Identification of Delamination in Multilayered Composites

7th International Conference on Advanced Materials and Structures

Tufisi, C.^1 ; Gillich, G.R.^1 ; Vasile, O.^2 ; Korka, Z.I.^1 ; Hamat, C.O.^1

Eftimie Murgu University of Resita, Romania^1

Politehnica University of Bucuresti, Romania^2

关键词: Bending vibrations;    Damage position;    Different frequency;    Dynamic structural response;    Multi-layered composites;    Transversal cracks;    Vibrational behavior;    Vibrational response;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/416/1/012045/pdf
DOI  :  10.1088/1757-899X/416/1/012045

来源: IOP

【 摘 要 】

The paper presents the study of the vibrational behavior of laminated composites whose sheets are debonded but still in contact. The aim is to show that the delamination occurring in a given region of the structure produces different frequency shifts for the different bending vibration modes, dependent on the position and extent of the delamination. The vibrational response that comprises the frequency shifts of several modes constitute the delamination signature and can be therefore be used as a patter in damage detection procedures. The paper presents a finite element analysis comprising composite structures with transversal cracks followed by different debondings which highlight the dynamic structural response individualized by damage position and severity.