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Indian Journal of Engineering and Materials Sciences (IJEMS) >
IJEMS Vol.18 [2011] >
IJEMS Vol.18(1) [February 2011] >
| Title: | Modelling the thermomechanical behaviour of shape memory polymer materials |
| Authors: | Sinha, Rahul P
Jarali, Chetan S
Raja, S |
| Keywords: | Shape memory polymer
Shape memory effect
Constitutive model |
| Issue Date: | Feb-2011 |
| Publisher: | NISCAIR-CSIR, India |
| Abstract: | The increasing applications of smart structures in technology development
have led to a wide variety of new high performance materials, especially smart
polymers. In the present work, a uniaxial model for shape memory polymer (SMP)
is analyzed and a consistent form of the constitutive law is proposed. The
coefficient of thermal expansion is expressed using the rule of mixtures
approach. In this study, a comparison is made between thermal strains computed
by using the analogous rule of mixture equation and the empirical relation that
has been stated on the basis of experimental findings. The inconsistency in the
computation of coefficient of thermal expansion is addressed. Furthermore, the
consistent form of the stored strain and thermal strain expressions are also
presented using fourth order Runge-Kutta method. A noteworthy difference is
observed due to change in temperature. Moreover, the difference between the
proposed analytical solutions with the empirical relation is brought out.
Finally, the consistent form of the constitutive model with modified CTE and
strain expressions for the SMP is presented. |
| Page(s): | 15-23 |
| CC License: |  CC Attribution-Noncommercial-No Derivative Works 2.5 India |
| ISSN: | 0975-1017 (Online); 0971-4588 (Print) |
| Source: | IJEMS Vol.18(1) [February 2011]
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