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Article

Experimental Evaluation of Shear Properties of Lightweight PVC Core for Marine Application Using Digital Image Correlation System

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Department of Naval Architecture and Ocean Engineering, Faculty of Engineering, University of Rijeka, Vukovarska 58, 51000 Rijeka, Croatia
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Department of Structural Engineering and Technical Mechanics, Faculty of Civil Engineering, University of Rijeka, Radmile Matejčić 3, 51000 Rijeka, Croatia
*
Author to whom correspondence should be addressed.
Academic Editor: José A. F. O. Correia
J. Mar. Sci. Eng. 2022, 10(2), 280; https://doi.org/10.3390/jmse10020280
Received: 25 January 2022 / Revised: 11 February 2022 / Accepted: 16 February 2022 / Published: 17 February 2022
(This article belongs to the Section Ocean Engineering)
Sandwich structures are well-known and frequently used solutions in marine applications, especially when structural stiffness is required. An important part of the sandwich structure is the core, which usually carries shear loads. Therefore, choosing a reliable test method and knowing the exact shear properties of the particular core used in the structural design is beneficial for every engineer. Shear properties of the FlexyFoam M-55, a closed-cell, lightweight PVC foam with an apparent density of 60 kg/m3, have been investigated according to the ASTM C273 standard, using the tensile and compressive loading of metal supporting plates glued to the PVC foam sample. A digital image correlation (DIC) technique was used to monitor the crack propagation, and the appearance of secondary stresses at the foam-adhesive interface and strain field for the representative sample was presented. Displacement was measured using the testing machine sensors and compared to the measurements from the DIC technique. Specimen manufacturing details, surface preparation, and the gluing sequence were described, and measuring equipment and experiment settings were presented. Stress-strain curves have been presented and shear modulus and ultimate shear strength of the foam were compared for each test approach. The results were discussed and compared with the manufacturer’s data, as well as with foams of similar densities. The well-established approach in testing the core material was discussed, and recommendations were given to improve the testing procedure. View Full-Text
Keywords: sandwich core materials; shear properties; ASTM C273; digital image correlation; sandwich structure; marine industry; shipbuilding sandwich core materials; shear properties; ASTM C273; digital image correlation; sandwich structure; marine industry; shipbuilding
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MDPI and ACS Style

Bolf, D.; Zamarin, A.; Krolo, P.; Hadjina, M. Experimental Evaluation of Shear Properties of Lightweight PVC Core for Marine Application Using Digital Image Correlation System. J. Mar. Sci. Eng. 2022, 10, 280. https://doi.org/10.3390/jmse10020280

AMA Style

Bolf D, Zamarin A, Krolo P, Hadjina M. Experimental Evaluation of Shear Properties of Lightweight PVC Core for Marine Application Using Digital Image Correlation System. Journal of Marine Science and Engineering. 2022; 10(2):280. https://doi.org/10.3390/jmse10020280

Chicago/Turabian Style

Bolf, Davor, Albert Zamarin, Paulina Krolo, and Marko Hadjina. 2022. "Experimental Evaluation of Shear Properties of Lightweight PVC Core for Marine Application Using Digital Image Correlation System" Journal of Marine Science and Engineering 10, no. 2: 280. https://doi.org/10.3390/jmse10020280

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