Maybe you need to expand your horizons a bit and change your way of thinking... Think of virtually everything we encounter in our daily lives and apply the idea of stress and strain to them instead of thinking of stress and strain and thinking of an example. I say this because stress and strain calculations are instrumental in the creation and engineering of everything from house hold appliances to food wrapping, car chassis, space crafts, mouse traps... these are just some examples where stress strain calculations would need to be made in order to make a cost efficient product.