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Abstract
Sandwich composites are a combination of two materials with different properties, when combined to form one material that has stronger properties and resistance than its constituent materials. This structure consists of a surface layer (skin) and a core (core). This study used fiberglass woven roving skin, core polylactid acid (PLA), and put together using polyester resin. One of the new technologies used today is 3D printing, which allows the manufacture of products with three-dimensional shapes. The research aims to produce new composite products by creating vertical and horizontally oriented variations of honeycomb cores, combined with PLA cores printed using 3D printing technology. The manufacturing process uses the vacuum bagging method because the process is simpler. The test is performed by flatwise compressive method to evaluate the resistance of the specimen to a given compression load. The test results showed that of the four vertically oriented honeycomb sandwich core composite specimens, the highest maximum compressive strength value was found in vertical honeycomb 3, reaching 61,310 MPa with a maximum load of 46434 N. Meanwhile, in the four horizontally oriented honeycomb sandwich core composite specimens, the highest maximum compressive strength value was found in horizontal honeycomb 2, reaching 15,265 MPa with a maximum load of 13603 N. From the test results It was concluded that the vertically oriented honeycomb sandwich core composite has superior structural strength