Use of probabilistic techniques to calibrate design rules for overlap joints
conference paper
To apply design rules for overlap joints in practice, it is necessary to agree upon the partial safety for to be used. Values recommended in guidelines vary between 1,5 up to 10 or more. Since there is no conformation about the value to be used, a designer has to rely on his own judgement. Probabilistic techniues on the other hand, open the possibility to quantify the reliability of a design fule properly.
Within this paper the possibilities of probabilistic techniques are illustrated for a simple model to predict the ultimate strength for the static load case. The prediction model assumes that the absolute maximum strength for a lap joint is when the whole of the adhesive layer is at the shear yield strength. The calibration of the matching partial safety factor is done with use of probabilistic techniques.
With use of a sophisticated material model for adhesives Monte Carlo simulation are made to determine the strength distribution of overlap joints. The effects of the scatter of various parameters like material properties and temperature, can be quantified in this way. In this paper the results of simulations for a toughened 2-component epoxy adhesive are presented for overlap joints under various conditions. Finally the values of the partial safety factor are determined for this example
Within this paper the possibilities of probabilistic techniques are illustrated for a simple model to predict the ultimate strength for the static load case. The prediction model assumes that the absolute maximum strength for a lap joint is when the whole of the adhesive layer is at the shear yield strength. The calibration of the matching partial safety factor is done with use of probabilistic techniques.
With use of a sophisticated material model for adhesives Monte Carlo simulation are made to determine the strength distribution of overlap joints. The effects of the scatter of various parameters like material properties and temperature, can be quantified in this way. In this paper the results of simulations for a toughened 2-component epoxy adhesive are presented for overlap joints under various conditions. Finally the values of the partial safety factor are determined for this example
TNO Identifier
516286
Source title
Adhesion '05. Ninth International Conference on the Science and Technology of Adhesion and Adhesives, 7-9 September, 2005, St. Catherine's College, University of Oxford, UK
Pages
65-68
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