Numerical Simulation of the Effect of Pre-Strain on Fatigue Crack Growth in AA2024-T351
The objective here is to study the effect of pre-strain on fatigue crack growth (FCG) in 2024-T351 aluminum alloy. Three pre-strain conditions were considered: without pre-strain, compressive and tensile permanent pre-strains of 4%. A numerical approach based on cumulative plastic strain at the crac...
Saved in:
| Main Authors: | , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
MDPI AG
2025-04-01
|
| Series: | Metals |
| Subjects: | |
| Online Access: | https://www.mdpi.com/2075-4701/15/5/481 |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| _version_ | 1849327092099973120 |
|---|---|
| author | Diogo M. Neto Edmundo Sérgio André Agra Fernando V. Antunes |
| author_facet | Diogo M. Neto Edmundo Sérgio André Agra Fernando V. Antunes |
| author_sort | Diogo M. Neto |
| collection | DOAJ |
| description | The objective here is to study the effect of pre-strain on fatigue crack growth (FCG) in 2024-T351 aluminum alloy. Three pre-strain conditions were considered: without pre-strain, compressive and tensile permanent pre-strains of 4%. A numerical approach based on cumulative plastic strain at the crack tip was followed to predict FCG rate. The compressive pre-strain increased FCG rate, while the tensile pre-strain reduced the <i>da</i>/<i>dN</i> relative to the situation without pre-strain. The influence of pre-strain was linked with plasticity-induced crack closure. In fact, a linear trend was obtained between <i>da</i>/<i>dN</i> and ΔK<sub>eff</sub> for three crack lengths (a = 16.184; a = 15.048 mm and a = 15.152 mm) and three pre-strain conditions. The increase in the stress ratio from R = 0.1 to R = 0.5 and the elimination of the contact of crack flanks significantly reduced the effect of pre-strain, also pointing to the huge relevance of crack closure in this context. Finally, the effect of pre-strain on <i>da</i>/<i>dN</i> after an overload was also explained by crack closure variations. |
| format | Article |
| id | doaj-art-744a82d2c9fa4d36a0110f7db4e96bec |
| institution | Kabale University |
| issn | 2075-4701 |
| language | English |
| publishDate | 2025-04-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Metals |
| spelling | doaj-art-744a82d2c9fa4d36a0110f7db4e96bec2025-08-20T03:47:58ZengMDPI AGMetals2075-47012025-04-0115548110.3390/met15050481Numerical Simulation of the Effect of Pre-Strain on Fatigue Crack Growth in AA2024-T351Diogo M. Neto0Edmundo Sérgio1André Agra2Fernando V. Antunes3University of Coimbra, Centre for Mechanical Engineering, Materials and Processes (CEMMPRE), ARISE, Department of Mechanical Engineering, Pólo II, Rua Luís Reis Santos, 3030-788 Coimbra, PortugalUniversity of Coimbra, Centre for Mechanical Engineering, Materials and Processes (CEMMPRE), ARISE, Department of Mechanical Engineering, Pólo II, Rua Luís Reis Santos, 3030-788 Coimbra, PortugalUniversity of Coimbra, Centre for Mechanical Engineering, Materials and Processes (CEMMPRE), ARISE, Department of Mechanical Engineering, Pólo II, Rua Luís Reis Santos, 3030-788 Coimbra, PortugalUniversity of Coimbra, Centre for Mechanical Engineering, Materials and Processes (CEMMPRE), ARISE, Department of Mechanical Engineering, Pólo II, Rua Luís Reis Santos, 3030-788 Coimbra, PortugalThe objective here is to study the effect of pre-strain on fatigue crack growth (FCG) in 2024-T351 aluminum alloy. Three pre-strain conditions were considered: without pre-strain, compressive and tensile permanent pre-strains of 4%. A numerical approach based on cumulative plastic strain at the crack tip was followed to predict FCG rate. The compressive pre-strain increased FCG rate, while the tensile pre-strain reduced the <i>da</i>/<i>dN</i> relative to the situation without pre-strain. The influence of pre-strain was linked with plasticity-induced crack closure. In fact, a linear trend was obtained between <i>da</i>/<i>dN</i> and ΔK<sub>eff</sub> for three crack lengths (a = 16.184; a = 15.048 mm and a = 15.152 mm) and three pre-strain conditions. The increase in the stress ratio from R = 0.1 to R = 0.5 and the elimination of the contact of crack flanks significantly reduced the effect of pre-strain, also pointing to the huge relevance of crack closure in this context. Finally, the effect of pre-strain on <i>da</i>/<i>dN</i> after an overload was also explained by crack closure variations.https://www.mdpi.com/2075-4701/15/5/481fatigue crack growthAA2024-T351pre-straincrack closureCTOD |
| spellingShingle | Diogo M. Neto Edmundo Sérgio André Agra Fernando V. Antunes Numerical Simulation of the Effect of Pre-Strain on Fatigue Crack Growth in AA2024-T351 Metals fatigue crack growth AA2024-T351 pre-strain crack closure CTOD |
| title | Numerical Simulation of the Effect of Pre-Strain on Fatigue Crack Growth in AA2024-T351 |
| title_full | Numerical Simulation of the Effect of Pre-Strain on Fatigue Crack Growth in AA2024-T351 |
| title_fullStr | Numerical Simulation of the Effect of Pre-Strain on Fatigue Crack Growth in AA2024-T351 |
| title_full_unstemmed | Numerical Simulation of the Effect of Pre-Strain on Fatigue Crack Growth in AA2024-T351 |
| title_short | Numerical Simulation of the Effect of Pre-Strain on Fatigue Crack Growth in AA2024-T351 |
| title_sort | numerical simulation of the effect of pre strain on fatigue crack growth in aa2024 t351 |
| topic | fatigue crack growth AA2024-T351 pre-strain crack closure CTOD |
| url | https://www.mdpi.com/2075-4701/15/5/481 |
| work_keys_str_mv | AT diogomneto numericalsimulationoftheeffectofprestrainonfatiguecrackgrowthinaa2024t351 AT edmundosergio numericalsimulationoftheeffectofprestrainonfatiguecrackgrowthinaa2024t351 AT andreagra numericalsimulationoftheeffectofprestrainonfatiguecrackgrowthinaa2024t351 AT fernandovantunes numericalsimulationoftheeffectofprestrainonfatiguecrackgrowthinaa2024t351 |