Please use this identifier to cite or link to this item:
|Title:||Shearographic and holographic assessment of defective laminates with bond-lines of different elasticities||Authors:||Shang, H.M.
|Issue Date:||Jul-1995||Citation:||Shang, H.M., Tham, L.M., Chau, F.S. (1995-07). Shearographic and holographic assessment of defective laminates with bond-lines of different elasticities. Journal of Engineering Materials and Technology, Transactions of the ASME 117 (3) : 322-329. ScholarBank@NUS Repository.||Abstract:||While defects in laminated plates are readily revealed using double-exposure shearography and holography, when an incremental vacuum pressure is applied between the exposures, the apparent defect size, measured from the boundary of the perturbed fringes, may over-estimate the actual defect size depending on the elasticity of the bond-line. In this paper, the perturbed fringes were described by a mathematical model derived from the theory of thin plates supported by a Winkler type elastic foundation which takes into consideration the elasticity of the bond-line. An iterative technique is subsequently presented for estimating the size and depth of the defect from the fringe pattern without the need to pre-determine the current elasticity of the bond-line. Laminates with a thick and highly elastic bond-line, found in foam-adhesive bonded metal laminates, and those with a thin and brittle bond-line, found in multi-layered glassfibre reinforced plastic plates, were tested. Results have shown that the defects in these laminates were accurately assessed.||Source Title:||Journal of Engineering Materials and Technology, Transactions of the ASME||URI:||http://scholarbank.nus.edu.sg/handle/10635/58689||ISSN:||00944289|
|Appears in Collections:||Staff Publications|
Show full item record
Files in This Item:
There are no files associated with this item.
checked on Oct 14, 2021
Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.