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Search Publications by: Donald L. Hunston (Assoc)

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Displaying 176 - 200 of 250

Strain Rate Dependence of Fracture in a Rubber-Toughened Epoxy System

January 1, 2002
Author(s)
D T. Raghavan, J He, Donald L. Hunston, D Hoffman
The toughening mechanisms in rubber-modified epoxies appear to be viscoelastic in nature since the fracture behavior is dependent on loading rate. This behavior has been studied and modeled only for the most common toughened epoxy system. The present work

Analyzing Load History Dependence of Fracture in Structural Adhesives

June 1, 2001
Author(s)
Donald L. Hunston
The most common toughening mechanisms in structural adhesives are viscoelastic processes which means that the fracture enrgies for bulk adhesive specimens and bonded joints will vary with loading history. Although this is well known, relaviely few studies

Continuous Parallel Fiber Composites: Fracture

January 1, 2001
Author(s)
B S. Majumdar, Donald L. Hunston
The objective in this chapter is to briefly review the fracture behavior of unidirectional composites with special attention to mechanisms that have been developed to improve toughness. The focus is on failure involving the propagation of cracks for

The Application of Optical Coherence Tomography to Problems in Polymer Matrix Composites

January 1, 2001
Author(s)
Joy Dunkers, Frederick R. Phelan Jr., D P. Sanders, M J. Everett, William H. Green, Donald L. Hunston, Richard~undefined~undefined~undefined~undefined~undefined Parnas
The Composites Group at the National Institute of Standards and Technology has found optical coherence tomography (OCT) to be a powerful tool for non-destructive characterization of polymer matrix composites. Composites often exhibit superior properties to

Single Fiber Composites: A New Methodology for Determinig Interfacial Shear Strength

September 1, 2000
Author(s)
Gale A. Holmes, Donald L. Hunston, Walter G. McDonough, R C. Peterson
Two of the critical factors controlling the long-term performance and durability of composites in structural applications is the fiber-matrix interfacial shear strength (IFSS) and the durability of the fiber-matrix interface. The single fiber fragmentation