The Effect of Geometrical Parameters of Cylindrical Composite Lattice Structures on Buckling Behavior
الموضوعات : فصلنامه شبیه سازی و تحلیل تکنولوژی های نوین در مهندسی مکانیک
علی لطیفی رستمی
1
(کارشناس ارشد، دانشکده مکانیک، دانشگاه صنعتی نوشیروانی بابل، مازندران، ایران)
رضا اکبری آلاشتی
2
(دانشیار، دانشکده مهندسی مکانیک، دانشگاه صنعتی نوشیروانی بابل، مازندران، ایران)
امین کلاه دوز
3
(استادیار، دانشکده مهندسی مکانیک، دانشگاه آزاد اسلامی، واحد خمینی شهر)
الکلمات المفتاحية: FEM, Buckling analysis, Composite, Critical Lattice Structure, Rib (Stiffener),
ملخص المقالة :
Due to their light weights and high load carrying capacities, composite structures are widely used in various industrial applications especially in aerospace industry. Stiffening ribs are the main features of lattice type composite structures. Strength to weight ratio is known to be as one of the most critical design parameter in these structures. In this study, the effect of some parameters such as the physical characteristics of the material, shell thickness, angle, thickness and number of ribs on distribution of stresses and buckling loads of shell are investigated. For this purpose, 3D finite element analysis using ANSYS software explicitly was done and then compared with experimental test results. Increasing the thickness of the outer shell causes the structural strength will rise to 50 percent. The next effective parameter is reduction of rib angle which provides an increase of 30 percent in specific load. Although Stiffenerrs (ribs) have a major role in load carrying, but increasing the rib number causes the structural weight rises, thus compared with the two previous parameters do not have a significant effect on the strength of structures
[1] Januky N., Knight N.F., Ambur D.R., Optimal design of general stiffened composite circular cylinders for global buckling with strength constraints, Composite Structure, vol. 41, No. 3-4, 1998, pp. 243-252.
[2] Vasiliev V.V., Barynin V.A., Rasin A.F., Anisogrid lattice structures-survey of development and application, Composite Structure, vol. 54, No. 2-3, 2001, pp. 361-371.
[3] Tafreshi A., Buckling and post-buckling analysis of composite cylindrical shells with cutouts subjected to internal pressure and axial compressive loads, International Journal of Pressure Vessels and Piping, vol. 79, No. 5, 2002, pp. 351-359.
[4] Wodesenbent E., Kidane S., Pang S.S., Optimization for buckling load of grid stiffened composite panels, Composite Structure, vol. 60, No. 2, 2003, pp. 159-169.
[5] Hillburger M.W., Starnes Jr. J.M., Buckling behavior of compression-loaded composite cylindrical shells with reinforced cutouts, International Journal of Non-Linear Mechanics, vol. 40, No. 7, 2005, pp. 1005-1021.
[6] Vasiliev V.V., Razin A.F., Anisogrid composite lattice structures for spacecraft and aircraft applications, Composite Structure, vol. 76, No. 1-2, 2006, pp. 182-189.
[7] Craig K.J., Stander N., Optimization of shell buckling incorporating Karhunen-Loeve-based geometrical imperfections, Structural and Multidisciplinary Optimization, vol. 37, No. 2, 2008, pp. 185-194.
[8] Totaro G., Grdal Z., Optimal design of composite lattice shell structures for aerospace applications, Aerospace Science and Technology, Vol. 13, No. 4-5, 2009, pp. 157–164.
[9] Hualin F., Fengnian J., Daining F., Uniaxial local buckling strength of periodic lattice composites, Materials and Design, Vol. 30, No. 10, 2009, pp. 4136–4145.
[10] Yazdani M., Rahimi H., The effects of Helical Ribs’ Number and Grid Types on the Buckling of Thin-Walled GFRP-Stiffened Shells under Axial Loading, Journal of Reinforced Plastics and Composites, vol. 29, No. 19, 2010, pp. 2568-2575.
[11] Mozorov E.V., Lopatin A.V., Nesterov V.A., Finite element and buckling analysis of anisogrid composite lattice cylidrical shells, Composite Structure, vol. 93, No. 2, 2011, pp. 308–323.
[12] Buragohain M., Velmurugan R., Study of filament wound grid-stiffened composite cylindrical structures, Composite Structure, vol. 93, No. 2, 2011, pp. 1031–1038.
[13] Vasiliev V.V., Barynin V.A., Razin A.F., Anisogrid composite lattice structures – Development and aerospace applications, Composite Structure, vol. 94, No. 3, 2012, pp. 1117–1127.
