| id |
ndltd-OhioLink-oai-etd.ohiolink.edu-osu1209585565
|
| record_format |
oai_dc
|
| spelling |
ndltd-OhioLink-oai-etd.ohiolink.edu-osu12095855652021-08-03T05:53:34Z Development of a novel vibration based high cycle fatigue test method Seidt, Jeremy Daniel <p>A new vibration based test method for evaluating fatigue properties of aeroengine materials has been developed. In this method, fatigue energy is accumulated on a base-excited, cantilevered plate specimen at high frequency resonant modes such as the two-stripe mode. This method allows for great versatility in the ability to conduct multiaxial stress high cycle fatigue tests.</p><p>The test method has been developed at The Ohio State University and the Propulsion (PRT) and Material (MLLN) Directorates of the Air Force Research Laboratory (AFRL). Extensive pre-fatigue test FEA analysis and testing was performed to gainunderstanding of the test equipment and the dynamic behavior of various test specimens. The fatigue tests were performed on steel plate specimens on a 6,000 lb electrodynamic shaker at the Turbine Engine Fatigue Facility (PRT). Fatigue test data for steel was acquired by use of the step test method at fully reversed cyclic loading at high frequency modes. The fully reversed fatigue data point of a Goodman diagram has been constructed and compared to data found in the literature.</p><p>The optimal design problem of minimizing the ratio of maximum stress in the clamped edge of the plate to the maximum stress in the free edge of the plate has been analyzed. The sequential quadratic programming (SQP) optimization program, VMCON was linked to a finite element code named DPLATE which is capable of analyzing the free and forced vibration of flat plates to accomplish this task. An optimal solution was achieved via VMCON/DPLATE search processes in various case geometries with the design variable, the ratio of the length of the free edge to the length of the clamped edge. Plate specimen geometry was determined for which fretting fatigue and eventual failure at the clamped edge of the plate was no longer a major concern.</p> 2001 English text The Ohio State University / OhioLINK http://rave.ohiolink.edu/etdc/view?acc_num=osu1209585565 http://rave.ohiolink.edu/etdc/view?acc_num=osu1209585565 unrestricted This thesis or dissertation is protected by copyright: all rights reserved. It may not be copied or redistributed beyond the terms of applicable copyright laws.
|
| collection |
NDLTD
|
| language |
English
|
| sources |
NDLTD
|
| author |
Seidt, Jeremy Daniel
|
| spellingShingle |
Seidt, Jeremy Daniel
Development of a novel vibration based high cycle fatigue test method
|
| author_facet |
Seidt, Jeremy Daniel
|
| author_sort |
Seidt, Jeremy Daniel
|
| title |
Development of a novel vibration based high cycle fatigue test method
|
| title_short |
Development of a novel vibration based high cycle fatigue test method
|
| title_full |
Development of a novel vibration based high cycle fatigue test method
|
| title_fullStr |
Development of a novel vibration based high cycle fatigue test method
|
| title_full_unstemmed |
Development of a novel vibration based high cycle fatigue test method
|
| title_sort |
development of a novel vibration based high cycle fatigue test method
|
| publisher |
The Ohio State University / OhioLINK
|
| publishDate |
2001
|
| url |
http://rave.ohiolink.edu/etdc/view?acc_num=osu1209585565
|
| work_keys_str_mv |
AT seidtjeremydaniel developmentofanovelvibrationbasedhighcyclefatiguetestmethod
|
| _version_ |
1719427276258410496
|
