4/12/2021· Failure Analysis
Glass Failure Analysis: Glass Oven Dish Failure
By: Dr. Thomas Read
The annealed borosilicate glass pie plate failed as a result of “thermal shock”. There were multiple origins for the failure, and these all initiated at damage sites on the bottom of the Pyrex baking dish. It appears that the bottom of the pie plate was convex. Thus, setting the dish down and moving it on hard (abrasive) surfaces such as tile or granite counters created bottom “rim” damage.
2/17/2023· Failure Analysis
Design Defect Failure Analysis of Water Shut Off Valve
By: Dr. Thomas Read
When this type of valve is open a rubber seal around the valve stem prevents leaking. In this case, the poly acetate stem deteriorated due to the presence of hot chlorinated water This allowed water to leak out. Over time the leak rate increased.
8/7/2012· Failure Analysis
Failure Analysis: Metal Fatigue of Automatic Machinery - Wafer Test Station
By: Dr. Thomas Read
During normal operation, the arm on an automatic wafer test station failed. Root cause failure analysis determined that the drive shaft on the right angle gear motor used to raise and lower the manipulator arm had failed first.
