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  • Open Daily: 10am - 10pm
    Alley-side Pickup: 10am - 7pm

    3038 Hennepin Ave Minneapolis, MN
    612-822-4611

Open Daily: 10am - 10pm | Alley-side Pickup: 10am - 7pm
3038 Hennepin Ave Minneapolis, MN
612-822-4611
Analysis of the Mechanical Response of Impact Loaded Composite Sandwich Structures with Focus on Foam Core Shear Failure

Analysis of the Mechanical Response of Impact Loaded Composite Sandwich Structures with Focus on Foam Core Shear Failure

Block, Tim Berend

Paperback

Series: Science-Report Aus Dem Faserinstitut Bremen, Book 9

Technology & EngineeringGeneral Construction & Renovation

Currently unavailable to order

ISBN10: 3832538534
ISBN13: 9783832538538
Publisher: Logos Verlag Berlin
Published: Dec 20 2014
Pages: 237
Weight: 0.80
Height: 0.64 Width: 5.68 Depth: 8.04
Language: English
Sandwich structures are an economically and structurally efficient way of designing large integral composite parts. In the aerospace industry pre-impregnated face sheets and honeycomb core structures can be considered as industry standard while e.g. naval structures and wind turbine blades typically use vacuum infusion technology with polymer foam cores. Application of the less costly infusion technology in the aeronautical industry requires a thorough understanding of the damage tolerance including low velocity impact as a frequent source of damaging events. At low impact energies damage in composite foam core sandwich structures is limited to core crushing and local face sheet delaminations. Higher impact energies may initiate the competing failure modes face sheet rupture and core shear failure depending on impact, geometric and material parameters. Face sheet rupture leads to severe local damage with typically good visibility, while core shear failure leads to cracks and rear face sheet debonding of the foam core with less visibility. This work investigates the low velocity impact response of sandwich structures with carbon fiber reinforced plastic (CFRP) face sheets and a polymeric foam core using experiments at room temperature and at -55 Grad Celsius. An analytically derived failure mode map is presented as a simple tool for design guidelines while the explicit finite element method is applied for a more detailed description of the sandwich impact process. Both models are used to analyze the impact response and describe relevant sensitivity parameters of sandwich structures.

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