Structural Response of Marine Sandwich Panels to Uniform Pressure Loading
Abstract
Deflection and strain responses of six marine sandwich panels to uniform pressure loading are investigated. Panels are full scale typical of those found in a 40' high performance deep-vee monohull. Three combinations of matrix-reinforcement are used in the panel faces: bi-axial (0 deg - 90 deg) E- glass in a fire retardent vinyl ester resin (DERAKANE 510A), bi-axial and double bias (+ or - 45 deg) Kevlar in DERAKANE 510A, and bi-axial and double bias Kevlar with an elastomer modified vinyl ester resin (DERAKANE 8084). Polyvinyl chloride foam AIREX is the core material. A panel test mechanism applies uniform pressure to panels 90 in. wide by 120 in. long. The central test section is 30 by 60 in. and is isolated by one panel span to simulate in situ boundary conditions. Two pressure loading rates (static and cyclic) are employed allowing examination of viscoelastic effects. A material and mechanical characterization of the sandwich panel lower faces is conducted. Membrane behavior is not evident on a per cycle basis, yet its effect can be seen over successive cycles. The non-linearity and hysteresis diminish with repeated loading. After relatively few cycles, the deflection and strain responses become linear, the rate- normalized bending stiffness lessens, and the overall panel response approaches that recorded during static tests.
Document Details
- Document Type
- Technical Report
- Publication Date
- Jun 01, 1990
- Accession Number
- ADA227038
Entities
People
- J. R. Huss
Organizations
- Massachusetts Institute of Technology