Application of ductility exhaustion based damage model to predict creep rupture time of grade 92 steel
To accurately predict the creep rupture time of notched bar becomes a challenge to academia and structural engineer due to complex stress-strain distribution around the notch throat. This paper presents a Finite Element (FE) simulation employing ductility exhaustion based damage model to predict cre...
| Main Authors: | , |
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| Format: | Conference or Workshop Item |
| Language: | English |
| Published: |
IOP Publishing
2019
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| Subjects: | |
| Online Access: | http://umpir.ump.edu.my/id/eprint/26990/ http://umpir.ump.edu.my/id/eprint/26990/13/Application%20of%20ductility%20exhaustion%20based%20damage%20model.pdf |
| _version_ | 1848822676229980160 |
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| author | Nasrul Azuan, Alang N., Ab Razak |
| author_facet | Nasrul Azuan, Alang N., Ab Razak |
| author_sort | Nasrul Azuan, Alang |
| building | UMP Institutional Repository |
| collection | Online Access |
| description | To accurately predict the creep rupture time of notched bar becomes a challenge to academia and structural engineer due to complex stress-strain distribution around the notch throat. This paper presents a Finite Element (FE) simulation employing ductility exhaustion based damage model to predict creep rupture time of multiaxial notched bar Grade 92 steel. Three different notch acuity, ƞ = 2.5, 5.0 and 12.0 were simulated and the FE predicted rupture time was compared to the available experimental rupture data. The reduction of creep ductility due to geometrical constraint is considered during the simulation by employing the void growth model. Further reduction in ductility at long term period arise from internal microstructural changes or damage is also accounted. Furthermore, empirical-type exponential prediction model coupled with skeletal stresses is applied to provide upper/lower bounds for short and long term rupture data. It is found that the FE prediction agreed well with the experimental data. At short-term, notched bar ruptured is controlled by the von-Mises stress while at long-term the rupture is controlled by the maximum principal stress. |
| first_indexed | 2025-11-15T02:45:01Z |
| format | Conference or Workshop Item |
| id | ump-26990 |
| institution | Universiti Malaysia Pahang |
| institution_category | Local University |
| language | English |
| last_indexed | 2025-11-15T02:45:01Z |
| publishDate | 2019 |
| publisher | IOP Publishing |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | ump-269902020-03-22T23:21:11Z http://umpir.ump.edu.my/id/eprint/26990/ Application of ductility exhaustion based damage model to predict creep rupture time of grade 92 steel Nasrul Azuan, Alang N., Ab Razak TS Manufactures To accurately predict the creep rupture time of notched bar becomes a challenge to academia and structural engineer due to complex stress-strain distribution around the notch throat. This paper presents a Finite Element (FE) simulation employing ductility exhaustion based damage model to predict creep rupture time of multiaxial notched bar Grade 92 steel. Three different notch acuity, ƞ = 2.5, 5.0 and 12.0 were simulated and the FE predicted rupture time was compared to the available experimental rupture data. The reduction of creep ductility due to geometrical constraint is considered during the simulation by employing the void growth model. Further reduction in ductility at long term period arise from internal microstructural changes or damage is also accounted. Furthermore, empirical-type exponential prediction model coupled with skeletal stresses is applied to provide upper/lower bounds for short and long term rupture data. It is found that the FE prediction agreed well with the experimental data. At short-term, notched bar ruptured is controlled by the von-Mises stress while at long-term the rupture is controlled by the maximum principal stress. IOP Publishing 2019 Conference or Workshop Item PeerReviewed pdf en cc_by http://umpir.ump.edu.my/id/eprint/26990/13/Application%20of%20ductility%20exhaustion%20based%20damage%20model.pdf Nasrul Azuan, Alang and N., Ab Razak (2019) Application of ductility exhaustion based damage model to predict creep rupture time of grade 92 steel. In: IOP Conference Series: Materials Science and Engineering, 6th International Conference on Applications and Design in Mechanical Engineering , 26-27 August 2019 , Pulau Pinang, Malaysia. pp. 1-7., 670 (012001). ISSN 1757-899X (Published) https://doi.org/10.1088/1757-899X/670/1/012001 |
| spellingShingle | TS Manufactures Nasrul Azuan, Alang N., Ab Razak Application of ductility exhaustion based damage model to predict creep rupture time of grade 92 steel |
| title | Application of ductility exhaustion based damage model to predict creep rupture time of grade 92 steel |
| title_full | Application of ductility exhaustion based damage model to predict creep rupture time of grade 92 steel |
| title_fullStr | Application of ductility exhaustion based damage model to predict creep rupture time of grade 92 steel |
| title_full_unstemmed | Application of ductility exhaustion based damage model to predict creep rupture time of grade 92 steel |
| title_short | Application of ductility exhaustion based damage model to predict creep rupture time of grade 92 steel |
| title_sort | application of ductility exhaustion based damage model to predict creep rupture time of grade 92 steel |
| topic | TS Manufactures |
| url | http://umpir.ump.edu.my/id/eprint/26990/ http://umpir.ump.edu.my/id/eprint/26990/ http://umpir.ump.edu.my/id/eprint/26990/13/Application%20of%20ductility%20exhaustion%20based%20damage%20model.pdf |