Tag Archives: deformation

When Worlds Collide


 Model Description: This is a simple demonstration of the phases of a collision for central impact.  Two squeeze balls are used to show the phases. This demonstration should take 3-5 minutes. Engineering Principle: Two objects in a head-on or rear-end collision (“central impact”) will deform as they collide.  At the time of maximum deformation, they […]

Balloons!!: A demonstration of thin-walled pressure vessels


 Overview This is a simple demonstration of the basic principals underlying the behavior of thin-walled pressure vessels (TWPVs).  A balloon or balloons are used to show that hoop stresses are twice as high as longitudinal stresses in cylindrical pressure vessels. Principle The basic derivation for TWPV behavior states that for a cylindrical pressure vessel   […]