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Shear and elastic moduli of Poplar wood affected by glue coverage deficiency of lamination in a vibration based nondestructive approach | ||
| تحقیقات علوم چوب و کاغذ ایران | ||
| Article 5, Volume 29, WINTER 4 - Serial Number 49, February 2015, Pages 550-560 PDF (683.58 K) | ||
| Document Type: Research Paper | ||
| DOI: 10.22092/ijwpr.2014.8458 | ||
| Authors | ||
| Ehsan Haji rafiriha1; Mehran Roohnia* 2; Ahmad Jahan latibari3; Ajang Tajidini4 | ||
| 1M.Sc., Wood and Paper Science and Technology, Karaj Branch, Islamic Azad University, Karaj, Iran | ||
| 2Associate Professor, Wood and Paper Science and Technology, Karaj Branch, Islamic Azad University, Karaj, Iran, | ||
| 3Professor, Wood and Paper Science and Technology, Karaj Branch, Islamic Azad University, Karaj, Iran | ||
| 4Associate Professor, Wood and Paper Science and Technology, Karaj Branch, Islamic Azad University, Karaj, Iran | ||
| Abstract | ||
| The effect of lamination and adhesive coverage rate in layered products made from Poplar wood was studied The effect of lamination and adhesive coverage rate in layered products made from Poplar wood was studied by non-destructive free vibration test. 120 samples with nominal dimensions of 2.5×2.5×45 cm without any obvious deficiencies were selected and free flexural vibration in free-free bars were performed for testing them. Samples were longitudinal cut in three thinner tangential layers and jointed together again using Poly Vinyl Acetate glue. The specimens were divided into four groups according to adhesive coverage rates, which one group was fully glued and 3 groups were carrying some glue deficiencies in different rates. Manipulated samples were tried again in above mentioned test. Results indicated that shear moduli compare to modulus of elasticity is a more sensitive parameter to evaluate glue efficiency in laminated beams but concerns remained due to blind points in flexural vibration nondestructive method. | ||
| Keywords | ||
| flexural vibration; glue deficiency; longitudinal vibration; Modulus of elasticity; Shear modulus | ||
| References | ||
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