Applications of a laser displacement gauge in Hopkinson bar experiments
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Bibliographic record
Abstract
A laser displacement gauge(LDG) system is proposed.Both the static and dynamic calibrations are carried out,and the results show that the system is effective for dynamic test.As an efficient measuring method,the LDG can be applied in the Hopkinson bar experiment,such as:(1) the LDG can be used to monitor the radial displacement of the specimen,with which the dynamic Poisson's Ratio can be calculated;(2) the LDG can be adopted to measure the crack surface opening displacement of the notch in a dynamic fracture test,and then the dynamic fracture energy can be obtained by associating the signals from the strain gauges mounted on the bars;(3) an innovative Hopkinson bar system for testing ultra-soft materials under intermediate strain rates is developed,where the LDG is employed to monitor the deformation of the sample directly,and two piezoelectric force transducers are sandwiched between the specimen and two bars respectively to measure the weak dynamic loads directly.
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Codex and Gemma teacher scores by category
| Category | Codex | Gemma |
|---|---|---|
| Metaresearch | 0.000 | 0.000 |
| Meta-epidemiology (narrow) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.000 | 0.000 |
| Bibliometrics | 0.000 | 0.000 |
| Science and technology studies | 0.000 | 0.000 |
| Scholarly communication | 0.000 | 0.000 |
| Open science | 0.000 | 0.000 |
| Research integrity | 0.000 | 0.000 |
| Insufficient payload (model declined to judge) | 0.001 | 0.000 |
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