The Advanced Composites Consortium is a US Government/Industry partnership supporting
technologies to enable timeline and cost reduction in the development of certified composite …

The present report follows on the cohesive fatigue damage model methodology proposed in
NASA-TP-2018-219838. In that report, an empirical function describing the incremental …

Delaminations are a concern for the structural integrity of fibre composite structures. The
decisive material parameter for delaminations is fracture toughness. Structures usually have …

Composite structural aircraft parts are certified using analysis (closed form/semi-empirical)
supported by extensive testing guided by the Building Block Approach (BBA) framework [1] …

In fibre composite structures, bonded joints offer mechanical advantages over bolted joints
and can thus contribute to lightweight design. Nevertheless, in aircraft constructions most …

Skin-stiffener separation in stiffened composite panels consists of a complex interaction
between multiple scales of progressive damage and failure mechanisms. This work used a …

Experiments have shown that the critical energy release rate (ERR) can vary as a function of
the delamination in-plane propagation direction, relative to the bounding plies, and out-of …

Blind predictions were conducted to validate a discrete crack methodology based on the
Floating Node Method to simulate matrix-crack/delamination interaction. The main novel …

A methodology is presented to investigate and improve the strength and damage tolerance
of stiffened composite panels used in aerospace structures subjected to postbuckling …

Aeronautical composite stiffened structures have the capability to carry loads deep into
postbuckling, yet they are typically designed to operate below the buckling load to avoid …