Technical Articles
Universal testing machines are used to measure the mechanical properties of materials in tension, compression, bending or torsion. The American Society for Testing and Materials, ASTM, governs the testing of materials in the United States and in many other parts of the world. The table below provides links to articles detailing how to perform a tensile test according to ASTM standards, tensile testing tips, sources of errors in tensile testing, and trends in materials testing. The definition and significance of many tensile properties such as engineering stress, engineering strain, true stress, true strain, ultimate strength, proportional limit, modulus of elasticity, offset yield strength, E517 plastic strain ratio r, E646 K and n values, percent elongation and poisson's ratio are given. The characteristics of hydraulic and electro-mechanical testing machines, the use of extensometers, tensile grips and fixtures is also discussed. I hope you find the articles useful and feedback is always appreciated.
| Article | Magazine Published |
| Effects of Sensor Location in Materials Testing | LaboratoryTalk September 2007 |
| Measuring the Ductility of Metals | Quality/NDT June 2007 |
| Measurement Errors in Mechanical Testing |
Advanced Materials & Processes April 2007 |
| Trends in Mechanical Testing | Advanced Materials & Processes February 2007 |
| Do I Retrofit or Replace my Universal Testing Machine |
Metals Weekly July 2005 |
| Tensile Testing Basics, Tips & Trends |
Quality January 2005 |
| Mechanical Testing of Tiny Devices |
Advanced Materials & Processes August 2004 |
| Do Your Materials Measure Up? | Quality January 2004 |
| Sheet Metal Formability | Advanced Materials & Processes August 2002 |
| Guide to Testing Metals Under Tension |
Advanced Materials & Processes February 2002 |
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