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Effect of 1partial thickness actuation on stress concentration reduction near a holeRecently, there has been much interest in adaptive structures that can respond to a varying environment by changing their properties. Piezoelectric materials and shape memory alloys (SMA) are often used as partial thickness actuators to create such adaptivity by applied energy, usually electric curent. These actuators can be used to inducce strains in a structure and reduce stresses in regions of high stress concentration. Two of the present authors show that axisymmetric actuation strains applied troughout the thickness of a plate with a hole can reduce the stress concentration factor (SCF) in an isotropic plate from 3 to 2. However, in most cases actuators are expected to be bonded to or embedded in the plate, so that the actuation strains are applied in the actuators and not directly in the plate. The objective of this note is to show that such partial-thickness actuation cannot be used to reduce the stress concentration factor with axisymmetric actuations strain distribution.
Document ID
19950056104
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
Authors
Sensharma, P. K.
(Virginia Polytechnic Institute and State Univ. Blacksburg, VA, United States)
Kadivar, M. H.
(Virginia Polytechnic Institute and State Univ. Blacksburg, VA, United States)
Haftka, R. T.
(Virginia Polytechnic Institute and State Univ. Blacksburg, VA, United States)
Date Acquired
August 16, 2013
Publication Date
April 1, 1994
Publication Information
Publication: AIAA Journal
Volume: 32
Issue: 4
ISSN: 0001-1452
Subject Category
Structural Mechanics
Accession Number
95A87703
Funding Number(s)
CONTRACT_GRANT: DAAL-03-92-G-0180
CONTRACT_GRANT: NAG1-168
Distribution Limits
Public
Copyright
Other

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