scispace - formally typeset
Search or ask a question
Topic

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.


Papers
More filters
Journal ArticleDOI
TL;DR: In this paper, a rational analytical model is presented and used to evaluate the effective elastic modulus, shear modulus and degree of composite interaction of the panels to resist one-way bending.
Abstract: This paper presents the findings of a research program that was undertaken to evaluate the static and fatigue characteristics of an innovative 3-D glass fiber reinforced polymer (GFRP) sandwich panel proposed for civil infrastructure and transportation applications. The research consists of analytical modeling verified by experimental results. A rational analytical model is presented and used to evaluate the effective elastic modulus, shear modulus and degree of composite interaction of the panels to resist one-way bending. The experimental program was conducted in two phases to study the static and fatigue behavior of the panels. In the first phase a total of 730 sandwich beams were tested to evaluate the effect of different parameters on the fundamental behavior of the panel. The parameters considered include the pattern and density of through-thickness fiber insertions, the overall thickness of the panels, and the number of FRP plies in the face skins. The study indicates that the shear behavior and degree of composite interaction of the panels is sensitive to the configuration of the panel core. The second phase of the experimental program included testing of 24 additional sandwich panels to evaluate the fatigue behavior. The results of the experimental program indicate that the panels with stiffer cores generally exhibited a higher degree of degradation than panels with more flexible cores. The findings of this study indicate that the proposed panels represent a versatile construction system which can be configured to achieve the specific design demands for civil engineering infrastructure applications.

42 citations

Journal ArticleDOI
TL;DR: In this paper, a continuum damage model was proposed to increase the impact resistance of composite sandwich panels, which was interfaced with a commercial finite element package to model soft body impacts onto a minimum gauge honeycomb core sandwich.
Abstract: Because of high stiffness and strength to weight ratios, composite sandwiches are being used increasingly, especially in aerospace applications. The main drawback of sandwich components is their relatively low resistance to impact damage and the extent to which their strength is reduced under compressive loading after impact. As part of a wider study aimed at increasing the impact resistance of sandwich panels, a continuum damage model is proposed. The model developed describes the compressive behaviour of honeycombs made from materials that are prone to elastic buckling. The material behaviour in compression is described by a combination of three distinct constitutive models, namely elastic, elastic continuum damage and an inelastic strain accumulation model. This has been interfaced with a commercial finite element package to model soft body impacts onto a minimum gauge honeycomb core sandwich. Results from analysis are compared to experimental data and the correlation is found to be very good.

42 citations

Journal ArticleDOI
TL;DR: In this paper, a thin sandwich panel with an auxetic lattice core was fabricated by attaching the 3D LayWooden pyramidal truss structures to HDF face sheets with the PVCa adhesive, and the results showed that the mechanical properties of beams increase with an increasing inclination angle of struts and/or relative density of the core.

42 citations

Journal ArticleDOI
TL;DR: In this paper, the tendency of honeycomb composite structures to absorb and retain water was investigated, and an attempt was made to quantify the extent of water ingression in the Boeing 767 aircraft.
Abstract: When honeycomb composite structures are fabricated for the aerospace industry, they are designed to be closed to their operating environment for the life of the composite structure. However, once in service, this design can break down. Damage can set in motion a chain reaction of events that will ultimately degrade the mechanical integrity of the composite structure. Through thermographic analysis, the tendency of honeycomb composite structures to absorb and retain water was investigated, and an attempt was made to quantify the extent of water ingression in the Boeing 767 aircraft. Through thermographic analysis, the exterior honeycomb composite structures were found to contain less than 50 kg of water per plane. On average, over 90% of the water found on an aircraft was contained in five problematic parts, which included the outboard flap wedge, the nose landing gear doors, the main landing gear doors, the fixed upper wing panels, and the escape slide door. Kevlar lamina induced microcracking, skin porosity problems, and cracked potting compound were the root causes of water ingression and migration in these structures. Ultimately, this research will aid in the fundamental understanding and design of future honeycomb composite sandwich structures.

42 citations

Journal ArticleDOI
TL;DR: In this paper, a structural sandwich panel, consisting of a combination of concrete, insulation and connectors, was tested using a hot box apparatus to evaluate its thermal properties and energy efficiency.

42 citations


Network Information
Related Topics (5)
Fracture mechanics
58.3K papers, 1.3M citations
83% related
Fracture toughness
39.6K papers, 854.3K citations
79% related
Epoxy
93.1K papers, 1.1M citations
79% related
Finite element method
178.6K papers, 3M citations
79% related
Composite number
103.4K papers, 1.2M citations
78% related
Performance
Metrics
No. of papers in the topic in previous years
YearPapers
2023194
2022402
2021298
2020299
2019273
2018271