developed, and the performance of each design was evaluated through large deformation dynamic finite element analysis (FEA). Designs for two test articles that could be used to verify the performance of the component designs in full-scale tests were also developed. The two test articles were fabricated and dynamically tested by means of rail car impact in order to verify certain performance characteristics of the two components relative to specific requirements. The tests were successful in demonstrating the effectiveness of the two design concepts. Test results were consistent with finite element model predictions in terms of energy absorption capability, force-displacement behavior and modes of deformation.

scholarly journals Design Concepts of Polycarbonate-Based Intervertebral Lumbar Cages: Finite Element Analysis and Compression Testing

2016 ◽  
Vol 2016 ◽  
pp. 1-9 ◽  
Author(s):  
J. Obedt Figueroa-Cavazos ◽  
Eduardo Flores-Villalba ◽  
José A. Diaz-Elizondo ◽  
Oscar Martínez-Romero ◽  
Ciro A. Rodríguez ◽  
...  
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Compression Testing ◽  
Patient Specific ◽  
Compressive Yield Strength ◽  
Element Analysis ◽  
Testing Conditions ◽  
Design Concepts ◽  
3D Printed ◽  
Manufacturing Parameters

This work explores the viability of 3D printed intervertebral lumbar cages based on biocompatible polycarbonate (PC-ISO® material). Several design concepts are proposed for the generation of patient-specific intervertebral lumbar cages. The 3D printed material achieved compressive yield strength of 55 MPa under a specific combination of manufacturing parameters. The literature recommends a reference load of 4,000 N for design of intervertebral lumbar cages. Under compression testing conditions, the proposed design concepts withstand between 7,500 and 10,000 N of load before showing yielding. Although some stress concentration regions were found during analysis, the overall viability of the proposed design concepts was validated.

scholarly journals DESIGN AND FINITE ELEMENT ANALYSIS OF FRP LPG CYLINDER

2012 ◽  
pp. 44-47
Author(s):  
MOYAHABO BRADLEY MOKETLA ◽  
MUKUL SHUKLA
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Composite Layer ◽  
Element Analysis ◽  
Strong Light ◽  
Design Concepts ◽  
Viability Analysis ◽  
Plastic Composite ◽  
Frp Composite ◽  
African Context

This paper entails the design and finite element analysis (FEA) of a LPG cylinder made of E-glass fiber, vinylester resin and HDPE plastic composite The liner of the cylinder is made of HDPE plastic (blow moulding grade) and wound with continuous fiber E-glass composite with vinyl-ester polymer matrix. The cylinder cover is also made of HDPE plastic. The LPG cylinder was designed and tested for burst pressure of 3 MPa. The thickness of the cylinder was established to be 3.5 mm (1.5 mm of liner and 2 mm of FRP composite layer) using Abaqus software based FEA. Various design concepts were worked out alongwith a financial viability analysis. A strong, light, rust proof and semi-transparent LPG cylinder was aimed to be designed in this paper focusing on the use in the South African context.

scholarly journals Finite Element Analysis of Structural Concrete Insulated Panels Subjected to Dynamic Loadings

2020 ◽  
Vol 1 (2) ◽  
pp. 31-37
Author(s):  
Anwar Khitab
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Low Cost ◽  
Three Dimensional ◽  
Insulation Material ◽  
Structural Concrete ◽  
Dead Weight ◽  
Element Analysis ◽  
Building Systems ◽  
Three Dimensional Finite Element

Human population is growing around the world day by day, necessitating highly sustainable and energy efficient building systems. In conventional building systems, significant amount of energy is consumed for providing thermal comfort to the occupants. Materials used for thermal insulation not only increase the cost of the buildings but also increase the dead weight. Structural concrete insulated panel system (SCIP) provide thermally efficient, light weight, and low-cost solution as compared to the conventional systems. SCIP system is new innovation in which, insulation material is placed between two layers of concrete. Due to low weight, it can be easily handled and transported to project sites. In present research, the performance of SCIP walls in a typical school double story building is examined by three-dimensional finite element analysis, using SAP2000. The response is evaluated by varying the thickness of the insulation layer in terms of safety and serviceability. The results show that the buildings incorporating SCIPs are capable to withstand high dynamic and earthquake loads and are significantly economical as compared to the conventional building systems.

Using the Parts Used to Be Removed to Improve Compliant Joint’s Performance

2018 ◽  
Author(s):  
Zhongtian Xie ◽  
Lifang Qiu ◽  
Debin Yang
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Compliant Mechanisms ◽  
Great Influence ◽  
3D Models ◽  
Element Analysis ◽  
Design Concepts ◽  
Compliant Joints ◽  
Tension And Compression ◽  
Design And Manufacture

Compliant mechanisms gain their mobility from the deflection of flexible members. Compliant joints are the basis of compliant mechanisms, their performance has great influence on compliant mechanisms’ characteristics. This paper presents the concept that the parts used to be removed during design and manufacture processes can be retained and redesigned to improve compliant joints’ performance. They are designed specially to help to improve the joints’ ability to resist tension and compression. Some examples are proposed and discussed. 3D models are created and analyzed using finite element analysis (FEA) to verify the design concepts. A benchmark Lamina Emergent Torsional (LET) joint is also analyzed through FEA. The results obtained from FEA confirm the design concepts presented in this paper very well. Some other applications are also proposed and discussed.

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