Effects of Strain Ratio on Fatigue Behavior of G20Mn5QT Cast Steel
Due to traffic and wave actions, cast steel joints are subjected to variable-amplitude fatigue loading, which may cause fatigue problems. The ratio of the minimum strain to the maximum strain （strain ratio）can be em- ployed to analyze the influence of variable-amplitude fatigue both in the elastic a...
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| Published in | Transactions of Tianjin University Vol. 22; no. 4; pp. 302 - 307 |
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| Main Author | |
| Format | Journal Article |
| Language | English |
| Published |
Tianjin
Tianjin University
01.08.2016
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| Subjects | |
| Online Access | Get full text |
| ISSN | 1006-4982 1995-8196 |
| DOI | 10.1007/s12209-016-2682-2 |
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| Abstract | Due to traffic and wave actions, cast steel joints are subjected to variable-amplitude fatigue loading, which may cause fatigue problems. The ratio of the minimum strain to the maximum strain （strain ratio）can be em- ployed to analyze the influence of variable-amplitude fatigue both in the elastic and plastic ranges. To evaluate the effect of the strain ratio on G20Mn5QT cast steel, the fatigue tests of smooth specimens were carried out at the strain ratio of 0.1. The cyclic deformation and the relationships between the strain amplitude, the stress amplitude, the Smith, Watson and Topper （SWT） parameter and fatigue life were studied and compared with those at the strain ratio of -I. Compared with other methods, Basquin formula and Solonberg formula provide reliable and appropriate ranges of S-N curve and fatigue limit at different strain ratios respectively. The SWT parameter can be used to predict the fatigue life at other strain ratios accurately. |
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| AbstractList | Due to traffic and wave actions, cast steel joints are subjected to variable-amplitude fatigue loading, which may cause fatigue problems. The ratio of the minimum strain to the maximum strain （strain ratio）can be em- ployed to analyze the influence of variable-amplitude fatigue both in the elastic and plastic ranges. To evaluate the effect of the strain ratio on G20Mn5QT cast steel, the fatigue tests of smooth specimens were carried out at the strain ratio of 0.1. The cyclic deformation and the relationships between the strain amplitude, the stress amplitude, the Smith, Watson and Topper （SWT） parameter and fatigue life were studied and compared with those at the strain ratio of -I. Compared with other methods, Basquin formula and Solonberg formula provide reliable and appropriate ranges of S-N curve and fatigue limit at different strain ratios respectively. The SWT parameter can be used to predict the fatigue life at other strain ratios accurately. Due to traffic and wave actions, cast steel joints are subjected to variable-amplitude fatigue loading, which may cause fatigue problems. The ratio of the minimum strain to the maximum strain(strain ratio)can be em-ployed to analyze the influence of variable-amplitude fatigue both in the elastic and plastic ranges. To evaluate the effect of the strain ratio on G20Mn5QT cast steel, the fatigue tests of smooth specimens were carried out at the strain ratio of 0.1. The cyclic deformation and the relationships between the strain amplitude, the stress amplitude, the Smith, Watson and Topper(SWT)parameter and fatigue life were studied and compared with those at the strain ratio of-1. Compared with other methods, Basquin formula and Solonberg formula provide reliable and appropri-ate ranges ofS-N curve and fatigue limit at different strain ratios respectively. The SWT parameter can be used to predict the fatigue life at other strain ratios accurately. Due to traffic and wave actions, cast steel joints are subjected to variable-amplitude fatigue loading, which