Re: The plastic Boeing 787
Despite desperate comments to the contrary, a ding or ramp rash damage will not lead to catastrophic failure thanks to the structure and composition of the material used - unlike single layer metal structures, a crack in the outer layers of a composite structure will not expand appreciably nor deepen. Additionally, the carbon fibre composite system Boeing will use for the 787 is to be over engineered for strength and longevity of the airframe.
Repairs would be 2 phase if needed - traditional bolt on patch using common techniques will do until bonding (if needed) can be accomplished in an appropriately equipped shop at a later time.
What does concern me regarding the greater use of these materials in aircraft construction is the moisture issue and freeze/thaw cycles. According to at least one highly degreed expert in the field, this could be a serious problem for aging aircraft (specifically the A300 series) and (down the road) - the new 787 if it is not addressed in manufacture or maintenance implementation.
No squeeky allegations about this choice bit of data - but then rocks and glass houses and all............