Development of the Delamination Evaluation Parameters (I)

• Published in: Journal of mechanical science and technology pp. 1932 - 1940
• Main Authors: Cheol-Woong Kim, Sam-Hong Song, Dong-Joon Oh
• Format: Journal Article
• Language: Korean
• Published: 대한기계학회 01.11.2004
• Subjects: 기계공학
• ISSN: 1738-494X; 1976-3824

Although the previous researches evaluated the fatigue behavior of Al/GFRP laminates using the traditional fracture mechanism, their researches were not sufficient to do it : the damage zone of Al/GFRP laminates was occurred at the delamination zone instead of the crack-metallic damages. Thus, previous researches were not applicable to the fatigue behavior of Al/GFRP laminates. The major purpose of this study was to evaluate delamination behavior using the relationship between crack length (a) and delamination width (b) in Al/GFRP laminate. The details of investigation were as follows : 1) Relationship between crack length (a) and delamination width (b), 2) Relationship between delamination aspect ratio (b/a) and delamination area rate ((AD)N/(AD)All), 3) The effect of delamination aspect ratio (b/a) on the delamination shape factor (fS) and the delamination growth rate (dAD/da). As results, it was known that the delamination aspect ratio (b/a) was decreased and the delamination area rate ((AD)N/(AD)All) was increased as the normalized crack size (a/W) was increased. And, the delamination shape factors (fS) of the ellipse-II (fS3) was greater than of the ellipse-I (fS2) but that of the triangle (fS1) was less than of the ellipse-I (fS2). KCI Citation Count: 1