Measurement of long‐term dimensional stability with electrical resistance strain gauges
Source abstract
Abstract
Sheet materials with low thermal expansion are employed in the construction of certain precision components and must display excellent dimensional stability. Measurement of small dimensional changes in sheet materials over long periods of time (of the order of two parts per million per year) poses severe experimental problems when conventional measuring techniques such as interferometry are used. To avoid these difficulties, experiments were conducted to explore the usefulness of bonded electrical resistance strain gauges for measuring the dimensional stability of sheet specimens. Based on the results obtained, it is concluded that the strain gauge method is capable of detecting gradual length changes as small as about 1 or 2 parts per million over time periods approaching one year.
Source: crossref · Quality: baseline
Research context
OpenAlex topics: Advanced MEMS and NEMS Technologies · Structural Health Monitoring Techniques · Sensor Technology and Measurement Systems
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
References (7)
Show source-provided references
1. Secular length changes of gage blocks during twenty‐five years
2. Gage blocks of superior stability: initial developments in materials and measurement
3. The development of more stable gage blocks
4. Dimensional stability of gage block materials
5. Stress relaxation as a source of dimensional instability
6. Marschall C. W. Maringer R. E. andCepollina F. J. ‘Dimensional stability and micromechanical properties of materials for use in an orbiting astronomical observatory’ AIAA Paper 72–325 (1972).10.2514/6.1972-325 ↗
7. The dimensional behaviour of invar