may cause fatigue problems. The ratio of the minimum strain to the maximum strain(strain ratio)can be employed to analyze the influence of variable-amplitude fatigue both in the elastic and plastic ranges. To evaluate the effect of the strain ratio on G20Mn5QT cast steel, the fatigue tests of smooth specimens were carried out at the strain ratio of 0.1. The cyclic deformation and the relationships between the strain amplitude, the stress amplitude, the Smith, Watson and Topper(SWT)parameter and fatigue life were studied and compared with those at the strain ratio of -1. Compared with other methods, Basquin formula and Solonberg formula provide reliable and appropriate ranges of S-N curve and fatigue limit at different strain ratios respectively. The SWT parameter can be used to predict the fatigue life at other strain ratios accurately. |
| Author | 韩庆华 郭琪 尹越 邢颖 |
| AuthorAffiliation | School of Civil Engineering, Tianjin University, Tianjin 300072, China Key Laboratory of Coast Civil Structure and Safety of Ministry of Education, Tianjin University, Tianjin 300072, China |
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| Cites_doi | 10.1002/tal.1111 10.1016/j.msea.2009.04.051 10.1016/j.jcsr.2006.08.002 10.1016/j.ijfatigue.2012.04.013 10.1007/s13296-016-3020-1 |
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| Keywords | strain ratio fatigue life G20Mn5QT cast steel fatigue test |
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| Notes | Due to traffic and wave actions, cast steel joints are subjected to variable-amplitude fatigue loading, which may cause fatigue problems. The ratio of the minimum strain to the maximum strain （strain ratio）can be em- ployed to analyze the influence of variable-amplitude fatigue both in the elastic and plastic ranges. To evaluate the effect of the strain ratio on G20Mn5QT cast steel, the fatigue tests of smooth specimens were carried out at the strain ratio of 0.1. The cyclic deformation and the relationships between the strain amplitude, the stress amplitude, the Smith, Watson and Topper （SWT） parameter and fatigue life were studied and compared with those at the strain ratio of -I. Compared with other methods, Basquin formula and Solonberg formula provide reliable and appropriate ranges of S-N curve and fatigue limit at different strain ratios respectively. The SWT parameter can be used to predict the fatigue life at other strain ratios accurately. 12-1248/T Han Qinghua 1,2, Guo Qi 1 ,Yin Yue 2, Xing Ying 1 （1. School of Civil Engineering, Tianjin University, Tianjin 300072, China; 2. Key Laboratory of Coast Civil Structure and Safety of Ministry of Education, Tianjin University, Tianjin 300072, China） fatigue test; G20Mn5QT cast steel; strain ratio; fatigue life |
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| References | Det Norske (CR4) 2011 (CR10) 2005 Yu, Zhang, Jiang (CR6) 2012; 44 Schober (CR1) 2003 (CR5) 2003 Begum, Chen, Xu (CR7) 2009; 517 Han, Guo, Yin (CR9) 2016; 16 Chen, Zhang, Jin (CR3) 2009; 30 Zheng, Wang, Yan (CR12) 2013 Jin, Li, Mo (CR2) 2014; 23 (CR8) 2008 Chen, Grondin, Driver (CR11) 2007; 63 H Chen (2682_CR3) 2009; 30 Q Yu (2682_CR6) 2012; 44 European Committee for StandardizationCEN. (2682_CR10) 2005 H Jin (2682_CR2) 2014; 23 X Zheng (2682_CR12) 2013 H Chen (2682_CR11) 2007; 63 S Begum (2682_CR7) 2009; 517 Veritas Det Norske (2682_CR4) 2011 H Schober (2682_CR1) 2003 Q Han (2682_CR9) 2016; 16 International Institute of WeldingIIW. (2682_CR5) 2003 Tongji University. (2682_CR8) 2008 |
