Thermoelastic damping is a source of intrinsic material damping due to thermoelasticity present in almost all materials. As the name thermoelastic suggests, it describes the coupling between the elastic field in the structure caused by deformation and the temperature field.
Definitionedit
In any vibrating structure, the strain field causes a change in the internal energy such that compressed region becomes hotter (assuming a positive coefficient of thermal expansion) and extended region becomes cooler. The mechanism responsible for thermoelastic damping is the resulting lack of thermal equilibrium between various parts of the vibrating structure. Energy is dissipated when irreversible heat flow driven by the temperature gradient occurs.
The earliest study of thermoelastic damping can be found in Clarence Zener’s classical work,[1][2] in 1937, in which he studied thermoelastic damping in beams undergoing flexural vibrations. Flexural vibrations cause alternating tensile and compressive strains to build up on opposite sides of the neutral axis leading to a thermal imbalance. Irreversible heat flow which is driven by the temperature gradient causes vibrational energy to be dissipated.
Referencesedit
^Zener, Clarence (1937-08-01). "Internal Friction in Solids. I. Theory of Internal Friction in Reeds". Physical Review. 52 (3). American Physical Society (APS): 230–235. Bibcode:1937PhRv...52..230Z. doi:10.1103/physrev.52.230. ISSN 0031-899X.
^Zener, Clarence (1938-01-01). "Internal Friction in Solids II. General Theory of Thermoelastic Internal Friction" (PDF). Physical Review. 53 (1). American Physical Society (APS): 90–99. Bibcode:1938PhRv...53...90Z. doi:10.1103/physrev.53.90. ISSN 0031-899X.
April 10, 2024
thermoelastic, damping, source, intrinsic, material, damping, thermoelasticity, present, almost, materials, name, thermoelastic, suggests, describes, coupling, between, elastic, field, structure, caused, deformation, temperature, field, definition, editin, vib. Thermoelastic damping is a source of intrinsic material damping due to thermoelasticity present in almost all materials As the name thermoelastic suggests it describes the coupling between the elastic field in the structure caused by deformation and the temperature field Definition editIn any vibrating structure the strain field causes a change in the internal energy such that compressed region becomes hotter assuming a positive coefficient of thermal expansion and extended region becomes cooler The mechanism responsible for thermoelastic damping is the resulting lack of thermal equilibrium between various parts of the vibrating structure Energy is dissipated when irreversible heat flow driven by the temperature gradient occurs The earliest study of thermoelastic damping can be found in Clarence Zener s classical work 1 2 in 1937 in which he studied thermoelastic damping in beams undergoing flexural vibrations Flexural vibrations cause alternating tensile and compressive strains to build up on opposite sides of the neutral axis leading to a thermal imbalance Irreversible heat flow which is driven by the temperature gradient causes vibrational energy to be dissipated References edit Zener Clarence 1937 08 01 Internal Friction in Solids I Theory of Internal Friction in Reeds Physical Review 52 3 American Physical Society APS 230 235 Bibcode 1937PhRv 52 230Z doi 10 1103 physrev 52 230 ISSN 0031 899X Zener Clarence 1938 01 01 Internal Friction in Solids II General Theory of Thermoelastic Internal Friction PDF Physical Review 53 1 American Physical Society APS 90 99 Bibcode 1938PhRv 53 90Z doi 10 1103 physrev 53 90 ISSN 0031 899X Retrieved from https en wikipedia org w index php title Thermoelastic damping amp oldid 1217303929, wikipedia, wiki, book, books, library,
