Sandwich-structured composite

About: Sandwich-structured composite is a research topic. Over the lifetime, 5853 publications have been published within this topic receiving 101126 citations.

Perforation of Sandwich Panels with Honeycomb Cores by Hemispherical Nose Projectiles

Abstract: Analytical models for the static and low-velocity perforation of composite sandwich panel with woven E-glass/epoxy prepreg facesheets and aluminum honeycomb core are developed. The analytical model...

Optimal design of compression corrugated panels

Abstract: Compression panels comprised of a corrugated core bonded to either one or two face sheets are optimally designed for minimum weight. Results obtained from two optimization procedures are compared: naive optimization where simultaneous occurrence of failure modes is assumed, and sequential quadratic programming (SQP) based optimization. A total of eight different panel geometries are considered, including hat- and blade-stiffened panels, and square, triangular and trapezoidal cores. From a weight standpoint, panels with hat-stiffeners are found to be the most efficient for the given boundary conditions, about 40% lighter at some load levels than the least efficient-sandwich panels with a square core.

Investigation of bending modulus of fiber‐reinforced syntactic foams for sandwich and structural applications

Abstract: Polymer composite foams or syntactic foams containing 0.9, 1.76, 2.54, 3.54 and 4.5 vol% of E-glass short fibers were processed and subjected to a three-point bending test. The results show that the flexural modulus increased with fiber content, with the exception of 1.76% and 3.5% of fibers. This deviation was due to a higher void content for 1.76% and a non-uniform distribution of fibers in the polymer composite foam system for 3.5%. However, in general, the ncorporation of chopped strand fibers improved the flexural behavior of the syntactic foam system without much variation in density, thus making the reinforced syntactic foams act as improved core materials for sandwich and other structural applications.

Sound transmission loss characteristics of sandwich aircraft panels: Influence of nature of core

Abstract: Sandwich panel which has a design involving acoustic comfort is always denser and larger in size than the design involving mechanical strength. The respective short come can be solved by exploring the impact of core geometry on sound transmission characteristics of sandwich panels. In this aspect, the present work focuses on the study of influence of core geometry on sound transmission characteristics of sandwich panels which are commonly used as aircraft structures. Numerical investigation has been carried out based on a 2D model with equivalent elastic properties. The present study has found that, for a honeycomb core sandwich panel in due consideration to space constraint, better sound transmission characteristics can be achieved with lower core height. It is observed that, for a honeycomb core sandwich panel, one can select cell size as the parameter to reduce the weight with out affecting the sound transmission loss. Triangular core sandwich panel can be used for low frequency application due to its ...