Numerical simulation for delamination involved with internal damage of CFRP ablator under rapid heating

2018 Fiscal Year Final Research Report

• Project/Area Number: 16K06891
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Multi-year Fund
• Section: 一般
• Research Field: Aerospace engineering
• Research Institution: Tokyo University of Science
• Principal Investigator: Koyanagi Jun 東京理科大学, 基礎工学部材料工学科, 准教授 (60386604)
• Research Collaborator: Fukuda Yasuhiro ; Shimba Kenta
• Project Period (FY): 2016-04-01 – 2019-03-31
• Keywords: CFRPアブレータ / 大気圏再突入 / 熱防御システム / 数値シミュレーション / 層間はく離 / マルチフィジックス連成解析

Outline of Final Research Achievements

By identifying the generation mechanism of delamination during rapid heating of CFRP ablator and carrying out numerical simulation, we have established a method that enables quantitative prediction of delamination generation. In the numerical analysis, multiphysics coupled analysis of heat conduction, chemical reaction such as carbonization, flow of generated gas, and separation generation by internal pressure was performed. As a result of examining the validity of the numerical simulation results using the arc wind tunnel owned by JAXA, good agreement was obtained between experiment and analysis. We learned the technology that can predict the occurrence of delamination in an unknown environment.

Free Research Field

航空宇宙工学

Academic Significance and Societal Importance of the Research Achievements

将来人類が地球外で生活するようになったときに，地球への帰還技術は極めて重要となる．本研究は，大気圏再突入時の熱防御材料の信頼性に関わる重要な研究である．本研究により最も汎用的に熱防御材料として使用されるであろうCFRPアブレータの損傷発生メカニズムを明らかにした．これを踏まえて熱防御システムを設計することで地球帰還への高信頼化に繋がる．人類の宇宙開発に重要な意味を持つ研究成果となる．