Two-Parameter Mechanistic model for the Fatigue Crack Growth of Metals
In this paper, a two-parameter mechanistic model for the fatigue crack growth has been developed. Fatigue failure is the major causes of mechanical structural failure. The fatigue failure progress in three stages crack initiation, crack growth and final failure. The fatigue crack growth has been mo...
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| Format: | Article |
| Language: | English |
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National University of Sciences and Technology, Islamabad
2019-12-01
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| Series: | NUST Journal of Engineering Sciences |
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| Online Access: | https://journals.nust.edu.pk/index.php/njes/article/view/425 |
| _version_ | 1797860862295277568 |
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| author | Tawqeer Zada |
| author_facet | Tawqeer Zada |
| author_sort | Tawqeer Zada |
| collection | DOAJ |
| description |
In this paper, a two-parameter mechanistic model for the fatigue crack growth has been developed. Fatigue failure is the major causes of mechanical structural failure. The fatigue failure progress in three stages crack initiation, crack growth and final failure. The fatigue crack growth has been modelled by different approaches, however these approaches are generally empirical. In this paper, a mechanistic fatigue crack growth model is proposed. The striation and its relation to the cyclic load is used for the model development. Scanning electronic microscope results are used to establish relation between striation and crack growth. The developed model is two-parameters. The model has been implemented and validated using experimental data from the literature. The model prediction is satisfactory in region II of the crack growth curve. However, in region I and region III the model deviates from experimental data. It is suggested to incorporate interaction of monotonic and cyclic loading in the mechanistic modelling for the fatigue growth.
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| first_indexed | 2024-04-09T21:52:48Z |
| format | Article |
| id | doaj.art-19cbee3f7c404259badd56cc78ba1b25 |
| institution | Directory Open Access Journal |
| issn | 2070-9900 2411-6319 |
| language | English |
| last_indexed | 2024-04-09T21:52:48Z |
| publishDate | 2019-12-01 |
| publisher | National University of Sciences and Technology, Islamabad |
| record_format | Article |
| series | NUST Journal of Engineering Sciences |
| spelling | doaj.art-19cbee3f7c404259badd56cc78ba1b252023-03-24T11:36:46ZengNational University of Sciences and Technology, IslamabadNUST Journal of Engineering Sciences2070-99002411-63192019-12-0112210.24949/njes.v12i2.425Two-Parameter Mechanistic model for the Fatigue Crack Growth of MetalsTawqeer Zada0IIUI In this paper, a two-parameter mechanistic model for the fatigue crack growth has been developed. Fatigue failure is the major causes of mechanical structural failure. The fatigue failure progress in three stages crack initiation, crack growth and final failure. The fatigue crack growth has been modelled by different approaches, however these approaches are generally empirical. In this paper, a mechanistic fatigue crack growth model is proposed. The striation and its relation to the cyclic load is used for the model development. Scanning electronic microscope results are used to establish relation between striation and crack growth. The developed model is two-parameters. The model has been implemented and validated using experimental data from the literature. The model prediction is satisfactory in region II of the crack growth curve. However, in region I and region III the model deviates from experimental data. It is suggested to incorporate interaction of monotonic and cyclic loading in the mechanistic modelling for the fatigue growth. https://journals.nust.edu.pk/index.php/njes/article/view/425MechanisticFatigueStriationSEMtwo-parameter. |
| spellingShingle | Tawqeer Zada Two-Parameter Mechanistic model for the Fatigue Crack Growth of Metals NUST Journal of Engineering Sciences Mechanistic Fatigue Striation SEM two-parameter. |
| title | Two-Parameter Mechanistic model for the Fatigue Crack Growth of Metals |
| title_full | Two-Parameter Mechanistic model for the Fatigue Crack Growth of Metals |
| title_fullStr | Two-Parameter Mechanistic model for the Fatigue Crack Growth of Metals |
| title_full_unstemmed | Two-Parameter Mechanistic model for the Fatigue Crack Growth of Metals |
| title_short | Two-Parameter Mechanistic model for the Fatigue Crack Growth of Metals |
| title_sort | two parameter mechanistic model for the fatigue crack growth of metals |
| topic | Mechanistic Fatigue Striation SEM two-parameter. |
| url | https://journals.nust.edu.pk/index.php/njes/article/view/425 |
| work_keys_str_mv | AT tawqeerzada twoparametermechanisticmodelforthefatiguecrackgrowthofmetals |