Department of Energy Argonne National Laboratory Office of Science NEWTON's Homepage NEWTON's Homepage
NEWTON, Ask A Scientist!
NEWTON Home Page NEWTON Teachers Visit Our Archives Ask A Question How To Ask A Question Question of the Week Our Expert Scientists Volunteer at NEWTON! Frequently Asked Questions Referencing NEWTON About NEWTON About Ask A Scientist Education At Argonne Windshields and Thermal Effects
Name: Steve M.
Status: Educator
Age: 40s
Location: N/A
Country: N/A
Date: February 2004


Question:
We are investigating the effects of heat and cold temperatures on windshield glass. Any suggestions where to find out what causes cracks to form and expand in different temperatures?



Replies:
This is a difficult experimental investigation because "Detroit" sees to it that it occurs as infrequently as possible for obvious reasons, so you do not have a large sample size to start with. Underlying all windshield failures is the formation of stresses in the glass. These can often be detected by viewing the glass between two polarizers (available at science supply sources). The presence of stresses does not predict failure, but failure is usually preceded by stresses set up in the windshield glass.

Vince Calder



Click here to return to the Engineering Archives

NEWTON is an electronic community for Science, Math, and Computer Science K-12 Educators, sponsored and operated by Argonne National Laboratory's Educational Programs, Andrew Skipor, Ph.D., Head of Educational Programs.

For assistance with NEWTON contact a System Operator (help@newton.dep.anl.gov), or at Argonne's Educational Programs

NEWTON AND ASK A SCIENTIST
Educational Programs
Building 360
9700 S. Cass Ave.
Argonne, Illinois
60439-4845, USA
Update: June 2012
Weclome To Newton

Argonne National Laboratory