Elastic constants and internal friction of an SiC-fiber-reinforced Ti-alloy-matrix crossply composite: measurement and theory

Ogi, H.; Takashima, K.; Ledbetter, H.; Dunn, L. M.; Shimoike, G.; Hirao, M.; Bowen, P.

doi:https://doi.org/10.1016/S1359-6454(99)00124-X

Elastic constants and internal friction of an SiC-fiber-reinforced Ti-alloy-matrix crossply composite: measurement and theory

Ogi, H.; Takashima, K.; Ledbetter, H. et al.

Acta Materialia, 1999, 47(9), 2787-2796

Number of Access:380（2025-11-25 02:18 Counts）

Identifier to cite or link to this item: https://hdl.handle.net/11094/84191

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Title	Elastic constants and internal friction of an SiC-fiber-reinforced Ti-alloy-matrix crossply composite: measurement and theory
Creator	NRID 1000090252626 1000090252626 researchmap permalink read0042771 read0042771 Scopus Author ID 35563683500 35563683500 ORCID 0000-0002-9602-5194 0000-0002-9602-5194 CreatorName Ogi, H.
	CreatorName Takashima, K.
	CreatorName Ledbetter, H.
	CreatorName Dunn, L. M.
	CreatorName Shimoike, G.
	NRID 1000080112027 1000080112027 CreatorName Hirao, M.
	CreatorName Bowen, P.
Subject	Acoustic methods
	Composites
	Elastic mechanical properties
	Electromagnetic acoustic resonance
	Internal friction
Abstract	The complete elastic-constant tensor Cij and the corresponding internal Qij-1 for a crossply composite are measured. It consists of silicon-carbide fibers in a Ti-6Al-4V matrix; it contained 35 vol.% fibers. With tetragonal symmetry, this composite possesses six independent Cij and Qij-1. Principally, two measurement methods were used: noncontacting and point-contact resonance-ultrasound spectroscopy. Specimens were rectangular parallelepipeds measuring a few to several millimeters. By changing the magnetic-field direction, which is needed for the Lorentz-force coupling, a particular macroscopic-vibration-mode group among the eight groups for free vibration of a rectangular parallelepiped could be independently excited and detected. This provides a big advantage in identifying the vibration modes of the observed resonance peaks, whose frequencies yield the Cij by solving an inverse problem. Contactless coupling allowed the measurement of intrinsic internal friction, avoiding the energy loss associated with contact coupling. The internal-friction tensor was determined by a free-decay method. Theoretical calculations were made using an extended Mori-Tanaka mean-field theory and good theory-measurement agreement was found.
Publisher	Elsevier Ltd
Source Title	Acta Materialia
Volume (Issue)	47(9)
Page	2787-2796
Date of Issued	1999-07-12
Language	English
Handle URL	https://hdl.handle.net/11094/84191
PISSN	13596454
NCID	AA11521780
NCID	AA1106787X
Relation.isIdenticalTo	DOI (Publisher Version) https://doi.org/10.1016/S1359-6454(99)00124-X
Access Rights	metadata only access
Category	学術雑誌論文 Journal Article

Resource Type	journal article
Local Type	Journal Article
DCMI Type	Text
DCTERMS.bibliographicCitation	Acta Materialia. 1999, 47(9), p. 2787-2796
DC.title	Elastic constants and internal friction of an SiC-fiber-reinforced Ti-alloy-matrix crossply composite: measurement and theory
DC.creator	Ogi, H.
	Takashima, K.
	Ledbetter, H.
	Dunn, L. M.
	Shimoike, G.
	Hirao, M.
	Bowen, P.
DC.publisher	Elsevier Ltd
DC.language' scheme='DCTERMS.RFC1766	English
DC.type' scheme='DCTERMS.DCMIType	Text
DCTERMS.issued' scheme='DCTERMS.W3CDTF	1999-07-12
DC.identifier	https://doi.org/10.1016/S1359-6454(99)00124-X
DC.subject	Acoustic methods
	Composites
	Elastic mechanical properties
	Electromagnetic acoustic resonance
	Internal friction
DCTERMS.abstract	The complete elastic-constant tensor Cij and the corresponding internal Qij-1 for a crossply composite are measured. It consists of silicon-carbide fibers in a Ti-6Al-4V matrix; it contained 35 vol.% fibers. With tetragonal symmetry, this composite possesses six independent Cij and Qij-1. Principally, two measurement methods were used: noncontacting and point-contact resonance-ultrasound spectroscopy. Specimens were rectangular parallelepipeds measuring a few to several millimeters. By changing the magnetic-field direction, which is needed for the Lorentz-force coupling, a particular macroscopic-vibration-mode group among the eight groups for free vibration of a rectangular parallelepiped could be independently excited and detected. This provides a big advantage in identifying the vibration modes of the observed resonance peaks, whose frequencies yield the Cij by solving an inverse problem. Contactless coupling allowed the measurement of intrinsic internal friction, avoiding the energy loss associated with contact coupling. The internal-friction tensor was determined by a free-decay method. Theoretical calculations were made using an extended Mori-Tanaka mean-field theory and good theory-measurement agreement was found.
DC.format	84191
citation_title	Elastic constants and internal friction of an SiC-fiber-reinforced Ti-alloy-matrix crossply composite: measurement and theory
citation_author	Ogi, H.
	Takashima, K.
	Ledbetter, H.
	Dunn, L. M.
	Shimoike, G.
	Hirao, M.
	Bowen, P.
citation_publisher	Elsevier Ltd
citation_language	English
citation_date	1999-07-12
citation_journal_title	Acta Materialia
citation_volume	47
citation_issue	9
citation_firstpage	2787
citation_lastpage	2796
citation_doi	https://doi.org/10.1016/S1359-6454(99)00124-X
citation_public_url	https://hdl.handle.net/11094/84191

Elastic constants and internal friction of an SiC-fiber-reinforced Ti-alloy-matrix crossply composite: measurement and theory

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