Characterization of the deformation and rupture behaviour of silicone elastomers for airbag applications

Andreas Johann Schwarz

Characterization of the deformation and rupture behaviour of silicone elastomers for airbag applications

Andreas Johann Schwarz

Chair of Materials Science and Testing of Polymers (210)

Research output: Thesis › Diploma Thesis

Abstract

In this scientific work on hand two apparently similar types of liquid silicone rubber (LSR) for membrane applications were being characterized mechanically and compared. For a first, basic characterization of the uncured materials, Shore A hardness, uniaxial tensile and compression tests were performed. Using an adapted proposition, a friction-free stress-strain diagram was evaluated for the compression behaviour. A one-camera experimental set-up in combination with bubble inflation tests was used to analyse equi-biaxial data. Based on the mechanical tests hyperelastic material laws were determined using a fitting procedure in a finite element code. For both materials a short-term postcuring at high temperatures was assessed with the aim of stabilizing their mechanical properties. The effects of an additional thermal curing at 90° C over a time period of 3000 hours were investigated. The results of both the mechanical haracterization and the thermal curing showed a significant difference between either materials selected.

Translated title of the contribution	Charakterisierung des Deformations- und Bruchverhaltens von Silikon-Elastomeren für Airbaganwendungen
Original language	English
Qualification	Dipl.-Ing.
Supervisors/Advisors	Lang, Reinhold, Supervisor (internal) González, Manuel, Co-Supervisor (external), External person
Award date	7 Apr 2006
Publication status	Published - 2006

Bibliographical note

no embargo

Keywords

silicone elastomer mechanical characterization finite elements material law postcuring

Cite this

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title = "Characterization of the deformation and rupture behaviour of silicone elastomers for airbag applications",

abstract = "In this scientific work on hand two apparently similar types of liquid silicone rubber (LSR) for membrane applications were being characterized mechanically and compared. For a first, basic characterization of the uncured materials, Shore A hardness, uniaxial tensile and compression tests were performed. Using an adapted proposition, a friction-free stress-strain diagram was evaluated for the compression behaviour. A one-camera experimental set-up in combination with bubble inflation tests was used to analyse equi-biaxial data. Based on the mechanical tests hyperelastic material laws were determined using a fitting procedure in a finite element code. For both materials a short-term postcuring at high temperatures was assessed with the aim of stabilizing their mechanical properties. The effects of an additional thermal curing at 90° C over a time period of 3000 hours were investigated. The results of both the mechanical haracterization and the thermal curing showed a significant difference between either materials selected.",

keywords = "Silikon Elastomer mechanische Charakterisierung finite Elemente Materialgesetz Nachbehandlung, silicone elastomer mechanical characterization finite elements material law postcuring",

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note = "no embargo",

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TY - THES

T1 - Characterization of the deformation and rupture behaviour of silicone elastomers for airbag applications

AU - Schwarz, Andreas Johann

N1 - no embargo

PY - 2006

Y1 - 2006

N2 - In this scientific work on hand two apparently similar types of liquid silicone rubber (LSR) for membrane applications were being characterized mechanically and compared. For a first, basic characterization of the uncured materials, Shore A hardness, uniaxial tensile and compression tests were performed. Using an adapted proposition, a friction-free stress-strain diagram was evaluated for the compression behaviour. A one-camera experimental set-up in combination with bubble inflation tests was used to analyse equi-biaxial data. Based on the mechanical tests hyperelastic material laws were determined using a fitting procedure in a finite element code. For both materials a short-term postcuring at high temperatures was assessed with the aim of stabilizing their mechanical properties. The effects of an additional thermal curing at 90° C over a time period of 3000 hours were investigated. The results of both the mechanical haracterization and the thermal curing showed a significant difference between either materials selected.

AB - In this scientific work on hand two apparently similar types of liquid silicone rubber (LSR) for membrane applications were being characterized mechanically and compared. For a first, basic characterization of the uncured materials, Shore A hardness, uniaxial tensile and compression tests were performed. Using an adapted proposition, a friction-free stress-strain diagram was evaluated for the compression behaviour. A one-camera experimental set-up in combination with bubble inflation tests was used to analyse equi-biaxial data. Based on the mechanical tests hyperelastic material laws were determined using a fitting procedure in a finite element code. For both materials a short-term postcuring at high temperatures was assessed with the aim of stabilizing their mechanical properties. The effects of an additional thermal curing at 90° C over a time period of 3000 hours were investigated. The results of both the mechanical haracterization and the thermal curing showed a significant difference between either materials selected.

KW - Silikon Elastomer mechanische Charakterisierung finite Elemente Materialgesetz Nachbehandlung

KW - silicone elastomer mechanical characterization finite elements material law postcuring

M3 - Diploma Thesis

ER -