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ERIC Number: EJ936766
Record Type: Journal
Publication Date: 2011-May
Pages: 2
Abstractor: As Provided
Reference Count: 5
ISSN: ISSN-0021-9584
A Simple Experiment to Demonstrate the Effects of Cracks on Materials Strength
Sauls, Frederick C.
Journal of Chemical Education, v88 n5 p607-608 May 2011
A simple in-class experiment was designed to expose students to an aspect of materials science dealing with defects. Students break a series of paper strips to gauge the breaking strength. A precut transverse "crack" weakens the paper strip by a surprising amount. Adding a precut "crack stopper" greatly reduces the effect of the original "crack". The observations are explained by the stress lines in the paper strips. (Contains 2 figures.)
Division of Chemical Education, Inc and ACS Publications Division of the American Chemical Society. 1155 Sixteenth Street NW, Washington, DC 20036. Tel: 800-227-5558; Tel: 202-872-4600; e-mail:; Web site:
Publication Type: Journal Articles; Reports - Descriptive
Education Level: High Schools; Higher Education
Audience: N/A
Language: English
Sponsor: N/A
Authoring Institution: N/A