Digital control for material testing

Abstract

As a result of proposed changes in the standard specifications for performing the conventional tension test and evaluating the data obtained, a semiautomatic testing machine has been developed by incorporating a digital system to provide control of load, strain rate or stroke. Because the digital control is also a data processor, additional design information can be obtained during the test that would be valuable for designers, for quality control and for specialty sales. Additional features of the automated equipment include reduced testing costs, increased reliability and accuracy, uniformity, rapid data evaluation and print-out, and modular construction.

This paper describes the areas in material tension testing that would benefit by using automated procedures. In addition, a system is proposed that incorporates the manufacturing and research requirements for automated of the tension test. Modifications and additions to present equipment are described to show how this equipment can be automated without introducing drastic changes that adversely affect testing reliability and economical operation.