Consistent approach to onset theory

Onset Theory (previously known as Strain Invariant Failure Theory) is a physics-based composite failure criterion attempting to predict failure at the level of constituents rather than for a homogenized ply. Applying Onset Theory correctly requires a number of steps. As a starting point for other researchers, a consistent approach is...

A multi-surface interface model for sequentially linear methods to analyse masonry structures

In the finite element modelling of masonry structures, the micro-modelling technique of differentiating the continuum into a linear elastic bulk, and interfaces representing non-linear joints is common. However, this approach of simulating cracking-crushing-shearing failure possibilities in interfaces, typical of damage in masonry, also poses...

Onset Theory (Strain Invariant Failure Theory): Consistent Approach and Automation

Many composite failure criteria suffer from serious flaws related to prediction accuracy and the number of tests required to apply them, as found for example during the World Wide Failure Exercises. In 2001, Jon Gosse of Boeing Phantom Works developed a new criterion for matrix failure. Initially known as Strain Invariant Failure Theory (SIFT),...