Plywood의 기계적 특성 및 파손 거동 분석에 관한 실험적 연구

• Published in: 大韓造船學會 論文集 Vol. 56; no. 4; pp. 335 - 342
• Main Authors: 차승주(Seung-Joo Cha), 김정대(Jeong-Dae Kim), 김정현(Jeong-Hyeon Kim), 오훈규(Hoon-Kyu Oh), 김용태(Yong-Tai Kim), 박성보(Seong-Bo Park), 이제명(Jae-Myung Lee)
• Format: Journal Article
• Language: Korean
• Published: 대한조선학회 2019
• Subjects: 조선공학; Fracture behavior(파손 거동); Liquefied natural gas(액화천연가스); Plywood(플라이우드); Mechanical properties(기계적 물성치)
• ISSN: 1225-1143; 2287-7355
• DOI: 10.3744/SNAK.2019.56.4.335

The objective of this study is to analyze the mechanical properties of plywood used as a thermal insulating material for LNG CCS (Liquefied Natural Gas, Cargo Containment System). It is created by bonding an odd number of parallel and perpendicular direction for preventing contraction and expansion of wood. Also plywood is widely used as LNG CCS insulating material because of its durability, light weight and high stiffness. Since LNG CCS is loaded with liquid cargo, the impact load by sloshing during operation and the wide temperature range (room temperature, low temperature, cryogenic temperature) exposed during loading, unloading should be considered. The thickness of the plywood which is used for the membrane type MARKIII was selected as the thickness of the test specimen. In this present study, plywood is analyzed by the fracture behavior and mechanical properties of plywood by temperature and grain direction. In addition, it is necessary to analyze the fracture shape and predict the fracture strain by using regression model because the critical load may cause cracks inside the tank, which may affect the leakage of cryogenic liquid.