Collapse mechanisms of sandwich beams with composite faces and a foam core, loaded in three-point bending. Part I: analytical models and minimum weight design

By C. Steeves, Norman A. Fleck. 2004

300 citations recorded by the source corpus.

Abstract Analytical predictions are made for the three-point bending collapse strength of sandwich beams with composite faces and polymer foam cores. Failure is by the competing modes of face sheet microbuckling, plastic shear of the core, and face sheet indentation beneath the loading rollers. Particular attention is paid to the development of an indentation model for elastic faces and an elastic–plastic core. Failure mechanism maps have been constructed to reveal the operative collapse mode as a function of geometry of sandwich beam, and minimum weight designs have been obtained as a function of an appropriate structural load index. It is shown that the optimal designs for composite–polymer foam sandwich beams are of comparable weight to sandwich beams with metallic faces and a metallic foam core.

Subfields: Mechanical Engineering, Mechanics of Materials

View Paper: https://www.semanticscholar.org/paper/8e916a58d60bd66c9b1a81e209229b422630b4be

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In Mechanical Engineering

1. Guoxing Lu
2. D. Ruan
3. Zhihua Wang
4. Feng Zhu
5. C. Steeves
6. Norman A. Fleck
7. V. Deshpande
8. H. Wadley

In Mechanics of Materials

1. Guoxing Lu
2. D. Ruan
3. Zhihua Wang
4. Feng Zhu
5. C. Steeves
6. Norman A. Fleck
7. H. Wadley
8. V. Deshpande

Citations in the corpus

• Collapse mechanisms of sandwich beams with composite faces and a foam core, loaded in three-point bending. Part II: experimental investigation and numerical modelling (2004, methodology): “A more sophisticated version of this model assumes that the core behaves in an elastic-ideally plastic manner; see Steeves and Fleck [8] for full details.”
• Plastic Deformation, Failure and Energy Absorption of Sandwich Structures with Metallic Cellular Cores (2010, background): “E-glass/Epoxy or Carbon/Epoxy) [17–26] or metallic skins [27–33] and a polymeric/metallic foam core.”
• Cork agglomerates as an ideal core material in lightweight structures (2010, background): “Sandwich beams are also being increasingly used in applications requiring high bending stiffness and strength combined with low weight [12].”