History-Dependent Thermomechanical Properties of Graphite/Aluminum Unidirectional Composites

History-Dependent Thermomechanical Properties of Graphite/Aluminum Unidirectional Composites PDF Author: FW. Crossman
Publisher:
ISBN:
Category : Composite materials
Languages : en
Pages : 22

Get Book Here

Book Description
A high-modulus graphite(VS0054)/aluminum(6061) unidirectional composite was tested to characterize its thermomechanical properties as influenced by the thermomechanical history. The experiments included (1) tension tests at four different temperatures under monotonically increasing load followed by unloading; (2) measurement of the cyclic thermal expansion in the longitudinal and transverse directions, conducted on annealed and T-6 heat-treated composite specimens; and (3) tests on the thermal expansion behavior of specimens simultaneously held at a constant transverse tensile stress during the thermal cycling. The tension test results show that the yield strength of the composite is greatly influenced by the residual stress, which may vary with the thermomechanical loading history. During thermal cycling the aluminum matrix of the annealed specimen undergoes elastic and plastic deformation owing to the thermal mismatch between the matrix and the fiber. This results in a characteristic cyclic nonlinear response during thermal cycling, as observed by the cyclic thermal expansion measurement.

History-Dependent Thermomechanical Properties of Graphite/Aluminum Unidirectional Composites

History-Dependent Thermomechanical Properties of Graphite/Aluminum Unidirectional Composites PDF Author: FW. Crossman
Publisher:
ISBN:
Category : Composite materials
Languages : en
Pages : 22

Get Book Here

Book Description
A high-modulus graphite(VS0054)/aluminum(6061) unidirectional composite was tested to characterize its thermomechanical properties as influenced by the thermomechanical history. The experiments included (1) tension tests at four different temperatures under monotonically increasing load followed by unloading; (2) measurement of the cyclic thermal expansion in the longitudinal and transverse directions, conducted on annealed and T-6 heat-treated composite specimens; and (3) tests on the thermal expansion behavior of specimens simultaneously held at a constant transverse tensile stress during the thermal cycling. The tension test results show that the yield strength of the composite is greatly influenced by the residual stress, which may vary with the thermomechanical loading history. During thermal cycling the aluminum matrix of the annealed specimen undergoes elastic and plastic deformation owing to the thermal mismatch between the matrix and the fiber. This results in a characteristic cyclic nonlinear response during thermal cycling, as observed by the cyclic thermal expansion measurement.

American Special Technical Publication

American Special Technical Publication PDF Author:
Publisher: ASTM International
ISBN:
Category :
Languages : en
Pages : 589

Get Book Here

Book Description


Composite Materials

Composite Materials PDF Author: Isaac M. Daniel
Publisher: ASTM International
ISBN: 9780803106956
Category : Technology & Engineering
Languages : en
Pages : 608

Get Book Here

Book Description


NASA Technical Paper

NASA Technical Paper PDF Author:
Publisher:
ISBN:
Category : Astronautics
Languages : en
Pages : 368

Get Book Here

Book Description


Inelastic Deformation of Composite Materials

Inelastic Deformation of Composite Materials PDF Author: George J. Dvorak
Publisher: Springer Science & Business Media
ISBN: 1461391091
Category : Technology & Engineering
Languages : en
Pages : 763

Get Book Here

Book Description
Polymer composites were introduced for the aerospace industry as light, strong, stiff materials, and adopted by the construction and automobile industries, among others. Meanwhile, composite materials have been introduced to fulfill the uses that these conventional materials could not, such as in extreme environments. The research for new composites includes not only new polymer systems, but metals, ceramics and intermetallic systems as well. This volume contains a selection of recent work by leading researchers in micromechanics on the topics of prediction of overall properties of elastic, perfectly bonded systems, problems associated with inelastic deformation of the phase, debonding at interfaces and growth of distributed damage. Many familiar aspects of mechanical behavior, such as fatigue, fracture, strength and buckling, etc. have been reexamined and adapted for these new systems.

Composite Materials

Composite Materials PDF Author:
Publisher:
ISBN:
Category : Composite materials
Languages : en
Pages : 608

Get Book Here

Book Description


Reference Book for Composites Technology

Reference Book for Composites Technology PDF Author: Stuart M. Lee
Publisher: CRC Press
ISBN: 9780877625643
Category : Technology & Engineering
Languages : en
Pages : 384

Get Book Here

Book Description
The eleven contributions comprising the first volume address topics that include the history of composites, epoxy resins, fiber reinforced glasses and glass ceramics for high performance applications, aramid fiber reinforcements (specifically, Vniivlon/Polyamidobenzimidazole--the USSR's aramid fiber-forming polymer). Volume two (565-4) has nine articles on, among other subjects, environmental effects, prediction of failure strength of anisotropic materials, properties characterization, creep. No index in either book. Acidic paper. Annotation copyrighted by Book News, Inc., Portland, OR

Temperature Dependent Nonlinear Metal Matrix Laminae Behavior

Temperature Dependent Nonlinear Metal Matrix Laminae Behavior PDF Author:
Publisher:
ISBN:
Category :
Languages : en
Pages : 128

Get Book Here

Book Description
An analytical method is described for computing the nonlinear thermal and mechanical response of laminated plates. The material model focuses upon the behavior of metal matrix materials by relating the nonlinear composite response to plasticity effects in the matrix. The foundation of the analysis is the unidirectional material model which is used to compute the instantaneous properties of the lamina based upon the properties of the fibers and matrix. The unidirectional model assumes that the fibers properties are constant with temperature and assumes that the matrix can be modelled as a temperature dependent, bilinear, kinematically hardening material. An incremental approach is used to compute average stresses in the fibers and matrix caused by arbitrary mechanical and thermal loads. The layer model is incorporated in an incremental laminated plate theory to compute the nonlinear response of laminated metal matrix composites of general orientation and stacking sequence. The report includes comparisons of the method with other analytical approaches and compares theoretical calculations with measured experimental material behavior. A section is included which describes the limitations of the material model.

Effects of Thermal Cycling on Graphite-fiber-reinforced 6061 Aluminum

Effects of Thermal Cycling on Graphite-fiber-reinforced 6061 Aluminum PDF Author: Gregory A. Dries
Publisher:
ISBN:
Category : Aluminum alloys
Languages : en
Pages : 36

Get Book Here

Book Description


Temperature Dependent Nonlinear Metal Matrix Laminate Behavior

Temperature Dependent Nonlinear Metal Matrix Laminate Behavior PDF Author: David J. Barrett
Publisher:
ISBN:
Category : Metals
Languages : en
Pages : 128

Get Book Here

Book Description