Analysis of the dissipative mechanisms in metal-elastomer interfaces

J. Neggers; J.P.M. Hoefnagels; O. Sluis, van der; O. Sedaghat; M.G.D. Geers

doi:10.1016/j.engfracmech.2015.06.056

Analysis of the dissipative mechanisms in metal-elastomer interfaces

J. Neggers, J.P.M. Hoefnagels, O. Sluis, van der, O. Sedaghat, M.G.D. Geers

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Abstract

Remarkable toughnesses have been reported for metal-elastomer interfaces in stretchable electronics and attributed to surface roughness-induced fibrillation. Interestingly, this micro-mechanism was also observed for PDMS, known for its hyperelastic and thus non-dissipative material behavior. Here, the energy dissipation origin is elucidated by a thorough multi-scale experimental analysis of PDMS-copper delamination, for two distinct modemixities and surface toughnesses. The fracture process zone was observed by in situ and post-mortem optical and electron microscopy, and compared to cohesive-zone finite elements simulations: The PDMS deformation is indeed (predominantly) reversible and most energy is dissipated by release of elastically stored energy upon fibril fracture.

Original language	English
Pages (from-to)	412-424
Journal	Engineering Fracture Mechanics
Volume	149
DOIs	https://doi.org/10.1016/j.engfracmech.2015.06.056
Publication status	Published - 17 Jul 2015

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title = "Analysis of the dissipative mechanisms in metal-elastomer interfaces",

abstract = "Remarkable toughnesses have been reported for metal-elastomer interfaces in stretchable electronics and attributed to surface roughness-induced fibrillation. Interestingly, this micro-mechanism was also observed for PDMS, known for its hyperelastic and thus non-dissipative material behavior. Here, the energy dissipation origin is elucidated by a thorough multi-scale experimental analysis of PDMS-copper delamination, for two distinct modemixities and surface toughnesses. The fracture process zone was observed by in situ and post-mortem optical and electron microscopy, and compared to cohesive-zone finite elements simulations: The PDMS deformation is indeed (predominantly) reversible and most energy is dissipated by release of elastically stored energy upon fibril fracture.",

author = "J. Neggers and J.P.M. Hoefnagels and {Sluis, van der}, O. and O. Sedaghat and M.G.D. Geers",

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T1 - Analysis of the dissipative mechanisms in metal-elastomer interfaces

AU - Neggers, J.

AU - Hoefnagels, J.P.M.

AU - Sluis, van der, O.

AU - Sedaghat, O.

AU - Geers, M.G.D.

PY - 2015/7/17

Y1 - 2015/7/17

N2 - Remarkable toughnesses have been reported for metal-elastomer interfaces in stretchable electronics and attributed to surface roughness-induced fibrillation. Interestingly, this micro-mechanism was also observed for PDMS, known for its hyperelastic and thus non-dissipative material behavior. Here, the energy dissipation origin is elucidated by a thorough multi-scale experimental analysis of PDMS-copper delamination, for two distinct modemixities and surface toughnesses. The fracture process zone was observed by in situ and post-mortem optical and electron microscopy, and compared to cohesive-zone finite elements simulations: The PDMS deformation is indeed (predominantly) reversible and most energy is dissipated by release of elastically stored energy upon fibril fracture.

AB - Remarkable toughnesses have been reported for metal-elastomer interfaces in stretchable electronics and attributed to surface roughness-induced fibrillation. Interestingly, this micro-mechanism was also observed for PDMS, known for its hyperelastic and thus non-dissipative material behavior. Here, the energy dissipation origin is elucidated by a thorough multi-scale experimental analysis of PDMS-copper delamination, for two distinct modemixities and surface toughnesses. The fracture process zone was observed by in situ and post-mortem optical and electron microscopy, and compared to cohesive-zone finite elements simulations: The PDMS deformation is indeed (predominantly) reversible and most energy is dissipated by release of elastically stored energy upon fibril fracture.

U2 - 10.1016/j.engfracmech.2015.06.056

DO - 10.1016/j.engfracmech.2015.06.056

M3 - Article

SN - 0013-7944

VL - 149

SP - 412

EP - 424

JO - Engineering Fracture Mechanics

JF - Engineering Fracture Mechanics

ER -

Analysis of the dissipative mechanisms in metal-elastomer interfaces

Abstract

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