Abstract
Both sound-proofing and sound-conditioning methods were employed in the construction of a sound-insulation room to house a 1 kHz servohydraulic fatigue testing machine to protect researchers from excessive noises caused by the running machine. The "box inside a box" construction and acoustical foams were used to improve the sound insulation of the room. Special attention was paid to a door, a window, and cable holes. In addition, the specimen self-heating effect during a high-frequency fatigue experiment was found to influence the fatigue life of materials. The specimen temperature in air during fatigue tests at 700 Hz is much higher than at 10 Hz. The fatigue resistance was lessened by a higher specimen temperature. A cooling method using nitrogen gas was employed to control the specimen temperature during fatigue testing. The fatigue lives of specimens in air were generally longer for the tests conducted at 700 Hz with cooling using nitrogen gas, as compared to those without cooling, and were comparable with those at 10 Hz in air.
| Original language | English |
|---|---|
| Pages (from-to) | 92-97 |
| Number of pages | 6 |
| Journal | Journal of Testing and Evaluation |
| Volume | 34 |
| Issue number | 2 |
| State | Published - Mar 2006 |
Funding
We acknowledge the financial support of the National Science Foundation (NSF), the Division of Design, Manufacture, and Industrial Innovation, under Grant No. DMI-9724476, the NSF Combined Research-Curriculum Development (CRCD) Program, under EEC-9527527 and EEC-0203415, the NSF Integrative Graduate Education and Research Training (IGERT) Program under 9987548, the NSF International Materials Institutes (IMI) Program, under DMR-0231320, and the NSF Major Research Instrumentation (MRI) Program, under DMR-0421219, to the University of Tennessee, Knoxville, with Dr. D. R. Durham, Ms. M. Poats, Dr. C. J. Van Hartesveldt, Dr. D. Dutta, Dr. P. W. Jennings, Dr. L. S. Goldberg, Dr. L. Clesceri, Dr. C. Huber, and C. E. Bouldin of NSF as Program Directors, respectively. We appreciate the financial support of the Center for Materials Processing and the Office of Research Administration at the University of Tennessee, Knoxville, with Dr. C. J. McHargue and Dr. B. Collier as the Director and Vice Chancellor, respectively.
Keywords
- 1 kHz fatigue
- Sound-conditioning
- Sound-proofing
- Specimen temperature