Finite Element Analysis of the Random Response Suppression of Composite Panels at Elevated Temperatures Using Shape Memory Alloy Fibers

摘要

A feasibility study on the use of shape memory alloys (SMA) for suppression of the random response of composite panels due to acoustic loads at elevated temperatures is presented. The constitutive relations for a composite lamina with embedded SMA fibers are developed. The finite element governing equations and the solution procedures for a composite plate subjected to combined acoustic and thermal loads are presented. Solutions include: (1) critical buckling temperature, (2) at panel random response, (3) thermal postbuckling detection, and (4) random response of a thermally buckled panel. The preliminary results demonstrate that the SMA fibers can completely eliminate the thermal postbuckling detection and significantly reduce the random response at elevated temperatures.