Publications
183 results found
Mehmanparast AN, Davies CM, Nikbin KM, 2010, VALIDATION OF THE <i>K</i> AND <i>J</i> PARAMETERS IN A COMPACT TENSION SPECIMEN CONTAINING INTERGRANULAR AND STRAIGHT CRACK PATHS, ASME Pressure Vessels and Piping Division/K-PVP Conference, Publisher: AMER SOC MECHANICAL ENGINEERS, Pages: 355-366
Kamel S, Davies C, Lee H, et al., 2010, EFFECT OF CRACK EXTENSION IN A COMPACT TENSION C(T) SPECIMEN CONTAINING A RESIDUAL STRESS ON THE STRESS INTENSITY FACTORS, ASME Pressure Vessels and Piping Division/K-PVP Conference, Publisher: AMER SOC MECHANICAL ENGINEERS, Pages: 1275-1280
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- Citations: 1
Davies CM, Webster GA, Nikbin KM, 2010, PREDICTIONS OF CREEP CRACK INITIATION PERIODS, ASME Pressure Vessels and Piping Division/K-PVP Conference, Publisher: AMER SOC MECHANICAL ENGINEERS, Pages: 313-322
Li D-F, O'Dowd NP, Davies CM, et al., 2010, EVALUATING THE MECHANICAL BEHAVIOR OF 316 STAINLESS STEEL AT THE MICROSCALE USING FINITE ELEMENT MODELLING AND IN-SITU NEUTRON SCATTERING, ASME Pressure Vessels and Piping Division/K-PVP Conference, Publisher: AMER SOC MECHANICAL ENGINEERS, Pages: 981-988
Davies CM, Hughes D, Wimpory RC, et al., 2010, MEASUREMENTS OF RESIDUAL STRESSES IN 316 STAINLESS STEEL WELDMENTS, ASME Pressure Vessels and Piping Division/K-PVP Conference, Publisher: AMER SOC MECHANICAL ENGINEERS, Pages: 1265-1273
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- Citations: 4
Biglari F, Davies CM, Nikbin KM, 2010, Development of Simulations Models under Thermo Mechanical Loading Conditions, Key Engineering Materials, Key Engineering Materials, Vol: 417-418, Pages: 69-72
Davies CM, Wimpory RC, Paradowska AM, et al., 2010, Residual Stress Measurements in Large Scale Component Sections” Materials Science Forum, Pages: 321-326
Wang L, Davies CM, Wimpory RC, et al., 2010, Measurement and simulation of temperature and residual stress distributions from friction stir welding AA2024 Al alloy, MATERIALS AT HIGH TEMPERATURES, Vol: 27, Pages: 167-178, ISSN: 0960-3409
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- Citations: 12
Davies CM, Dean DW, Mehmanparast AN, et al., 2010, THE INFLUENCE OF CREEP-FATIGUE INTERACTION ON HIGH TEMPERATURE CRACK GROWTH IN 316 STEEL WELDMENTS, Pressure Vessels and Piping Conference of the American-Society-of-Mechanical-Engineers, Publisher: AMER SOC MECHANICAL ENGINEERS, Pages: 1491-1502
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- Citations: 1
Davies CM, Dean DW, Mehmanparast AN, et al., 2010, COMPRESSIVE PRE-STRAIN EFFECTS ON THE CREEP AND CRACK GROWTH BEHAVIOUR OF 316H STAINLESS STEEL, ASME Pressure Vessels and Piping Division/K-PVP Conference, Publisher: AMER SOC MECHANICAL ENGINEERS, Pages: 323-330
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- Citations: 4
Davies CM, Beres M, Hughes D, et al., 2010, THE INFLUENCE OF GEOMETRIC AND WELDING PARAMETERS ON RESIDUAL STRESS IN THIN WELDED STEEL STRUCTURES, Pressure Vessels and Piping Conference of the American-Society-of-Mechanical-Engineers, Publisher: AMER SOC MECHANICAL ENGINEERS, Pages: 327-334
Davies CM, Webster GA, Nikbin KM, 2009, Predictions of creep crack initiation periods, 12th International Conference on Fracture 2009, ICF-12, Vol: 1, Pages: 397-406
Several procedures are available for estimating creep crack initiation (CCI) time periods prior to the onset of creep crack extension from an existing defect in high temperature components. The applicability of a procedure depends on the required material's data availability. Various methods are described including methods based on the creep fracture mechanics term C *, the crack opening displacement concept and the sigma-d approach. These procedures are applied to, and compared for, an austenitic and ferritic steel of relevance to the electric power generation industry. It is shown that reliable and conservative predictions can be obtained with all methods.
