Influence of Weathering on Post-Fracture Performance

In this paper, the post-fracture performance of weathered laminated glass is investigated; specifically regarding interlayer performance. Glass structures requiring post-fracture capacity often utilise full scale destructive tests to confirm post-fracture performance. These full-scale tests are always carried out on newly manufactured glass.

Although accelerated weathering tests have been conducted on laminated glass, these are often to investigate the visible deterioration of the interlayer only. Little is known about the deterioration in mechanical performance, particularly post-fracture mechanical performance.

In this work, the influence of weathering is investigated for small scale PVB laminates. Through crack tensile (TCT) tests were performed on weathered laminates and compared to newly manufactured specimens.

Three different weathering series were investigated; two artificially weathered series, in which specimens were exposed to accelerated ageing procedures; and one natural weathering series. The accelerated ageing techniques were defined by ISO 12543 for investigating exposure to high humidity and high temperature.

All weathering procedures were found to reduce the post-fracture performance of the laminates, when compared to the newly manufactured specimens. This work highlights the importance for research into the post-fracture performance of full-scale laminates