Plastic Failure Analysis Expert performs a failure analysis on a plastic “lawn chair” that collapsed when someone sat in it. The right arm separated from the seat. Upper left is a photograph of the subject chair with the separated leg. Fractography, top center photograph, indicates that the failure was progressive (i.e. a fatigue failure). Examination […]
High Pressure Bottle Failure Analysis Tests
Glass failure analysis requires looking at failed bottles and determining the cause of failure. The failure analysis procedure includes carefully examining the crack pattern and the failure origin. It also helps to have failures with known causes to confirm the conclusions. In this case, bottles were purposely broken using hydraulic pressure. Their performance was documented […]
Glass Expert Performs Beer Bottle Failure Analysis
Glass failure analysis expert witness performs a failure analysis on a broken beer bottle. According to the witness t, e bottle “explosion” occured as the bottle was being set down. The glass expert examined the failed bottle and the failure analysis showed that the bottle failure resulted from damage to tbe knurl on the bottom […]
California Glass Expert Discusses Nickel Sulfide in Tempered Glass
In glass failure analysis one uses evidence such as the attached photograph to demonstrate that a nickel sulfide particle can initiate tempered glass failure. The NiS particle is at the center of expanding Wallner lines. The Wallner lines are used by the glass failure analysis expert to track the direction of the crack growth. In […]
Nickel Sulfide Particles in Tempered Glass
Glass failure analysis expert witness performs a failure analysis on a tempered glass window. The failure was initiated by a nickel sulfide, NiS particle. The glass failure analysis expert was able to retrieve both halves of the failure origin. One side of the failure origin contained the protruding NiS particle. On the other side of […]
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