Study on the Collapse of Pin-Reinforced Foam Sandwich Panel Cores

Rice, M. C.; Fleischer, C. A.; Zupan, Marc

doi:10.1007/s11340-006-7103-3

Cited by 55 publications

(34 citation statements)

References 13 publications

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“…Besides, the tensile plate shear tests provided the shear modulus data of 4.3 MPa (warp) and 7.8 MPa (weft), and thus the core shear buckling loads were determined as 1.7×10 3 N (warp) and 3.1×10 3 N (weft). In the edgewise test the failure loads were about 970 N (warp) and 1500 N (weft), less than Euler buckling and core shear buckling loads [16,17], which indicated that no such failure modes happened.…”

Section: Stress-strain Curves and Fracture Morphologies Of Mono-spacementioning

confidence: 89%

Effect of Structure on the Mechanical Behaviors of Three-Dimensional Spacer Fabric Composites

Wang

Zhang

et al. 2008

Appl Compos Mater

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Three-dimensional (3-D) spacer fabric composite is a newly developed sandwich structure, the reinforcement of which is integrally woven by advanced textile technique. Two facesheets of 3-D spacer fabric are connected by continuous fibers, named pile in the core, providing excellent properties like outstanding integrity, debonding resistance, light weight, good designability and so on. Usually the 3-D spacer fabric composite without extra reinforcement is a kind of core material. In comparison with the facesheet reinforced spacer fabric composite, here the composite without additional weaves is called monospacer fabric composite. In this paper, two kinds of mono-spacer fabric composites with integrated hollow cores have been developed, one with 8-shaped piles and the other with corrugated piles. The mechanical characteristics and the damage modes of these monospacer fabric composites under different load conditions have been investigated. Besides, effects of pile height, pile distribution density and pile structure on the composites mechanical performances were analyzed. It is shown that the mechanical performances of mono-spacer fabric composites can be widely adapted to the respective requirements through the choice of the structural factors.

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Section: Stress-strain Curves and Fracture Morphologies Of Mono-spacementioning

confidence: 89%

Effect of Structure on the Mechanical Behaviors of Three-Dimensional Spacer Fabric Composites

Wang

Zhang

et al. 2008

Appl Compos Mater

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“…5 of Cartie and Fleck (2003) and Fig. 4 of Rice et al (2006). ''Prediction 1" denotes the predictions given in Marasco et al (2006), while ''Prediction 2" denotes the predictions obtained by the current model.…”

Section: Plastic Collapsementioning

confidence: 99%

“…Meanwhile, with the pin volume fraction fixed, the pin diameter had negligible influence over the size range studied. Further work by Rice et al (2006) mainly concerned about the collapse mechanism of sandwich panels having Rohacell foam cores reinforced by composite pins subjected to 3-point bending. Three failure modes were considered: indentation, core shearing and face sheet failure.…”

Section: Introductionmentioning

confidence: 99%

Analytical modeling and finite element simulation of the plastic collapse of sandwich beams with pin-reinforced foam cores

Liu

Deng

2008

International Journal of Solids and Structures

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a b s t r a c tAnalytical predictions are presented for the plastic collapse strength of lightweight sandwich beams having pin-reinforced foam cores that are loaded in 3-point bending. Both polymer and aluminum foam cores are considered, whilst the facesheet and the pins are made of either composite or metal. Four different failure modes are account for: metal facesheet yield or composite facesheet microbuckling, facesheet wrinkling, plastic shear of the core, and facesheet indentation beneath the loading rollers. A micromechanics-based model is developed and combined with the homogenization approach to calculate the effective properties of pin-reinforced foam cores. To calculate the elastic buckling strength of pin reinforcements, the pin-reinforced foam core is treated as assemblies of simply supported columns resting upon an elastic foundation. Minimum mass design of the sandwich is then obtained as a function of the prescribed structural load index, subjected to the constraint that none of the above failure modes occurs. Collapse mechanism maps are constructed and compared with the failure maps of foam-cored sandwich beams without pin reinforcements. Finite element simulations are carried out to verify the analytical model and to study the performance and failure mechanisms of the sandwich subject to loading types other than 3-point bending. The results demonstrate that the weaker the foam is, the more optimal the pin-reinforced foam core becomes, and that sandwich beams with pin-reinforced polymer foam cores are structurally more efficient than foam-or trusscored sandwich beams.

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“…The most common interfacial toughening methodology's applied for sandwich structures encompasses Z-pinning (Rice et al 2006;Cartie and Fleck 2003;Marasco et al 2006) and stitching (Potluri et al 2003;Lascoup et al 2006), refers to sewing the face and core mutually by Z-directional or through-thickness reinforcements. This method increased the compression properties of sandwich panel by more than 100% (Nanayakkara et al 2011).…”

Section: Introductionmentioning

confidence: 99%

Polyester Pinning Effect on Flexural and Vibrational Characteristics of Foam Filled Honeycomb Sandwich Panels

Jayaram¹,

Nagarajan²,

Kumar³

2017

Lat. Am. j. solids struct.

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Polyester pins are incorporated in polyurethane foam filled honeycomb core sandwich panel to increase the interfacial strength between the faces and core in order to improve the performance of sandwich structures. Foam filled Honeycomb Sandwich panel (FHS) and Pin incorporated Foam filled Honeycomb sandwich panels (PFHS) were developed. The developed sandwich panels are tested for flexural and vibration characteristics. The influence of strain rates on flexural behaviour of sandwich panels were also evaluated. The material used for face sheets and pins are same, ends of pin act as chemically cross linked polyester joint at the interfaces of faces and core in addition to the adhesive area. This modification had effectually increased the interfacial strength thereby increased the flexural and damping properties of panels significantly. Moreover, increasing the pin diameter has a larger effect, whereas, the strain rate had a moderate influence on the failure load of both types of sandwich panels. The investigation brings to light a novel pin incorporated foam filled honeycomb sandwich panels that can be used for various applications.

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Study on the Collapse of Pin-Reinforced Foam Sandwich Panel Cores

Cited by 55 publications

References 13 publications

Effect of Structure on the Mechanical Behaviors of Three-Dimensional Spacer Fabric Composites

Effect of Structure on the Mechanical Behaviors of Three-Dimensional Spacer Fabric Composites

Analytical modeling and finite element simulation of the plastic collapse of sandwich beams with pin-reinforced foam cores

Polyester Pinning Effect on Flexural and Vibrational Characteristics of Foam Filled Honeycomb Sandwich Panels

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