Development of effective delamination analysis model for steel and concrete structures reinforced with composite materials

2021 Fiscal Year Final Research Report

• Project/Area Number: 19K04586
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Multi-year Fund
• Section: 一般
• Review Section: Basic Section 22020:Structure engineering and earthquake engineering-related
• Research Institution: Hakodate National College of Technology
• Principal Investigator: Watanabe Chikara 函館工業高等専門学校, 社会基盤工学科, 教授 (90249714)
• Project Period (FY): 2019-04-01 – 2022-03-31
• Keywords: Region-wise ZIG-ZAG理論 / 改良ZIG-ZAG理論 / Layer-wise理論 / 異方性積層板 / サンドイッチ板 / 三次元応力 / 面外応力

Outline of Final Research Achievements

In this study, a region-wise ZIG-ZAG theory was developed by integrating layer-wise theory in order to apply the improved ZIG-ZAG theory to delamination analysis and sandwich structures. In this region-wise ZIG-ZAG theory, the laminated structure is divided into several regions in the thickness direction, and the boundaries of the regions and the interior of the regions have degrees of freedom. To efficiently represent ZIG-ZAG displacements inside the regions, a higher-order improved ZIG-ZAG theory is used. As a result, the number of unknown degrees of freedom required for analysis is considerably less than that of layer-wise theory, and accurate structural analysis of steel and concrete structures reinforced with composite materials is possible.

Free Research Field

応用力学

Academic Significance and Societal Importance of the Research Achievements

本研究では，剥離解析や複合材料と等方性材料からなるサンドイッチ構造へ改良ZIG-ZAG理論を適用するために，Layer-wise理論を融合させたRegion-wise ZIG-ZAG理論を開発した。このRegion-wise ZIG-ZAG理論ではLayer-wise理論に比べて未知自由度数が少なくなり，複合材料で補強された鋼・コンクリート構造の精密な構造解析を効果的に計算できる。