JOHN KLOSS
Vehicle Board in North East, PA
License number
Pennsylvania MV002612L
Category
Vehicle Board
Type
Vehicle Salesperson
Address
Address
North East, PA 16428
Professional information
Method And Apparatus For Measuring Crack Growth
US Patent:
4836029, Jun 6, 1989
Filed:
Mar 25, 1988
Appl. No.:
7/173341
Inventors:
Dennis P. Skala - Fairview PA
John W. Kloss - North East PA
John W. Kloss - North East PA
Assignee:
Lord Corporation - Erie PA
International Classification:
G01N 1908
US Classification:
73799
Abstract:
A method and apparatus for determining crack growth in an elastomer. A horizontally elongate elastomeric test specimen is cyclically stretched crosswise by upper and lower rigid plates contiguously attached to the long edges on both sides. The lengthwise growth of a crack induced by a small cut at one vertical edge of the specimen is determined by measuring the stretching force at each end. The lower plate is reciprocated by a hydraulic actuator relative to the upper plate. Two load cells measure the forces at each end of the specimen. With the use of a computer program and the relative forces measured by the load cells, the crack growth can be calculated.