Hot bond fracture stress

The hot bond fracture stress Morse potential energy function by [1]... 

If the interfacial bond between fibres and resin is broken, whether by mechanical stress, hot water immersion or thermal cychng, the fibres will not be able to support the load adequately. As a consequence, there can be localized matrix cracking and the cracks in the matrix eventually propagate by a sequence of events which ultimately leads to large scale fibre fracture or to delamination, or both. 

When the stress at the crack tip is sufficient to overcome the strength of the chemical bonds there, fracture occurs. Long, sharp cracks produce higher stresses. See fracture mechanics. Ingot Head Tile. See hot topping tile. Ingot Mould. See mould brick mould... 

---