Load and Strain at Failure:  Measuring Effectiveness of Sutures


Class: BE210
Group: 101_B3
Members:

Noel Camacho
Christian Fuchs
Andrea Lo
Kaned Suviwattanachai

Date: April 2005

Powerpoint Presentation
Full Text

The main objective of the experiment is to evaluate the relationship between the force applied and displacement experienced at the point where the sutures hold the chicken skin together.  While this was somewhat explored in experiments three and five, this specific experiment seeks to optimize the use of the instruments to facilitate more accurate readings.  The aim of using the Instron 4444 is to have constant loading rather than discrete loading, while the aim of using the digital camera is to measure displacement over a smaller area with greater accuracy. In doing so, the experimenters will gain insight about the difference between grip to grip displacement and gap distance.
    The experimental objective in using rubber sutures is to compare displacement at failure of rubber alone and displacement at failure of rubber with stitches, in order to isolate the effect of the sutures. Also with the sutured rubber, the experimenters will be able to establish which method to use for determining the force-displacement relationship – that is, whether to define a specific displacement as failure or to use the yield point and find the displacement at that point.