SMA Hybrid Composites for Dynamic Response Abatement Applications

Abstract

A recently developed constitutive model and a finite element formulation for predicting the thermomechanical response of SMA hybrid composite (SMAHC) structures is briefly described. Attention is focused on constrained recovery behavior in this study, but the constitutive formulation is also capable of modeling restrained or free recovery. Numerical results are shown for glass/epoxy panel specimens with embedded Nitinol actuators subjected to thermal and acoustic loads. Control of thermal buckling, random response, sonic fatigue, and transmission loss are demonstrated and compared to conventional approaches including addition of conventional composite layers and a constrained layer damping treatment. Embedded SMA actuators are shown to be significantly more effective in dynamic response abatement applications than the conventional approaches and are attractive for combination with other passive and/or active approaches.

Analysis of SMA Hybrid Composite Structures in MSC.Nastran and ABAQUS

“…Oftentimes, these loads must be endured while maintaining structural configuration for aerodynamic efficiency and while minimizing noise transmission and/or maximizing fatigue life. Additional focused discussion of these topics is given by Turner (2005). The reader is referred to Davis et al (2006) for experimental validation of the model for cases similar to those presented in this section.…”

“…For example, the fundamental frequency and RMS displacement response at 121.1 C (250 F) are 4.37/9.49 times higher/lower than their reference temperature counterparts. Additional insight into the dynamic behavior of SMAHC structures is given by Turner (2005).…”

“…Several subsequent research efforts have investigated SMAHC laminates for a variety of applications (Turner et al, 1994;Ro and Baz, 1995a, b;Chandra, 2001;Thompson and Laughlan, 2001;Kim et al, 2002;Tawfik et al, 2002). The ECTE model has been used previously in a research code to analyze the static and dynamic response of beam (Turner, 2000(Turner, , 2001a and plate (Turner, 2005) structures. It is the objective of this study to demonstrate SMAHC structural analysis using the ECTE model within the framework of commercial finite element codes.…”

“…[7][8][9][10][11] The ECTE model has been used previously in a research code to analyze the static and dynamic response of beam and plate structures. 5,12,13 It is the objective of this study to demonstrate SMAHC structural analysis using the ECTE model within the framework of commercial finite element codes. The thermally induced shape memory effect will be the focus of this work in application to structural thermoelastic, vibration, and shape control.…”

Analysis of SMA hybrid composite structures using commercial codes

“…Several subsequent research efforts have investigated SMAHC laminates for a variety of applications [7][8][9][10][11] . The ECTE model has been used previously in a research code to analyze the static and dynamic response of beam and plate structures 5,12,13 . It is the objective of this study to demonstrate SMAHC structural analysis using the ECTE model within the framework of commercial finite element codes.…”