Residual Strength Evaluation for Aerospace Composite Structures with Large Notch Damage in MSC.Nastran SOL 700 Advanced Composite based on Alphastar …

2013

Large notch damage usually consists of failed or completely severed stiffeners or spars, or chord with failed or completely severed attached skin or web. Large notch damage results from unknown damage sources so the damage event is immediately obvious to the flight crew. The airplane must be capable of successfully completing a flight with such damage. The determinate accidental damage event is to ensure a balanced design approach in which the damage size in linked to the structural configuration. The criterion that is generally used, called the “two bay crack criterion,” states that the damage tolerant composite structure should sustain the regulatory loads with damage in skin like sharp s…