Tid: 19 januari 2004 kl 1515-1600

Plats : Seminarierummet 3733, Institutionen för matematik, KTH, Lindstedts väg 25, plan 7. Karta!

Föredragshållare: Tomas Torstensson.

Titel: Reliability in fatigue - On the choice of distributions in the load-strength model. (Examensarbete)

Sammanfattning: In this thesis the influence of the choice of distributions in the loadstrength model is considered. Accurate predictions of the failure probability is very useful when aiming at the most cost effective design of a component. Two distributions for load and strength are evaluated, the lognormal distribution and the Weibull distribution. From the load-strength model the failure probability can be determined which is the probability that the component in question fails within a specific time. The main conclusion is that the lognormal distribution should be used rather than the Weibull distribution, especially when the data available is limited. A possible way of updating the model with observed failure rates using Bayesian methods is also suggested.

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