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Constraining the shear strain in viscoelastic materials and utlization of the “incompressible” properties for damping treatment in hybrid joint interface module to improve their effect for vibration control in machining
KTH, Skolan för industriell teknik och management (ITM), Industriell produktion, Maskin- och processteknologi.ORCID-id: 0000-0002-4677-7005
KTH, Skolan för industriell teknik och management (ITM), Industriell produktion, Maskin- och processteknologi.ORCID-id: 0000-0002-5960-2159
2016 (engelsk)Inngår i: The International Journal of Advanced Manufacturing Technology, ISSN 0268-3768, E-ISSN 1433-3015, Vol. 83, nr 5, s. 1079-1097Artikkel i tidsskrift (Fagfellevurdert) Published
Abstract [en]

A hybrid joint interface module (HJIM) was developed using viscoelastic materials’ (VEM) “incompressible” property. The HJIM composes VEM layers compressed by screws. Its static stiffness and damping had been characterized by inverse receptance method. The analysis result showed that its static stiffness increases by nearly 50 % with increasing compression preload without compromising its loss factor. A comparison study of HJIM with a viscoelastic material joint interface module (VJIM) revealed that the change of the screws mechanical contact conditions affected the HJIM’s stiffness. Compression preload by fastening the screws, however, did not significantly affect the damping property of the HJIM. On the contrary to shear pre-strain, compression preload did not affect the VEM’s properties shown by studying the VJIM case. A workpiece was studied while fixed on the HJIM. Varying compression preload affected the stiffness of HJIM and that resulted in increased shear strain in VEM for certain modes while decreased shear strain in VEM for other modes. The affected shear strain in VEM altered the vibrational strain energy distribution and changed the receptance amplitude of different modes. In addition to apply the VEM where it is significantly strained, the analysis revealed that constraining the shear strain in VEM resulted in reduced receptance amplitude for different modes. The changes of receptance will further affect the vibration conditions in machining.

sted, utgiver, år, opplag, sider
2016. Vol. 83, nr 5, s. 1079-1097
Emneord [en]
Machining; Vibration; Damping; Viscoelastic materials; Inverse receptance coupling; Hybrid joint interface module;
HSV kategori
Forskningsprogram
Industriell produktion
Identifikatorer
URN: urn:nbn:se:kth:diva-176865DOI: 10.1007/s00170-015-7487-2ISI: 000371324500035Scopus ID: 2-s2.0-84959146038OAI: oai:DiVA.org:kth-176865DiVA, id: diva2:868439
Prosjekter
PoPJIM
Forskningsfinansiär
EU, FP7, Seventh Framework Programme, 260048
Merknad

QC 20160407

Tilgjengelig fra: 2015-11-10 Laget: 2015-11-10 Sist oppdatert: 2017-12-01bibliografisk kontrollert
Inngår i avhandling
1. High dynamic stiffness nano-structured composites for vibration control: A Study of applications in joint interfaces and machining systems
Åpne denne publikasjonen i ny fane eller vindu >>High dynamic stiffness nano-structured composites for vibration control: A Study of applications in joint interfaces and machining systems
2015 (engelsk)Doktoravhandling, med artikler (Annet vitenskapelig)
Abstract [en]

Vibration control requires high dynamic stiffness in mechanical structures for a reliable performance under extreme conditions. Dynamic stiffness composes the parameters of stiffness (K) and damping (η) that are usually in a trade-off relationship. This thesis study aims to break the trade-off relationship.

After identifying the underlying mechanism of damping in composite materials and joint interfaces, this thesis studies the deposition technique and physical characteristics of nano-structured HDS (high dynamic stiffness) composite thick-layer coatings. The HDS composite were created by enlarging the internal grain boundary surface area through reduced grain size in nano scale (≤ 40 nm). The deposition process utilizes a PECVD (Plasma Enhanced Chemical Vapour Deposition) method combined with the HiPIMS (High Power Impulse Magnetron Sputtering) technology. The HDS composite exhibited significantly higher surface hardness and higher elastic modulus compared to Poly(methyl methacrylate) (PMMA), yet similar damping property. The HDS composites successfully realized vibration control of cutting tools while applied in their clamping interfaces.

Compression preload at essential joint interfaces was found to play a major role in stability of cutting processes and a method was provided for characterizing joint interface properties directly on assembled structures. The detailed analysis of a build-up structure showed that the vibrational mode energy is shifted by varying the joint interface’s compression preload. In a build-up structure, the location shift of vibration mode’s strain energy affects the dynamic responses together with the stiffness and damping properties of joint interfaces.

The thesis demonstrates that it is possible to achieve high stiffness and high damping simultaneously in materials and structures. Analysis of the vibrational strain energy distribution was found essential for the success of vibration control.

sted, utgiver, år, opplag, sider
Stockholm: KTH Royal Institute of Technology, 2015. s. ix, 71
Serie
TRITA-IIP, ISSN 1650-1888
Emneord
Vibration control, High dynamic stiffness, Metal matrix composite, Nano structures, Plasma enhanced chemical vapour deposition (PECVD), High power impulse magnetron sputtering (HiPIMS), Adiabatic, Machining, Regenerative tool chatter
HSV kategori
Forskningsprogram
Industriell produktion
Identifikatorer
urn:nbn:se:kth:diva-176869 (URN)978-91-7595-740-1 (ISBN)
Disputas
2015-12-01, M311, Brinellvägen 68, KTH, Stockholm, 10:00 (engelsk)
Opponent
Veileder
Forskningsfinansiär
EU, FP7, Seventh Framework Programme, 608800EU, FP7, Seventh Framework Programme, 260048VINNOVA, E!4329VINNOVA, HydroMod
Tilgjengelig fra: 2015-11-11 Laget: 2015-11-10 Sist oppdatert: 2015-11-11bibliografisk kontrollert

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