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Proceedings Paper

Interfacial stresses in shape memory alloy-reinforced composites
Author(s): S. R. Hiremath; Maulik Prajapati; S. Rakesh; D. Roy Mahapatra
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Paper Abstract

Debonding of Shape Memory Alloy (SMA) wires in SMA reinforced polymer matrix composites is a complex phenomenon compared to other fabric fiber debonding in similar matrix composites. This paper focuses on experimental study and analytical correlation of stress required for debonding of thermal SMA actuator wire reinforced composites. Fiber pull-out tests are carried out on thermal SMA actuator at parent state to understand the effect of stress induced detwinned martensites. An ASTM standard is followed as benchmark method for fiber pull-out test. Debonding stress is derived with the help of non-local shear-lag theory applied to elasto-plastic interface. Furthermore, experimental investigations are carried out to study the effect of Laser shot peening on SMA surface to improve the interfacial strength. Variation in debonding stress due to length of SMA wire reinforced in epoxy are investigated for non-peened and peened SMA wires. Experimental results of interfacial strength variation due to various L/d ratio for non-peened and peened SMA actuator wires in epoxy matrix are discussed.

Paper Details

Date Published: 20 March 2014
PDF: 8 pages
Proc. SPIE 9058, Behavior and Mechanics of Multifunctional Materials and Composites 2014, 905806 (20 March 2014); doi: 10.1117/12.2047331
Show Author Affiliations
S. R. Hiremath, Indian Institute of Science (India)
Maulik Prajapati, Indian Institute of Science (India)
S. Rakesh, Indian Institute of Science (India)
D. Roy Mahapatra, Indian Institute of Science (India)

Published in SPIE Proceedings Vol. 9058:
Behavior and Mechanics of Multifunctional Materials and Composites 2014
Nakhiah C. Goulbourne; Hani E. Naguib, Editor(s)

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