Davies CM, 2009, Predicting creep crack initiation in austenitic and ferritic steels using the creep toughness parameter and time-dependent failure assessment diagram, FATIGUE & FRACTURE OF ENGINEERING MATERIALS & STRUCTURES, Vol: 32, Pages: 820-836, ISSN: 8756-758X
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- Citations: 21
Nip KH, Gardner L, Davies CM, et al., 2009, Extremely low cycle fatigue tests on structural carbon steel and stainless steel, Journal of Constructional Steel Research, Vol: 66, Pages: 96-110, ISSN: 0143-974X
Cyclic material tests in the low and extremely low cycle fatigue regime were carried out to study the properties of structural carbon steel and stainless steel. A total of 62 experiments were performed in cyclic axial and bending configurations, with strain amplitudes up to ±15%. Materials from hot-rolled carbon steel (S355J2H), cold-formed carbon steel (S235JRH) and cold-formed austenitic stainless steel (EN 1.4301 and EN 1.4307) structural sections were tested and the results were compared. The strain–life data from the axial tests were used to derive suitable Coffin–Manson parameters for the three materials; two further extremely low cycle fatigue life prediction models were also considered. The results revealed that the three materials exhibit similar strain–life relationships despite significantly different elongations at fracture measured in monotonic tensile tests. The hysteretic responses of the materials at different strain amplitudes were used to calibrate a combined isotropic/kinematic cyclic material hardening model which can be incorporated into numerical models of structural members. The stainless steel specimens displayed significantly greater levels of cyclic hardening than the corresponding carbon steel samples. A relationship between the results obtained from axial and bending test arrangements was established through consideration of energy dissipation, enabling strain–life models to be derived from either means of testing.
Davies CM, Dean DW, Yatomi M, et al., 2009, The influence of test duration and geometry on the creep crack initiation and growth behaviour of 316H steel, MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING, Vol: 510-11, Pages: 202-206, ISSN: 0921-5093
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- Citations: 45
Shan X, Davies CM, Wangsdan T, et al., 2009, Thermo-mechanical modelling of a single-bead-on-plate weld using the finite element method, INTERNATIONAL JOURNAL OF PRESSURE VESSELS AND PIPING, Vol: 86, Pages: 110-121, ISSN: 0308-0161
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- Citations: 59
Tsunori M, Davies CM, Dye D, et al., 2009, NUMERICAL MODELLING OF RESIDUAL STRESS AND DISTORTION IN WELDED THIN STEEL PLATES, ASME Presure Vessels and Piping Conference 2008, Publisher: AMER SOC MECHANICAL ENGINEERS, Pages: 299-307
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- Citations: 1
Webster GA, Davies CM, Skelton RP, et al., 2009, Determination of Creep Crack Growth Incubation Periods in Type 316H Stainless Steel, 2nd International Creep Conference, Publisher: DESTECH PUBLICATIONS, INC, Pages: 1272-1282
Davies CM, Wimpory RC, Tabuchi M, et al., 2009, THE INFLUENCE OF SPECIMEN GEOMETRY AND TEST TIMES ON HIGH TEMPERATURE CRACK GROWTH BEHAVIOUR IN PARENT AND WELDED 316H STAINLESS STEEL, Pressure Vessels and Piping Conference of the American-Society-of-Mechanical-Engineers, Publisher: AMER SOC MECHANICAL ENGINEERS, Pages: 1221-1229
Davies CM, Wimpory RC, Dye D, et al., 2009, THE EFFECTS OF PLATE DIMENSIONS ON RESIDUAL STRESSES IN WELDED THIN STEEL PLATES, ASME Presure Vessels and Piping Conference 2008, Publisher: AMER SOC MECHANICAL ENGINEERS, Pages: 309-319
