Behrang Tavousi Tehrani and Mohammad-Zaman Kabir
NonLinear LoadDeflection Response of Shape Memory AlloysReinforced Composite Cylindrical Shells under Uniform Radial Load
373 - 379
2018
12
8
International Journal of Materials and Metallurgical Engineering
https://publications.waset.org/pdf/10009290
https://publications.waset.org/vol/140
World Academy of Science, Engineering and Technology
Shape memory alloys (SMA) are often implemented in smart structures as the active components. Their ability to recover large displacements has been used in many applications, including structural stabilityresponse enhancement and active structural acoustic control. SMA wires or fibers can be embedded with composite cylinders to increase their critical buckling load, improve their loaddeflection behavior, and reduce the radial deflections under various thermomechanical loadings. This paper presents a semianalytical investigation on the nonlinear loaddeflection response of SMAreinforced composite circular cylindrical shells. The cylinder shells are under uniform external pressure load. Based on firstorder shear deformation shell theory (FSDT), the equilibrium equations of the structure are derived. Onedimensional simplified Brinson’s model is used for determining the SMA recovery force due to its simplicity and accuracy. Airy stress function and Galerkin technique are used to obtain nonlinear loaddeflection curves. The results are verified by comparing them with those in the literature. Several parametric studies are conducted in order to investigate the effect of SMA volume fraction, SMA prestrain value, and SMA activation temperature on the response of the structure. It is shown that suitable usage of SMA wires results in a considerable enhancement in the loaddeflection response of the shell due to the generation of the SMA tensile recovery force.
Open Science Index 140, 2018