Bonded bimaterial ring under compressive load

作者：Budzik Michal K^*; Jensen Henrik Myhre

来源：Proceedings of the Institution of Mechanical Engineers - Part L: Journal of Materials: Design and Applications , 2014, 228(2): 100-108.

DOI：10.1177/1464420713512281

• Adhesive joints
• Brazilian disc
• mode mixity
• bimaterial corner
• finite element analysis
• crack onset

A bonded ring test is proposed to study crack onset under pure and mixed mode conditions. In the existing centre-cracked Brazilian disc configuration, introduction of a central crack may be arbitrary and can easily lead to initial asymmetric crack configuration. Moreover, the crack front geometry is, in general, unknown which may result in serious consequences on crack onset and fracture parameters. In the present work, a bonded ring loaded in compression was investigated numerically and experimentally. Two bimaterial singular points were introduced between the half discs and the adhesive providing privileged crack onset location - controllable during specimen fabrication. Three types of specimens were analysed using digital image correlation and finite element techniques: homogenous poly(methyl methacrylate), bonded poly(methyl methacrylate) and bonded poly(methyl methacrylate) to stainless steel rings. A satisfying agreement between experimental and numerical approaches was found enabling more complex analysis in future. Such test configuration can be of interest for crack onset studies and estimation of fracture parameters under mixed mode I/II loading conditions.

• 出版日期2014-4