| References_xml | – volume: 23 start-page: 1119 issue: 15 year: 2014 end-page: 1140 ident: CR2 article-title: Fatigue of girth butt weld for cast steel node connection in tower structure under wave loadings[J] publication-title: Structural Design of Tall and Special Buildings doi: 10.1002/tal.1111 – volume: 517 start-page: 334 issue: 1/2 year: 2009 end-page: 343 ident: CR7 article-title: Effect of strain ratio and strain rate on low cycle fatigue behavior of AZ31 wrought magnesium alloy[J] publication-title: Materials Science and Engineering A doi: 10.1016/j.msea.2009.04.051 – volume: 63 start-page: 838 issue: 6 year: 2007 end-page: 848 ident: CR11 article-title: Characterization of fatigue properties of ASTM A709 high performance steel[J] publication-title: Journal of Constructional Steel Research doi: 10.1016/j.jcsr.2006.08.002 – volume: 44 start-page: 225 year: 2012 end-page: 233 ident: CR6 article-title: Effect of strain ratio on cyclic deformation and fatigue of extruded AZ61A magnesium alloy[J] publication-title: International Journal of Fatigue doi: 10.1016/j.ijfatigue.2012.04.013 – volume: 30 start-page: 149 issue: 5 year: 2009 end-page: 154 ident: CR3 article-title: Experimental study on fatigue properties of cast-steel joints of Hangzhou Bay Sightseeing Tower[J] publication-title: Journal of Building Structures – volume: 16 start-page: 139 issue: 1 year: 2016 end-page: 149 ident: CR9 article-title: Fatigue behaviour of G20Mn5QT cast steel and butt welds with Q345B steel[J] publication-title: International Journal of Steel Structures doi: 10.1007/s13296-016-3020-1 – year: 2011 ident: CR4 publication-title: Recommended Practice DNV-RPC203 Fatigue Design of Offshore Steel Structures[S] – year: 2005 ident: CR10 publication-title: DIN EN 10293 Steel Castings for General Engineering Uses[S] – year: 2003 ident: CR5 publication-title: IIW Document XIII-1965-03/ XV-1127-03 Recommendations for Fatigue Design of Welded Joints and Components[S] – start-page: 143 year: 2003 end-page: 152 ident: CR1 article-title: Cast steel joints for tubular structures[C] publication-title: The 10th International Symposium on Tubular Structures – year: 2008 ident: CR8 publication-title: CECS 235: 2008 Technical Specification for Application of Connections of Structural Steel Casting[S] – year: 2013 ident: CR12 publication-title: {iyFatigue Theory of Materials and Engineering Applications} – volume-title: Recommended Practice DNV-RPC203 Fatigue Design of Offshore Steel Structures[S] year: 2011 ident: 2682_CR4 – volume: 23 start-page: 1119 issue: 15 year: 2014 ident: 2682_CR2 publication-title: Structural Design of Tall and Special Buildings doi: 10.1002/tal.1111 – volume: 44 start-page: 225 year: 2012 ident: 2682_CR6 publication-title: International Journal of Fatigue doi: 10.1016/j.ijfatigue.2012.04.013 – volume: 63 start-page: 838 issue: 6 year: 2007 ident: 2682_CR11 publication-title: Journal of Constructional Steel Research doi: 10.1016/j.jcsr.2006.08.002 – volume-title: IIW Document XIII-1965-03/ XV-1127-03 Recommendations for Fatigue Design of Welded Joints and Components[S] year: 2003 ident: 2682_CR5 – volume-title: CECS 235: 2008 Technical Specification for Application of Connections of Structural Steel Casting[S] year: 2008 ident: 2682_CR8 – volume: 517 start-page: 334 issue: 1/2 year: 2009 ident: 2682_CR7 publication-title: Materials Science and Engineering A doi: 10.1016/j.msea.2009.04.051 – volume-title: DIN EN 10293 Steel Castings for General Engineering Uses[S] year: 2005 ident: 2682_CR10 – volume: 16 start-page: 139 issue: 1 year: 2016 ident: 2682_CR9 publication-title: International Journal of Steel Structures doi: 10.1007/s13296-016-3020-1 – start-page: 143 volume-title: The 10th International Symposium on Tubular Structures year: 2003 ident: 2682_CR1 – volume: 30 start-page: 149 issue: 5 year: 2009 ident: 2682_CR3 publication-title: Journal of Building Structures – volume-title: {iyFatigue Theory of Materials and Engineering Applications} year: 2013 ident: 2682_CR12 |
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| Snippet | Due to traffic and wave actions, cast steel joints are subjected to variable-amplitude fatigue loading, which may cause fatigue problems. The ratio of the... |
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| Title | Effects of Strain Ratio on Fatigue Behavior of G20Mn5QT Cast Steel |
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