Modeling Approach for Predicting the Rate of Frequency Change of Notched Beam Exposed to Gaussian Random Excitation
During fatigue damage accumulation, cracks propagate through the material leading to catastrophic failure. As the cracks propagate, the natural frequency lowers, leading to a changing stress state. A new method has been developed where the damage accumulation rate is computed in the frequency domain...
Saved in:
| Main Authors: | , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
Wiley
2014-01-01
|
| Series: | Shock and Vibration |
| Online Access: | http://dx.doi.org/10.1155/2014/164039 |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| _version_ | 1832558829360906240 |
|---|---|
| author | Ed Habtour Mark Paulus Abhijit Dasgupta |
| author_facet | Ed Habtour Mark Paulus Abhijit Dasgupta |
| author_sort | Ed Habtour |
| collection | DOAJ |
| description | During fatigue damage accumulation, cracks propagate through the material leading to catastrophic failure. As the cracks propagate, the natural frequency lowers, leading to a changing stress state. A new method has been developed where the damage accumulation rate is computed in the frequency domain using Linear Elastic Fracture Mechanics (LEFM), stress intensity, and the natural frequency. A finite element model was developed to predict the stress intensity and natural frequency during damage accumulation. Validation of the LEFM technique was done through comparison to experimental data. Reasonably good correlations between the FEM and the analytic model were achieved for the stress intensity and natural frequency. |
| format | Article |
| id | doaj-art-d4ef9b5f46da416baa0b137d41f515f7 |
| institution | Kabale University |
| issn | 1070-9622 1875-9203 |
| language | English |
| publishDate | 2014-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | Shock and Vibration |
| spelling | doaj-art-d4ef9b5f46da416baa0b137d41f515f72025-02-03T01:31:28ZengWileyShock and Vibration1070-96221875-92032014-01-01201410.1155/2014/164039164039Modeling Approach for Predicting the Rate of Frequency Change of Notched Beam Exposed to Gaussian Random ExcitationEd Habtour0Mark Paulus1Abhijit Dasgupta2U.S. Army Research Laboratory, RDRL-Aberdeen Proving Ground, MD 21005, USANaval Undersea Warfare Center Division, 610 Dowell Street, Keyport, WA 98345, USADepartment of Mechanical Engineering, 2110 Martin Hall, University of Maryland, College Park, MD 20742, USADuring fatigue damage accumulation, cracks propagate through the material leading to catastrophic failure. As the cracks propagate, the natural frequency lowers, leading to a changing stress state. A new method has been developed where the damage accumulation rate is computed in the frequency domain using Linear Elastic Fracture Mechanics (LEFM), stress intensity, and the natural frequency. A finite element model was developed to predict the stress intensity and natural frequency during damage accumulation. Validation of the LEFM technique was done through comparison to experimental data. Reasonably good correlations between the FEM and the analytic model were achieved for the stress intensity and natural frequency.http://dx.doi.org/10.1155/2014/164039 |
| spellingShingle | Ed Habtour Mark Paulus Abhijit Dasgupta Modeling Approach for Predicting the Rate of Frequency Change of Notched Beam Exposed to Gaussian Random Excitation Shock and Vibration |
| title | Modeling Approach for Predicting the Rate of Frequency Change of Notched Beam Exposed to Gaussian Random Excitation |
| title_full | Modeling Approach for Predicting the Rate of Frequency Change of Notched Beam Exposed to Gaussian Random Excitation |
| title_fullStr | Modeling Approach for Predicting the Rate of Frequency Change of Notched Beam Exposed to Gaussian Random Excitation |
| title_full_unstemmed | Modeling Approach for Predicting the Rate of Frequency Change of Notched Beam Exposed to Gaussian Random Excitation |
| title_short | Modeling Approach for Predicting the Rate of Frequency Change of Notched Beam Exposed to Gaussian Random Excitation |
| title_sort | modeling approach for predicting the rate of frequency change of notched beam exposed to gaussian random excitation |
| url | http://dx.doi.org/10.1155/2014/164039 |
| work_keys_str_mv | AT edhabtour modelingapproachforpredictingtherateoffrequencychangeofnotchedbeamexposedtogaussianrandomexcitation AT markpaulus modelingapproachforpredictingtherateoffrequencychangeofnotchedbeamexposedtogaussianrandomexcitation AT abhijitdasgupta modelingapproachforpredictingtherateoffrequencychangeofnotchedbeamexposedtogaussianrandomexcitation |