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- Citations: 1
Yatomi M, Davies CM, Nikbin KM, 2008, Creep crack growth simulations in 316H stainless steel, ENGINEERING FRACTURE MECHANICS, Vol: 75, Pages: 5140-5150, ISSN: 0013-7944
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- Citations: 61
Davies CM, Dean DW, Nikbin KM, et al., 2007, Interpretation of creep crack initiation and growth data for weldments, ENGINEERING FRACTURE MECHANICS, Vol: 74, Pages: 882-897, ISSN: 0013-7944
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- Citations: 24
Davies CM, O'Dowd NP, Nikbin KM, et al., 2007, An analytical and computational study of crack initiation under transient creep conditions, INTERNATIONAL JOURNAL OF SOLIDS AND STRUCTURES, Vol: 44, Pages: 1823-1843, ISSN: 0020-7683
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- Citations: 25
Davies CM, Wimpory RC, Beres M, et al., 2007, The effect of residual stress and microstructure on distortion in thin welded steel plates, Joint Conference of the ASME Pressure Vessels and Piping Division/8th International Conference on Creep and Fatigue at Elevated Temperatures, Publisher: AMER SOC MECHANICAL ENGINEERS, Pages: 851-858
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- Citations: 3
Davies CM, Mueller F, Nikbin KM, et al., 2007, Analysis of creep crack initiation and growth in different geometries for 316H and carbon manganese steels, 5th International ASTM/ESIS Symposium on Fatigue and Fracture, Publisher: AMER SOCIETY TESTING AND MATERIALS, Pages: 115-+, ISSN: 0066-0558
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- Citations: 5
Davies CM, Kourmpetis M, O'Dowd NP, et al., 2007, Experimental evaluation of the <i>J</i> or <i>C</i>* parameter for a range of cracked geometries, 5th International ASTM/ESIS Symposium on Fatigue and Fracture, Publisher: AMER SOCIETY TESTING AND MATERIALS, Pages: 321-340, ISSN: 0066-0558
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- Citations: 9
Davies CM, O'Dowd NP, Nikbin KM, et al., 2006, Prediction of creep crack initiation under transient stress conditions, American Society of Mechanical Engineers, Pressure Vessels and Piping Division (Publication) PVP, Vol: 2006, ISSN: 0277-027X
A method to predict the time for creep crack initiation (CCI) from a stationary crack tip is presented. The method is relevant to situations where small scale yield or widespread plasticity conditions prevail on initial loading. Initiation is considered to occur at the attainment of a critical creep strain at a small distance from the crack tip. The model proposed here considers the integrated effects of creep strain accumulation as the stress distribution changes from that on initial loading (controlled by J) to the steady state creep stress distribution (controlled by C*). Material properties are chosen to represent Type 316H stainless steel at 550°C and plane strain conditions are considered. For the conditions examined, the CCI times predicted are significantly shorter times than those predicted using a steady state creep model. Copyright © 2006 by ASME.
Davies CM, Mueller F, Nikbin KM, et al., 2006, Analysis of Creep Crack Initiation and Growth in Different Geometries for 316H and Carbon Manganese Steels”, Vol: 3
Davies CM, Nikbin KA, O'Dowd NP, et al., 2006, Prediction of crack initiation times for high temperature lifetime assessments, 8th International Conference on Engineering Structural Integrity Assessment, Publisher: EMAS PUBL LTD, Pages: 309-320
Davies CM, Kourmpetis M, O'Dowd NP, et al., 2006, Evaluation of the J or C* Parameter for a Range of Cracked Geometries, Journal of ASTM International
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