The Effect of Physical Aging on the Time-Dependent Properties of Carbon-Fiber-Reinforced Epoxy Composites PDF Download
Are you looking for read ebook online? Search for your book and save it on your Kindle device, PC, phones or tablets. Download The Effect of Physical Aging on the Time-Dependent Properties of Carbon-Fiber-Reinforced Epoxy Composites PDF full book. Access full book title The Effect of Physical Aging on the Time-Dependent Properties of Carbon-Fiber-Reinforced Epoxy Composites by ESW Kong. Download full books in PDF and EPUB format.
Author: ESW Kong
Publisher:
ISBN:
Category : Epoxy composites
Languages : en
Pages : 4
Get Book Here
Book Description
Matrix-dominated physical properties of a carbon-fiber-reinforced epoxy composite and a neat epoxy resin have been found to be affected by annealing in nitrogen below the glass transition temperature Tg. Postcured (±45)2s specimens of Thornel 300 carbon-fiber/Fiberite 934 epoxy as well as neat Fiberite 934 epoxy resin were quenched from above Tg and given a sub-Tg annealing at 140°C for times up to 105 min. The damping behavior, stress-relaxation rate, and the enthalpic state of the matrix material were found to decrease as functions of annealing time. No weight loss was observed during annealing. The time-dependent change in physical properties is explained on the basis of free-volume collapse that is related to the physical aging of the nonequilibrium glassy network of epoxy. Physical aging in network epoxy has been demonstrated to be a thermoreversible process. The kinetics of this aging process were monitored by differential scanning calorimetry, stress-relaxation tests, and dynamic mechanical analysis.
Author: ESW Kong
Publisher:
ISBN:
Category : Epoxy composites
Languages : en
Pages : 4
Get Book Here
Book Description
Matrix-dominated physical properties of a carbon-fiber-reinforced epoxy composite and a neat epoxy resin have been found to be affected by annealing in nitrogen below the glass transition temperature Tg. Postcured (±45)2s specimens of Thornel 300 carbon-fiber/Fiberite 934 epoxy as well as neat Fiberite 934 epoxy resin were quenched from above Tg and given a sub-Tg annealing at 140°C for times up to 105 min. The damping behavior, stress-relaxation rate, and the enthalpic state of the matrix material were found to decrease as functions of annealing time. No weight loss was observed during annealing. The time-dependent change in physical properties is explained on the basis of free-volume collapse that is related to the physical aging of the nonequilibrium glassy network of epoxy. Physical aging in network epoxy has been demonstrated to be a thermoreversible process. The kinetics of this aging process were monitored by differential scanning calorimetry, stress-relaxation tests, and dynamic mechanical analysis.
Author: Tom Proulx
Publisher: Springer Science & Business Media
ISBN: 1441997946
Category : Technology & Engineering
Languages : en
Pages : 394
Get Book Here
Book Description
This the third volume of six from the Annual Conference of the Society for Experimental Mechanics, 2010, brings together 56 chapters on Time-Dependent Constitutive Fracture and Failure. It presents early findings from experimental and computational investigations on Time Dependent Materials including contributions on Thermal and Mechanical Characterization, Coupled Experimental and Computational Analysis of Fracture Path Selection, Procedures for Mixed Mode Fracture Testing of Bonded Beams, and Experimental Study of Voids in High Strength Aluminum Alloys.
Author: Holm Altenbach
Publisher: Springer Nature
ISBN: 3031224019
Category : Technology & Engineering
Languages : en
Pages : 254
Get Book Here
Book Description
This book presents current trends in Mechanics of Time Dependent Materials. It covers a number of cutting-edge themes, such as characterization of linear and nonlinear mechanical behavior of viscoelastic materials and their composites, taking into consideration large deformations, low, moderate and large strain rates, as well as failure and fracture phenomena. The contributions are inspired by advanced applications in modern technologies, such as injection molding and extrusion.
Author: Bonnie Antoun
Publisher: Springer Science & Business Media
ISBN: 1461442419
Category : Technology & Engineering
Languages : en
Pages : 162
Get Book Here
Book Description
Challenges in Mechanics of Time-Dependent Materials and Processes in Conventional and Multifunctional Materials, Volume 2 represents one of seven volumes of technical papers presented at the Society for Experimental Mechanics SEM 12th International Congress & Exposition on Experimental and Applied Mechanics, held at Costa Mesa, California, June 11-14, 2012. The full set of proceedings also includes volumes on: Dynamic Behavior of Materials, Imaging Methods for Novel Materials and Challenging Applications, Experimental and Applied Mechanics, 2nd International Symposium on the Mechanics of Biological Systems and Materials 13th International Symposium on MEMS and Nanotechnology and, Composite Materials and the 1st International Symposium on Joining Technologies for Composites.
Author: National Aeronautics and Space Administration (NASA)
Publisher: Createspace Independent Publishing Platform
ISBN: 9781723395345
Category :
Languages : en
Pages : 26
Get Book Here
Book Description
The matrix dominated mechanical behavior of a graphite epoxy composite was found to be affected by sub Tg annealing. Postcured + or - 45 deg 4S specimens of Thornel 300 graphite/Narmco 5208 epoxy were quenched from above Tg and given a sub Tg annealing at 140 C for times up to 10 to the 5th power min. The ultimate tensile strength, strain to break, and toughness of the composite material were found to decrease as functions of sub Tg annealing time. No weight loss was observed during the sub Tg annealing. The time dependent change in mechanical behavior is explained on the basis of free volume changes that are related to the physical aging of the nonequilibrium glassy network epoxy. The results imply possible changes in composite properties with service time. Kong, E. S. W. Ames Research Center NASA-TM-81273, A-8495
Author:
Publisher:
ISBN:
Category :
Languages : en
Pages : 30
Get Book Here
Book Description
Author:
Publisher:
ISBN:
Category : Aeronautics
Languages : en
Pages : 940
Get Book Here
Book Description
Author:
Publisher:
ISBN:
Category :
Languages : en
Pages : 42
Get Book Here
Book Description
Author: Society of Aerospace Material and Process Engineers
Publisher:
ISBN:
Category : Airplanes
Languages : en
Pages : 282
Get Book Here
Book Description
Author:
Publisher:
ISBN:
Category : Aeronautics
Languages : en
Pages : 702
Get Book Here
Book Description
