Investigations of the Fracture Mechanism of Carbon/Epoxy Composites by AE Signal Analyses

• KOMAI Kenjiro

• Minoshima Kohji

• SHIBUTANI Toyoshige

抄録

Although the acoustic emission (AE) method provides useful information on the operating fracture processes of materials, a synthesized evaluation of AE signals using several AE parameters is necessary for composite materials, because AE signals arise from various fracture processes. In this paper, the relationships between several AE parameters and AE original sources were investigated, and fracture mechanisms of carbon fiber reinforced plastics (CFRP) are discussed in terms of observations of fracture surfaces and internal damage of the laminates by a scanning electron microscope (SEM) and a scanning acoustic microscope (SAM), respectively. Synthesized AE signal wave analyses, including the distributions of AE amplitude, AE-event duration, and counts/duration (corresponding to frequency), give us useful and powerful information to analyze the complicated fracture mechanisms of composite materials with. The fracture in tensile tests and cyclic tensile tests of unidirectionally reinforced carbon/epoxy composites goes through fiber/matrix interface debonding and fiber breakage.

収録刊行物

• JSME international journal. Ser. 1, Solid mechanics, strength of materials

  JSME international journal. Ser. 1, Solid mechanics, strength of materials 34 (3), 381-388, 1991

  一般社団法人 日本機械学会

キーワード

• Acoustic Emission
• Composite Material
• CFRP
• Tensile Test
• Cyclic Tensile Test
• Acoustic Microscope
• SEM

詳細情報

• CRID: 1390282680408417152
• NII論文ID: 110002348029
• NII書誌ID: AA10680585
• DOI: 10.1299/jsmea1988.34.3_381
• ISSN: 09148809
• Web Site: https://www.jstage.jst.go.jp/article/jsmea1988/34/3/34_3_381/_pdf
• 本文言語コード: en
• データソース種別:
  • JaLC
  • Crossref
  • CiNii Articles
• 抄録ライセンスフラグ: 使用不可