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Investigating Glass Behavior under Extreme Temperatures

CSEF · 2005 Structural Capability & Strength of Materials (Junior Division Only)

Christopher Ruh, Brandon Taylor · Washington Academic Middle School, Sanger

Overview

Objectives/Goals To determine at what temperature glass is strongest and weakest. Methods/Materials We are using 12X12 double strength (DS) glass sheets, heating glass with heat lamp, cooling glass in snow and control at room temperature. We inserted the glass into a wooden frame to simulate a framed window. We dropped a 5oz lead weight from a 40 degree angle into the framed glass. We are investigating at what time of year glass is strongest and weakest. Results We found that the heated glass shattered easier than the cooled glass. The cooled glass broke in a more uniformed manner. Conclusions/Discussion After completing our investigation, we found that our hypothesis was incorrect. The hot glass cracked and shattered easier and did not have any uniform pattern to it, the cooled glass had more uniformed cracks, they were larger, straighter and cleaner looking.

Summary statement

How glass reacts to extreme temperatures

Help received

Friend who works for a glass company, Mr. Matt Imfeld from Anlin Industries

Competition history

  • CSEF 2005 Structural Capability & Strength of Materials (Junior Division Only) · Entry J1820

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