Brands     Vishay Measurements Group     Educational Program     Just for Educators (Issue 5)
Experimental Stress Analysis NOTEBOOK Issue 5 - February 1987 Contents Lord Kelvin's Strain Gage - Editorial ... Page 1 - The response of a electrical resistance strain gage to strain, free thermal expansion, and temperature are based on Lord Kelvin's discoveries. The Problem at Hand: A Mythical Case History - Strain Measurement Technology ... Page 2 - Combined strains and thermal output in a railroad rail subjected to temperature changes but not allowed to freely expand. Local Ground Rules - Strain Measurement Technology ... Page 3 - Definitions of stress and strain, free thermal expansion, stresses of thermal origin. What Goes In Must Come Out - Strain Measurement Technology ... Page 4 - How thermal stress and thermal output are generated in strain gages. How thermal output is separated from the strain measurement. In a Nutshell - Strain Measurement Technology ... Page 8 - How the strain gage and instrument interpret mechanical strain, temperature, and free thermal expansion. Pieces of the Puzzle - Student Exercise ... Page 9 (An online version is also available.) - Demonstration of strain, free thermal expansion, and thermal output with a simple beam subjected to cantilever bending. Handling Apparent Strain - Strain Measurement Technology ... Page 12 - Three techniques for eliminating thermal output from the measurement signals. Dealing with Free Thermal Expansion - Strain Measurement Technology ... Page 15 - Experimental method for measuring free thermal expansion with strain gages. To request a copy of this issue, contact the Educational Program Coordinator.