Improved stress prediction in adhesive bonded optical components

摘要

Adhesives are widely used in optomechanical structures for bonding optical components to their mounts. The mainadvantage of using adhesives is the excellent strength to weight ratio. Adhesive bonding is seen as a desirable joiningtechnique as it allows for greater flexibility in design. A disadvantage of adhesives however is the limited dimensionalstability and loadability. To design stable optical mounts, accurate prediction of stresses and deformation is thereforeneeded.Adhesives show strong temperature and loading history dependent behavior. Viscoelastic material models are needed foraccurate prediction of stresses and strains in bonded joints. However, representative material data for adhesives isdifficult to find.In this research, an experimental framework is build up to determine relevant mechanical properties of adhesives forimproving stress and deformation prediction. This paper shows the results of the characterization experiments andmodeling techniques. Also the implementation of material models in finite element code is briefly discussed. Theobtained models are used in the mount design in the EUCLID and TROPOMI programs as described in “Ultra stable isostaticbonded optical mount design for harsh environments, J.A.C.M Pijnenburg et al” (this conference).© (2012) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.