Effect of pressure distribution on energy dissipation in a mechanical lap joint

Song, Y; McFarland, DM; Bergman, LA; Vakakis, AF

dc.contributor.author	Song, Y	en
dc.contributor.author	McFarland, DM	en
dc.contributor.author	Bergman, LA	en
dc.contributor.author	Vakakis, AF	en
dc.date.accessioned	2014-03-01T01:22:16Z
dc.date.available	2014-03-01T01:22:16Z
dc.date.issued	2005	en
dc.identifier.issn	0001-1452	en
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/16503
dc.relation.uri	http://www.scopus.com/inward/record.url?eid=2-s2.0-13444263341&partnerID=40&md5=26e07acf11821f35b109b3cc24f7fe09	en
dc.subject.classification	Engineering, Aerospace	en
dc.subject.other	Coordinates	en
dc.subject.other	Interfacial models	en
dc.subject.other	Slip forces	en
dc.subject.other	Slip zones	en
dc.subject.other	Energy dissipation	en
dc.subject.other	Friction	en
dc.subject.other	Functions	en
dc.subject.other	Mathematical models	en
dc.subject.other	Parameter estimation	en
dc.subject.other	Pressure distribution	en
dc.subject.other	Vibrations (mechanical)	en
dc.subject.other	Joints (structural components)	en
dc.title	Effect of pressure distribution on energy dissipation in a mechanical lap joint	en
heal.type	journalArticle	en
heal.language	English	en
heal.publicationDate	2005	en
heal.abstract	Mechanical joints, such as the bolted shear lap joint considered here, are ubiquitous in engineered structures, which realize vibration damping as well as load transfer from them. However, the prediction of the energy-dissipation characteristics of such joints remains a challenging problem. A cubic relationship between energy dissipated and load magnitude is often assumed in classical joint dynamics, but experiments generally fail to support this assertion. In nearly all of the joint models examined previously, Coulomb friction and uniform pressure in the joint were assumed. Realizing that the Coulomb model may not adequately represent the actual dynamic friction in the slip region of the joint interface and that the actual interfacial pressure is likely nonuniformly distributed, we utilize a distributed-parameter joint model to investigate the constitutive relation and energy dissipation associated with a shear lap joint under longitudinal loading. Two nonuniform pressure distributions in a one-dimensional structure are considered. In both, under the Coulomb friction law, the energy dissipation resulting from microslip can be expressed as a power series starting from the third order of the magnitude of loading. It is shown that the exact cubic relation is valid only for the uniform pressure distribution. The distributed-parameter joint model presented herein can be represented by a parallel-series Iwan model. The distribution function of critical slip force in the Iwan model can be obtained analytically from the constitutive relation associated with the joint model; results are given for the cases of the normal traction specified as a power function of the spatial coordinate, and as a Gaussian function.	en
heal.publisher	AMER INST AERONAUT ASTRONAUT	en
heal.journalName	AIAA Journal	en
dc.identifier.isi	ISI:000226626400019	en
dc.identifier.volume	43	en
dc.identifier.issue	2	en
dc.identifier.spage	420	en
dc.identifier.epage	425	en