Weibull Distribution on Tensile Fatigue Strength of Unidirectional CFRP at Room Temperature

• 資料種別: 記事
• タイトル: Weibull Distribution on Tensile Fatigue Strength of Unidirectional CFRP at Room Temperature
• 著者・編者: Yasushi MIYANO; Masayuki NAKADA; Yoko MORISAWA; Yuto TAKEUCHI; Shinsaku KUROSE
• 著者標目: Yasushi MIYANO; Masayuki NAKADA; Yoko MORISAWA; Yuto TAKEUCHI; Shinsaku KUROSE
• タイトル（掲載誌）: Materials system
• 巻号年月日等（掲載誌）: 43:2026
• 掲載巻: 43
• 掲載ページ: 11-17
• 掲載年月日（W3CDTF）: 2026
• ISSN（掲載誌）: 2435-1520
• ISSN-L（掲載誌）: 2435-1520
• 出版事項（掲載誌）: Hakusan : Materials System Research Laboratory
• 出版地（国名コード）: JP
• 本文の言語コード: eng
• 件名標目: Polymer-matrix composites; Creep; Fatigue; Statistical properties
• NDLC: ZM16
• 対象利用者: 一般
• 所蔵機関: 国立国会図書館
• 請求記号: Z63-D600
• 連携機関・データベース: 国立国会図書館 : 国立国会図書館雑誌記事索引; https://ndlsearch.ndl.go.jp
• 書誌ID（NDLBibID）: 034652736; http://id.ndl.go.jp/bib/034652736
• 整理区分コード: 632

• 要約等: An integrated accelerated testing method (Integrated ATM) has been proposed by the authors as a method for evaluating the strength and durability of CFRP and its structures. The strength scatter in the Integrated ATM formulation is expressed by a Weibull distribution, and its shape parameter is independent of the type of load (static, creep, or fatigue) and the environment (time or temperature). Christensen's viscoelastic crack kinetics law, the scientific basis for the Integrated ATM formulation, covers static and creep strength but not fatigue strength. In this study, we used resin-impregnated CFRP strands as unidirectional CFRP and performed numerous fatigue tests at various stress levels to compare the scatter in fatigue strength with the scatter in static strength. The Weibull distributions for both strengths were found to be nearly identical, demonstrating experimentally that the Integrated ATM formulation can be extended to the fatigue strength of unidirectional CFRP. Furthermore, we clarified the characteristics of the scatter in the S-N curve, which shows the relationship between fatigue strength and number of cycles to failure for unidirectional CFRP.
• DOI: 10.34401/materialssystem.43.0_11
• オンライン閲覧公開範囲: インターネット公開
• 連携機関・データベース: 科学技術振興機構 : J-STAGE; http://www.jstage.jst.go.jp

• 要約等: An integrated accelerated testing method (Integrated ATM) has been proposed by the authors as a method for evaluating the strength and durability of CFRP and its structures. The strength scatter in the Integrated ATM formulation is expressed by a Weibull distribution, and its shape parameter is independent of the type of load (static, creep, or fatigue) and the environment (time or temperature). Christensen's viscoelastic crack kinetics law, the scientific basis for the Integrated ATM formulation, covers static and creep strength but not fatigue strength. In this study, we used resin-impregnated CFRP strands as unidirectional CFRP and performed numerous fatigue tests at various stress levels to compare the scatter in fatigue strength with the scatter in static strength. The Weibull distributions for both strengths were found to be nearly identical, demonstrating experimentally that the Integrated ATM formulation can be extended to the fatigue strength of unidirectional CFRP. Furthermore, we clarified the characteristics of the scatter in the S-N curve, which shows the relationship between fatigue strength and number of cycles to failure for unidirectional CFRP.
• DOI: 10.34401/materialssystem.43.0_11; https://doi.org/10.34401/materialssystem.43.0_11
• 関連情報（URI）: http://id.ndl.go.jp/bib/034652736; https://ndlsearch.ndl.go.jp/books/R000000004-I034652736
• 連携機関・データベース: 国立情報学研究所 : CiNii Research; https://cir.nii.ac.jp/
• 提供元機関・データベース: Japan Link Center; https://japanlinkcenter.org/top; 雑誌記事索引データベース; https://ndlsearch.ndl.go.jp
• 書誌ID（NDLBibID）: 034652736; http://id.ndl.go.jp/bib/034652736