Evaluation of Low-Velocity Impact Properties for Stitched Foam-Core Polyurethane Sandwich Structural Panel


Composite sandwich structures with a variety of core materials are increasingly utilized for wide range of structural applications. This paper presents experimental and numerical investigation on low-velocity impact response of sandwich composite panels composed of stitched foam core and E-glass fiber/Polyurethane (PU) facesheets. The samples were fabricated using low-cost vacuum assisted resin transfer molding (VARTM) process. Low velocity impact response of the sandwich panels was investigated under four different impact energy levels (10J, 15J, 20J, and 30J) using a Dynatup drop tower Instron impact machine. Based on the load and energy histories, parameters including maximum load, penetration depth, and total energy absorbed have been investigated under the four different impact energy levels listed above. A three-dimensional dynamic finite element model was developed for the stitched sandwich structures under low velocity impact.

Meeting Name

Composites and Advanced Materials Expo 2015, CAMX 2015 (2015: Oct. 27-29, Dallas, TX)


Mechanical and Aerospace Engineering

Keywords and Phrases

Coremaking; Finite element method; Foams; Sandwich structures; Vacuum applications; Velocity; Composite sandwich structure; Impact energy levels; Low velocity impact; Numerical investigations; Sandwich composite panels; Structural applications; Three-dimensional dynamics; Vacuum-assisted resin transfer molding process; Resin transfer molding

Document Type

Article - Conference proceedings

Document Version


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© 2015 The Composites and Advanced Materials Expo (CAMX), All rights reserved.

Publication Date

01 Oct 2015

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