A Simple Experiment To Demonstrate the Effects of Cracks on Materials Strength

• Frederick C. Sauls ^[1]
  1. [1] King's College

     King's College

     City of Wilkes-Barre, Estados Unidos

     
• Localización: Journal of chemical education, ISSN 0021-9584, Vol. 88, Nº 5, 2011, págs. 607-608
• Idioma: inglés
• Texto completo no disponible (Saber más ...)
• Resumen

  • 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.