Now showing items 1-10 of 269
Durability of Advanced Woven Composites in Aerospace Applications
(Virginia Tech, 1999-06-16)
The objective of this project was to evaluate and model the effects of moisture, temperature, and combined hygrothermal aging on the durability of a graphite/epoxy woven composite material system. Imposed environmental ...
An experimental and theoretical investigation into the influence of hysteretic damping on the dynamic behavior of a three-beam structure
(Virginia Tech, 1996-02-05)
<p>In this thesis, we theoretically and experimentally investigate the linear and nonlinear dynamic behavior of a frame structure, which frequently occurs in engineering applications. The structure consists of three ...
Design and application of a quasistatic crush test fixture for investigating scale effects in energy absorbing composite plates
(Virginia Tech, 1993-02-05)
<p>A crush test fixture for measuring energy absorption of flat plate specimens from an earlier study was redesigned to eliminate the problem of binding of the load transfer platen with the guide posts. Further modifications ...
Mark II Dual-Mode Vehicle Design and Analysis
(Virginia Tech, 1998-07-28)
In the Spring of 1998, the Virtual Corporation at Virginia Tech demonstrated the ability of Linear Switched Reluctance Propulsion (LSRP) to propel a vehicle on a track using only the interaction of a passive magnetic ...
Finite element analysis of failure modes in dynamically loaded pre-cracked steel plates
(Virginia Tech, 1995-12-01)
Analysis of fiber-reinforced composite plates utilizing curvilinear fiber trajectories
(Virginia Tech, 1995-05-05)
<p>Four plates with centrally located circular holes were manufactured using a fiber placement technique. With two plates the fibers were steered around the holes in curvilinear trajectories. With the two other plates the ...
Nonlinear dynamics of systems involving widely spaced frequencies
(Virginia Tech, 1993)
Feasibility of fiber reinforced composite materials used in highway bridge superstructures
(Virginia Tech, 1988-12-05)
<p>Composite materials are considered here as structural materials of highway bridge superstructures. Bridge deck designs can be done according to <i>AASHTO</i><sup>1</sup> specification and elastic design concepts. </p><p> ...
Improving fatigue life predictions: theory and experiment on unidirectional and crossply polymer matrix composites
(Virginia Tech, 1996-05-15)
A method is presented by which fatigue life predictions of polymer matrix composites may be improved. First a "critical element", whose failure defines global failure of the material. is identified. The global stiffness ...
Buried Pipe Life Prediction in Sewage Type Environments
(Virginia Tech, 1999-02-06)
In this study, we develop a method of life prediction of buried pipe using the concepts of a characteristic damage state and damage accumulation. A stress analysis corresponding to the different types of load during service ...