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Thermal transport in composite materials and their interfaces
Aircrafts use its fuel as a primary heat sink in managing thermal loads. The thermal loads have steadily increased to the upper temperature limit of the electronics in numerous operations scenarios; thus limiting the system performance, such as of F-22 and F-35 aircrafts. The thermal load is anticipated to increase even more in future systems that need to be addressed. In addition, the thermal management issues for high energy laser (HEL) systems have become even more challenging. The above system requirements demand significant improvement in the thermal energy transport efficiency in thermal equipment, its devices, as well as in system integration. It is well known that materials' interface and its configuration is extremely important in transporting thermal energy as the phonon transport through the materials interface dictates the transport efficiency. Similarly, the thermal transport in heterogeneous material systems, such as composites, is essentially controlled by the phonon scattering phenomena at the materials interfaces due to mismatch in material properties. Such phenomena are also prevalent in joints or component interfaces. This article discusses the mechanism of thermal transport in aerospace composite materials, in conjunction to thermo-mechanical performance, from the perspective of various experimental techniques as well as continuum and molecular modeling, encompassing its multi-scale behavior and its dependence on morphology and orientation of materials as well as their interfaces.
Thermal transport in composite materials and their interfaces
Aircrafts use its fuel as a primary heat sink in managing thermal loads. The thermal loads have steadily increased to the upper temperature limit of the electronics in numerous operations scenarios; thus limiting the system performance, such as of F-22 and F-35 aircrafts. The thermal load is anticipated to increase even more in future systems that need to be addressed. In addition, the thermal management issues for high energy laser (HEL) systems have become even more challenging. The above system requirements demand significant improvement in the thermal energy transport efficiency in thermal equipment, its devices, as well as in system integration. It is well known that materials' interface and its configuration is extremely important in transporting thermal energy as the phonon transport through the materials interface dictates the transport efficiency. Similarly, the thermal transport in heterogeneous material systems, such as composites, is essentially controlled by the phonon scattering phenomena at the materials interfaces due to mismatch in material properties. Such phenomena are also prevalent in joints or component interfaces. This article discusses the mechanism of thermal transport in aerospace composite materials, in conjunction to thermo-mechanical performance, from the perspective of various experimental techniques as well as continuum and molecular modeling, encompassing its multi-scale behavior and its dependence on morphology and orientation of materials as well as their interfaces.
Thermal transport in composite materials and their interfaces
Wärmeleitung in Verbundwerkstoffen und ihren Grenzflächen
Varshney, Vikas (author) / Anderson, David P. (author) / Ganguli, Sabyasachi (author) / Sihn, Sangwook (author) / Patnaik, Soumya S. (author) / Farmer, Barry L. (author) / Roy, Ajit K. (author)
2008
12 Seiten, 9 Bilder, 11 Quellen
(nicht paginiert)
Conference paper
English
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