The ship hull structure is composed of plates and stiffened panels. Estimating the maximum load-carrying capacity, or ultimate strength, these structural components fundamental. One main challenges nowadays implementation new materials technologies to enhance integrity, economy, safety environmentally friendly design ship’s structure. A solution may be represented by aluminium alloy honeycomb s...

Lightweight panels are of high relevance for various applications, such as automotive, aerospace, civil engineering, and achieve stiffnesses strengths at low self-weight. The sandwich principle is commonly used to manufacture the panels, although conventional materials reinforcement structures often limit design application in a wide range possible applications. reason this that lightweight fai...

This work describes the high-velocity impact behavior of doubly curved sandwich panels. The panels are manufactured using carbon/fiber epoxy composite face sheets, polyurethane foam core and 3D-printed PLA plastic cellular auxetic (re-entrant) honeycombs. High-velocity tests carried out by a single-stage air gas gun test machine. A spherical steel projectile with radius 5 mm is impacted to cent...

In this study, 4-mm-thick medium-density fiberboard (MDF) panels were heat-treated at 140 °C for 30 or 60 min and at 180 °C for 30 or 60 min. Then, 10-mm-thick lightweight honeycomb paperboards made from kraft paper (130 g/m, cell diameter of honeycomb, 14 mm; compression strength, 0.21 N/mm) were faced with the untreated and heat-treated MDF panels (thickness: 4 mm) using a two-component polyu...

A series of drop weight tests were conducted to evaluate the dynamic flatwise compression strength and flexural strength of sandwich panels with a novel core structure. This sandwich core material, known as Norcore, consists of interconnected cells in a unique configuration of truncated pyramid with sloping cell walls. Core materials made of thermoplastic including virgin Lexan, polycarbonate, ...