Abstract
Despite of laminate or sandwich composite materials structure, mechanical behavior can estimate by methods or analytical relations like laminates classical theory according factors just like mechanical properties, fiber percentage, and product methods and etc. but generally these estimates are far from experimental results. This paper investigates about influence of product methods and different cores on buckling and post buckling behaviors of sandwich panels. Each panel was built by to quit different product method, hand layup or vacuum bag infusion procedure with different core. To build the panels an effort had made to choice materials which have usage in marine industry, special for high speed boats. Sandwich panels have 150×450 mm2 dimensions and one simply support and one clamed support. After tests, numerical models results which drive from finite element software are compared with experimental data. The results represent that combined model is suitable for simulate buckling and post buckling behavior. After chosen the software model, different parameters were evaluated whom the link element has the most efficacy on numerical results.
Highlights
Marine industry is developing very fast just like other industries
Despite of laminate or sandwich composite materials structure, mechanical behavior can estimate by methods or analytical relations like laminates classical theory according factors just like mechanical properties, fiber percentage, and product methods and etc. but generally these estimates are far from experimental results
In this paper four groups of sandwich panels were investigated. These groups are: sandwich panels with P.V.C. core which built by hand layup and V.I.P. methods, sandwich panels with Balsa core built by hand layup and V.I.P. method, sandwich panels with Balsa core which built by hand layup method (Figure 1, Figure 2)
Summary
Marine industry is developing very fast just like other industries. Increasing marine transports, vessels speed ultimate etc. which engineers have to use optimum product methods and materials with lighter weight. Because of increasing size, speed and reducing ship’s body, engineers just think about different materials like composites with goals as mentioned. These materials are used in vessels (and surly in other marine structures) abundance as laminate or sandwich panel structures. On the other hand any different loads for example buoyancy force, waves and dead weight loads incur to vessel’s body, so vessel’s structure must be pass local and global analysis One of these category loads that occur in body is inplane loads. Despite of laminate or sandwich composite materials structure, mechanical behavior can estimate by methods or analytical relations like laminates classical theory according factors just like mechanical properties, fiber percentage, and product methods and etc. Studies that have done about this field, can debate in three branches: analytical studies, experimental studies and numerical studies
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