• Khairi, Supar
• Ahmad, Hilton

Abstract

Multi-bolted joints are designed as joining technique to provide efficiency in assembling different structure parts; however the ability of neighboringbolts to transfer by-pass stress susceptible to net-tension failure occurrence. More recently, strength prediction works in composite structures arecarried out within finite element framework to utilize advantage of advanced computing technology. Current work implemented a three-dimensionalExtended Finite Element Method (XFEM) framework of multi-bolted joints configurations in variations lay-ups to determine failure load, validatedagainst experimental datasets. Other testing parameters investigated comprised of different bolts configurations and plate geometries. Visual trackingfrom XFEM contour found that crack initiation and propagations are consistent with experimental observations. Better agreements were found in nonstaggeredconfigurations with largest discrepancy of approximately 30%, mostly gives less than 15%. Besides, combination of cross-ply and thickerplates promotes better predictions due to larger repetitive plies as current work implemented smeared-out properties within its constitutive model.

Topics

• laser emission spectroscopy
• crack
• strength
• composite
• positron annihilation lifetime spectroscopy
• Photoacoustic spectroscopy
• joining
• ultraviolet photoelectron spectroscopy
• woven