The Utilization of Glass as a Cost-Effective, Compressive Compositing Material in Structural Applications; Finite Element Modeling and Physical Testing

2021 ◽  
Author(s):  
John Cotter ◽  
Rasim Guldiken
Keyword(s):  
Finite Element ◽  
Finite Element Modeling ◽  
Cost Effective ◽  
Element Modeling ◽  
Structural Applications ◽  
Physical Testing

scholarly journals 3D Finite Element Modeling of Single Bolt Connections under Static and Dynamic Tension Loading

2015 ◽  
Vol 2015 ◽  
pp. 1-12 ◽  
Author(s):  
Emily Guzas ◽  
Kevin Behan ◽  
John Davis
Keyword(s):  
Finite Element ◽  
Finite Element Modeling ◽  
Test Cases ◽  
Computationally Efficient ◽  
Loading Test ◽  
Dynamic Tension ◽  
Bolted Connection ◽  
Element Modeling ◽  
Physical Testing ◽  
Tension Loading

The Naval Undersea Warfare Center has funded research to examine a range of finite element approaches used for modeling bolted connections subjected to various loading conditions. Research focused on developing finite element bolt representations that were accurate and computationally efficient. A variety of finite element modeling approaches, from detailed models to simplified ones, were used to represent the behavior of single solid bolts under static and dynamic tension loading. Test cases utilized models of bolted connection test arrangements (static tension and dynamic tension) developed for previous research and validated against test data for hollow bore bolts (Behan et al., 2013). Simulation results for solid bolts are validated against experimental data from physical testing of bolts in these load configurations.

scholarly journals Cost-Effective Bulk Glass Reinforced Composite Columns

2020 ◽  
Vol 4 (2) ◽  
pp. 47
Author(s):  
John Cotter ◽  
Rasim Guldiken
Keyword(s):  
Finite Element ◽  
Finite Element Modeling ◽  
Low Cost ◽  
Soda Lime ◽  
Soda Lime Glass ◽  
Shear Stresses ◽  
Bulk Glass ◽  
Element Modeling ◽  
Reinforced Composite ◽  
Structural Applications

The cost of construction has been increasing, stemming mostly from increased material costs. One potential method to address this issue is the introduction of novel composites for use in structural applications. Bulk glass may prove to be a superior compositing material due to its low cost and high strength. The introduction of bulk soda-lime glass to structural applications is nontrivial; due to glass’ unique properties, such as its relatively low Young’s modulus (when compared to steel) and brittleness, compositing glass has proven difficult. A novel concept of a glass-reinforced composite column (GRCC) is introduced that works to benefit from glass’ unique properties for structural applications. The results indicate that GRCCs can be designed that have costs that are estimated to be 11% less than typical timber construction members. Additionally, GRCCs are estimated to provide a 50% cost advantage over similarly strong structural steel sections. By interpreting the results of finite element modeling, which was conducted iteratively to form buckling load to cost curves, three regions were identified that occur as the glass percentage is increased. These regions also exist with columns made of other materials (such as steel). Additionally, the finite element modeling (FEM)-determined shear stresses have smaller values than the shear strengths of typical sizing agents. In conclusion, GRCCs provide significant cost advantages (up to 50% cost reduction) over steel, and slight cost advantages when compared to structural timbers, although GRCCs have the added benefit of consisting of non-degrading materials.

Effect of Site Conditions on the Design of Removable Anti-Ram Bollards

2008 ◽  
Vol 400-402 ◽  
pp. 801-805
Author(s):  
Chun Lin Liu ◽  
Siew Kheong Phang ◽  
Jian Yun Sun
Keyword(s):  
Finite Element ◽  
Finite Element Modeling ◽  
Site Condition ◽  
Test Environment ◽  
Physical Test ◽  
Department Of State ◽  
Element Modeling ◽  
Performance Requirements ◽  
The Us ◽  
Physical Testing

Removable Anti-ram bollards used in perimeter protection are tested to meet performance requirements of established standards such as the US Department of State specification SD-STD-02.01. Under these standards, tests are conducted in prescribed conditions that should be representative of the service installation. In actual project, conditions encountered on site may vary from the test environment and it would be expensive and time consuming to validate each deviation with a physical test. High-fidelity physics-based (HFPB) finite element modeling can provide precise simulations of the behavior of anti-ram bollards. This paper presents the use of HFPB finite element modeling, using LS-DYNA, in an actual project to evaluate the performance of an anti-ram bollard design according to the actual site condition that is different with the test requirement. The study suggests that removable anti-ram bollards must be designed and engineered to actual conditions that are found on site. It also shows that HFPB modeling can be an effective tool that supplements physical testing of anti-ram bollards.

Exact First Order Finite Element Modeling for Eddy Current NDE

1991 ◽  
Vol 3 (1) ◽  
pp. 235-253 ◽  
Author(s):  
L. D. Philipp ◽  
Q. H. Nguyen ◽  
D. D. Derkacht ◽  
D. J. Lynch ◽  
A. Mahmood
Keyword(s):  
Finite Element ◽  
Finite Element Modeling ◽  
Eddy Current ◽  
Element Modeling ◽  
First Order ◽  
Eddy Current Nde

Tire Vibration Modes and Effects on Vehicle Ride Quality

1993 ◽  
Vol 21 (1) ◽  
pp. 23-39 ◽  
Author(s):  
R. W. Scavuzzo ◽  
T. R. Richards ◽  
L. T. Charek
Keyword(s):  
Finite Element ◽  
Finite Element Modeling ◽  
Operating Conditions ◽  
Modal Testing ◽  
Ride Quality ◽  
Vibration Modes ◽  
Inflation Pressure ◽  
Passenger Cars ◽  
Element Modeling ◽  
Road Surfaces

Abstract Tire vibration modes are known to play a key role in vehicle ride, for applications ranging from passenger cars to earthmover equipment. Inputs to the tire such as discrete impacts (harshness), rough road surfaces, tire nonuniformities, and tread patterns can potentially excite tire vibration modes. Many parameters affect the frequency of tire vibration modes: tire size, tire construction, inflation pressure, and operating conditions such as speed, load, and temperature. This paper discusses the influence of these parameters on tire vibration modes and describes how these tire modes influence vehicle ride quality. Results from both finite element modeling and modal testing are discussed.

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