Grid stiffened composite

Jaunky, N. and Knight Jr, N.F. (1996) Formulation of an improved smeared stiffener theory for buckling analysis of grid-stiffened composite panels. Composites Part B Engineering, 27B, 519-526. 

Kidane, S., Li, G., Helms, J.E., Pang, S.S. and Woldesenbet, E. (2003) Analytical buckling load analysis of grid stiffened composite cylinders. Composites Part B Engineering, 33, 1-9. 

Jadhav, P. and Mantena, P.R. (2007) Parametric optimization of grid-stiffened composite panels for maximizing their performance under transverse loading. Composite Structures, 77, 353-363. 

Li, G. and Cheng, J.Q. (2007) A generalized analytical modeling of grid stiffened composite structures. Journal of Composite Materials, 41, 2939-2969. 

Huybrechts SM, Hahn SE, Meink TE. Grid-stiffened structures a survey of fabrication, analysis and design methods. In Proceedings of 12th international conference on composite materials (ICCM), Paris France 1999. 

Fiber reinforced thermosetting polymer composites have been used in the form of laminate, sandwich, grid stiffened, stitched, Z-pinned, three-dimensional (3-D) woven fabric, and hybrid structures. In addition to carrying the designed static/dynamic loads, most composite stmcmres experience some kind of low or high velocity impact incidents during their life cycle. A low velocity impact is not uncommon. For example, dropping a tool on to a composite stmcmre... 

Li, G. and Velamarthy, R.C. (2008) Fabricating, testing, and modeling of advanced grid stiffened fiber reinforced polymer tube encased concrete cylinders. Journal of Composite Materials, 42, 1103-1124. 

Next, we will present applications of the CTH scheme in several real-world composite stractures. They arc fiber reinforced syntactic foam cored sandwich structures, sandwich stractures with a continuous fiber reinforced grid stiffened syntactic foam core, and 3-D woven fabric reinforced polymer composite structures. Of course, the core or the polymer composite is based on the same thermosetting PSMP as discussed above. 

Huybrechts, S.M., Meink, T.E., Wegner, P.M., and Ganley, G.M. (2002) Manufacturing theory for advanced grid stiffened structures. Composites Part A Applied Science and Manufacturing, 33, 155-161. 

Figure 7.23 Closing of the macroscopic crack due to shape recovery of the SMP grid skeleton through localized heating (a) an SMP orthogrid stiffened thermoset polymer composite with a macroscopic crack at the center of the central bay and (b) FEA results for the displacement field in the Y direction when stored stresses in SMP fibers are released by a local heating process. The magnified view shows closure of the macroscopic crack. Source [20] Reproduced with permission from the Royal Society...

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