Mechanism of Compressive strength of carbon fiber composite laminates with a notch

• Project/Area Number: 15K06607
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Multi-year Fund
• Section: 一般
• Research Field: Aerospace engineering
• Research Institution: Sophia University
• Principal Investigator: SUEMASU Hiroshi 上智大学, 理工学部, 教授 (20134661)
• Co-Investigator(Kenkyū-buntansha): 長嶋 利夫 上智大学, 理工学部, 教授 (10338436)
• Project Period (FY): 2015-04-01 – 2018-03-31
• Project Status: Completed (Fiscal Year 2017)
• Budget Amount: ¥4,940,000 (Direct Cost: ¥3,800,000、Indirect Cost: ¥1,140,000); Fiscal Year 2017: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000); Fiscal Year 2016: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000); Fiscal Year 2015: ¥1,950,000 (Direct Cost: ¥1,500,000、Indirect Cost: ¥450,000)
• Keywords: 炭素繊維強化複合材料 / 圧縮 / 積層板 / 強度 / せん断不安定 / 圧縮強度 / 応力集中 / 不安定 / CFRP積層板 / 圧縮破壊 / 体積効果 / 破壊進展 / 破壊進展条件

Outline of Final Research Achievements

Theoretical, Analytical and experimental studies were done to understand possible mechanisms of practical compressive strength of carbon fiber reinforced composite (CFRP) laminates. The theoretical solution is derived to see the stress and displacement field based on the complex stress function method. Finite element analysis considering the damage accumulation and non-elastic constitutive relation was performed. Specimens having an elliptical hole or edge notch were tested to evaluate the effect of the stress concentration and dimensions of notch edge radius on the compressive strength.

Research Products

• [Journal Article] バイパス力とベアリング力を同時に受けるCFRP積層板のファスナー継手の破壊挙動 (2018)
  • Author(s): 末益博志、森本哲也、山本直
  • Journal Title: 日本複合材料学会誌 Volume: 45
  • NAID: 130007749903
  • Peer Reviewed
• [Journal Article] ランダム配向不連続繊維強化複合材料の弾性率の確率特性と体積効果 (2018)
  • Author(s): 末益博志, 松尾剛
  • Journal Title: 日本複合材料学会誌 Volume: 45
  • NAID: 130007652512
  • Peer Reviewed
• [Presentation] 複合材料積層板の衝撃損傷と圧縮強度劣化（CAI） (2018)
  • Author(s): 末益博志
  • Organizer: 第9回日本複合材料会議
  • Invited
• [Presentation] 切り欠きを有する炭素繊維強化複合材料積層板の圧縮破壊メカニズム (2017)
  • Author(s): 家永諭、上法雄樹、末益博志
  • Organizer: 第8回 日本複合材料会議
  • Place of Presentation: 東京大学、東京
  • Year and Date: 2017-03-16
• [Presentation] Analytical study on impact damage of composite laminates (2017)
  • Author(s): H Suemasu
  • Organizer: 15th European-Japanese Meeting on Composite Materials
  • Invited
• [Presentation] Analytical study on instability of multiple delaminations of axisymmetric composite laminates subjected to transverse loading (2017)
  • Author(s): H Suemasu
  • Organizer: 2nd South East Asia-Japan Conference on Composite materials
• [Presentation] 切り欠きを有するCFRP積層板の圧縮特性 (2016)
  • Author(s): 家永諭、末益博志
  • Organizer: 第58回 構造強度に関する講演会
  • Place of Presentation: 北海道大学、札幌
  • Year and Date: 2016-08-03
• [Presentation] 切り欠きを有するCFRP積層板の圧縮特性 (2016)
  • Author(s): 末益、家永
  • Organizer: 第58回構造強度に関する講演会
  • Place of Presentation: 北海道大学、
  • Year and Date: 2016-08-03
• [Presentation] Effects of Stress Concentration on Compressive Strength of CFRP Laminates (2016)
  • Author(s): Hiroshi Suemasu, Satoshi Ienaga, Yuki Joho
  • Organizer: 17th US-Japan Conference on Composite Materials
  • Place of Presentation: 北海道大学、札幌市
  • Year and Date: 2016-08-01
• [Presentation] Effects of Stress Concentration on Compressive Strength of CFRP (2016)
  • Author(s): Hiroshi SUEMASU, Satoshi IENAGA, Yuki JOHO
  • Organizer: US-Japan 2016
  • Place of Presentation: University of Hokkaido
  • Year and Date: 2016-08-01
  • Int'l Joint Research