... values for the stress intensity factors at point s on the crack front nearest the patch and at point d down the bore of the hole are given in Table 9. 15 f Advances in the bonded composite repair o ... result, in three of the patches considered a hole was left so as not to interfere with the draining of the wing In the other three patches, varying amounts of the hole were covered In one case, one ... desirable to reduce K, to below the fatigue threshold limit of the wing skin Let us now consider the effect that the difference between the coefficients of thermal expansion of the boron patch and the...