ISSN:
1013-9826
Source:
Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
Topics:
Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
Notes:
This study explored the feasibility and potential benefits provided by the addition ofthrough-the-thickness reinforcement to foam core sandwich structures. Through-the-thicknessstitching is proposed to increase the interlaminar strength and damage tolerance of compositesandwich structures. A low-cost, out-of-autoclave processing method was developed to producecomposite sandwich panels with carbon fiber face sheets, a closed-cell foam core, andthrough-the-thickness Kevlar stitching. The sandwich panels were stitched in a dry preform state,vacuum bagged, and infiltrated using Vacuum Assisted Resin Transfer Molding (VARTM)processing. For comparison purposes, unstitched sandwich panels were produced using the samematerials and manufacturing methodology. Five types of mechanical tests were performed: flexuraltesting, flatwise tensile and compression testing, core shear testing, and edgewise compressiontesting. Drop-weight impact testing followed by specimen sectioning was performed to characterizethe damage resistance of stitched sandwich panels. Compression after impact (CAI) testing wasperformed to evaluate the damage tolerance of the sandwich panels. Results show significantincreases in the flexural stiffness and strength, out-of-plane tensile strength, core shear strength,edgewise compression strength, and compression-after-impact strength of stitched sandwichstructures
Type of Medium:
Electronic Resource
URL:
http://www.tib-hannover.de/fulltexts/2011/0528/01/55/transtech_doi~10.4028%252Fwww.scientific.net%252FKEM.353-358.1443.pdf
