Local effects in the vicinity of inserts in sandwich panels

Bozhevolnaya, Elena; Lyckegaard, Anders; Thomsen, Ole Thybo; Skvortsov, Vitaly

doi:10.1016/j.compositesb.2003.09.003

Cited by 42 publications

(22 citation statements)

References 5 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Further to this, an experimental investigation has confirmed the findings of the analytical model for sandwich beams [6]. The generalization of the model for the case of inserts in sandwich plates, and its verification my means of Finite Element Analysis, followed in [7]. A vast experimental program for the investigation of sandwich beams with conventional and modified core junctions under static and dynamic loading was carried out in [8,9].…”

Section: Introductionmentioning

confidence: 51%

Localized Effects across Core Junctions in Sandwich Beams Subjected to In-Plane and Out-of-Plane Loading

2005

Self Cite

View full text Add to dashboard Cite

The paper concerns local effects that occur across junctions between different cores in sandwich beams subjected to in-plane and out-of-plane loads. These local effects display themselves by a significant rise of the bending normal stresses in the faces of the sandwich near the core junctions. At the same time, an elevation of the transverse normal and shear stresses in the adjacent core parts is observed.The nature and intensity of the local effects is studied for sandwich beams loaded statically by axial (in-plane) and transverse (out-of-plane) forces. Two types of core junctions, namely a conventional butt junction and a reinforced butt junction, are investigated experimentally. The experimental data coincides perfectly with the numerical simulations performed using Finite Element Analysis.

show abstract

Section: Introductionmentioning

confidence: 51%

Localized Effects across Core Junctions in Sandwich Beams Subjected to In-Plane and Out-of-Plane Loading

2005

Self Cite

View full text Add to dashboard Cite

show abstract

“…There are several publications about insert design. Mostly, the dimensioning of inserts is obtained by analytical approaches that rely on the elastic shear properties of the honeycomb core [46,47]. A general method is also provided in the ESA Insert design book [48], where the effective strength of the core is 1.36 times the shear strength of the core in the W direction.…”

Section: Discussion Of Shear Allowables For Insert Sizingmentioning

confidence: 99%

Experimental and numerical analysis of the shear nonlinear behaviour of Nomex honeycomb core: Application to insert sizing

Rodríguez-Ramírez

Castanié

Bouvet

2018

Composite Structures

View full text Add to dashboard Cite

numerical analysis of the shear nonlinear behaviour of Nomex honeycomb core: Application to insert sizing. Composite Structures, Elsevier, 2018, vol. 193, pp. 121-139. 10.1016/j.compstruct.2018 A B S T R A C TThis work is a contribution to the understanding of the nonlinear shear behaviour caused by cell postbuckling in Nomex honeycomb cores. First, an experimental benchmark study was made of different designs for the shear testing of honeycomb cores. Then, several test specimens were fabricated and tested, a 3D DIC system being used to measure and record the displacements. An Artificial Neural Network (ANN) was also used to identify the onset of bucking and collapse of the cells. The influence of the overall boundary conditions of shear tests on the buckling of the cells is presented both experimentally and numerically. The reversibility and test procedure results suggest that it may be possible to allow the shear strength to be increased by up to 35% under certain conditions.

show abstract

“…A further experimental validation was subsequently performed in [5] and a generalization of the model for the case of the round inserts in sandwich plates, and its verification my means of Finite Element Analysis (FEA), followed in [6]. All these studies [4Y6] were devoted to the transverse loading of core junctions and let open a question about nature and intensity of the local phenomena in the vicinity of core junctions for other loading conditions.…”

Section: Introductionmentioning

confidence: 99%

Intensity of Local Effects at the Core Junctions in Sandwich Panels

Bozhevolnaya

Pantke²

2005

Appl Compos Mater

View full text Add to dashboard Cite

Local effects that occur in the vicinity of junctions between different cores in sandwich panels subjected to the in-plane axial force and bending moment are considered. These local effects manifest themselves in a rise of locally induced bending normal stresses in the sandwich faces and shear and normal stresses in the cores in the near vicinity of the core junctions. Intensity of the local effects is measured experimentally for a representative sandwich beam subjected to both types of loadings. The numerical simulations are performed using Finite Element Analysis, and they reveal significant rates of stress concentrations in the faces and cores adjacent to the core junctions. The intensity of the local effects is dependable on the geometry and elastic properties of the sandwich faces and a degree of dissimilarity of elastic properties of the adjoined cores.

show abstract

Local effects in the vicinity of inserts in sandwich panels

Cited by 42 publications

References 5 publications

Localized Effects across Core Junctions in Sandwich Beams Subjected to In-Plane and Out-of-Plane Loading

Localized Effects across Core Junctions in Sandwich Beams Subjected to In-Plane and Out-of-Plane Loading

Experimental and numerical analysis of the shear nonlinear behaviour of Nomex honeycomb core: Application to insert sizing

Intensity of Local Effects at the Core Junctions in Sandwich Panels

Contact Info

Product

Resources

About