Now showing items 1-10 of 131
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 ...
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 ...
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 ...
Micromechanics-based approach to predict strength and stiffness of composite materials
(Virginia Tech, 1996-08-16)
One of the key issues concerning the durability of composites is the strength and stiffness degradation during service. Traditionally, these materials have been analyzed by methods which do not take into account variations ...
Numerical Simulations of the Aeroelastic Response of an Actively Controlled Flexible Wing
(Virginia Tech, 1999-06-24)
A numerical simulation for evaluating methods of predicting and controlling the response of an elastic wing in an airstream is discussed. The technique employed interactively and simultaneously solves for the response in ...
Micromechanics of strength-related phenomena in composite materials
(Virginia Tech, 1993-05-05)
Durability design with reliability methods: a case study of automotive wheel assemblies
(Virginia Tech, 1992)
Experimental verification and development of structural identification techniques on a grid
(Virginia Tech, 1990-04-05)
<p> The work that is reported herein deals with system identification methods for large flexible structures. Proposed space missions for the future include the deployment of large flexible structures, e.g., NASA's proposed ...