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Vijayakumar, K. and Atluri, S. N. (1981), "Embedded elliptical crack in an infinite solid subject to arbitrary crack face tractions", Journal of Applied Mechanics, vol. 48, pp. 88-96. Vishay Micro Measurements (2007), Measurement of thermal expansion coefficient using strain gage. Vishay Micro Measurements (4 February 2005), Strain Gage Selection-Criteria, Procedures, Recommendation, Tech Note TN-505-4. Walker Technical Resources (2009), TechnoWrap2K. Walz, J. E., Fulton, R. E. and Cyrus, N. J. (1968), "Accuracy and Convergence of Finite Element Approximations", NASA Langley Research Centre, Full, vol. 150, no. AFFDL-TR-68-150, pp. 995-1027. Wan, C., Mita, A. and Kume, T. (2008), "An Automatic Pipeline Monitoring System Using Sound Information", Structural Control and Health Monitoring, vol. DOI: 10.1002/stc.295. Wang, C. S., Wu, F. and Chang, F. K. (2001), "Structural Health Monitoring from fibrereinforced composites to steel-reinforced concrete", Institute of Physics Publishing, Smart Mater. Struct., [Online], vol. 10. Wang, J., Harrison, P., Long, A. C. and Clifford, M. J. (2006), "Prediction and Characterization of the Shear Behaviour of Viscous Woven Textiles Composites", The 8th International Conference on Flow Processes in Composite Materials (FPCM8), 11 – 13 July, Douai, France. Wayman, M., ( 2008), Non Intrusive Pipeline Condition Assessment, Advanced Engineering Solutions Ltd. Weese, R. K., Burhanm, A. K. and Fontes, A. T. (2005), "An Investigation of Coefficient of Thermal Expansion, Decomposition Kinetics, and Reaction to Various Stimuli", 36th International Annual Conference of ICT & 32 nd International Pyrotechnics Seminar, Karlsruhe, Germany, 28 June - 1 July, Lawrence Livermore National Laboratory. Weymouth, L. J., Starr, J. E. and Dorsey, J. (1979), "Chapter 2: Bonded Resistance Strain Gages", in Strain Gauge Technology, pp. 112-120. WrapMaster, Inc. (2009), Composite Solutions for Pipelines and Structures, available at: http://www.wrapmaster.us (accessed April 2009). www.dnvsoftware.com (2006), ORBIT Pipeline Integrity, available at: http://www.dnv.com/binaries/orbit+pipelineintegrity_brochure_tcm4-159685.pdf (accessed December 2008). 216
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Page 1:
CRANFIELD UNIVERSITY MAHADI ABD MUR
Page 4 and 5:
ABSTRACT One of the most common pro
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TABLE OF CONTENTS ABSTRACT ........
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3.7.1 Introduction ................
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5.6 Summary and Conclusions .......
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Figure 3.1: Schematic diagram of th
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Figure 5.4: The average temperature
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NOMENCLATURES ACFM Alternating Curr
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1 INTRODUCTION One of the most comm
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1.1 Objectives Knowing this backgro
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The methodology of this integrated
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Chapter 6 contains the summary and
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period of the major part of the exi
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Figure 2.2: Reported interest in de
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Figure 2.4: Dent damage caused by v
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presented current practices, recent
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Energy Workforce Sdn Bhd (2011) cla
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available provides real time detect
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2.3.3 Reliability Analysis of Infor
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Figure 2.9: Pipeline failure probab
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2.3.3.1 NDT Reliability and POD cur
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increase in the yield limit of stee
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the SCC assessment in their integri
Page 51 and 52:
Manufacturers such as Walkers Techn
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Company L.P, 2005); Aquawrap ® pro
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monitoring, inspection, and damage
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2.6.2 Aims of Structural Health Mon
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Figure 2.16: Application fields and
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egistered by the piezoelectric sens
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discretization error. Round-off err
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notches and Neuber‘s is better fo
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maximum local stress at discontinui
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De Carvalho (2005) concludes that t
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accurate simulation of loading espe
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Based on the above facts, the opera
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3 FINITE ELEMENT ANALYSIS (FEA) IN
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Figure 3.2: Schematic diagram of th
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In this modelling work (i.e. compos
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This partition toolset also helps u
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Figure 3.6: Mesh control using Swee
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Figure 3.7: Schematic representatio
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discretization. Therefore, in this
Page 89 and 90:
According to Staten et al. (2010b),
Page 91 and 92:
3.5 The influence of pressure on th
Page 93 and 94:
each pressure value remains constan
Page 95 and 96:
Axial Stress, σa (S22) was referre
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Figure 3.14 shows a graph of analyt
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the notch defect is found to be in
Page 101 and 102:
One of the contributions of this st
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Table 3.4: Convergence tests on var
Page 105 and 106:
Figures 3.16 and 3.17 show that the
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Figure 3.20 shows that as the relat
Page 109 and 110:
3.7.4 Concluding Remarks A biaxial
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yarns change and lateral contact be
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For predicting E2 and Gl2, a number
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Where: Ar = weight of one sheet of
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Where; The Stiffness matrix is trad
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simulations for the hoop strain at
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Figure 3.24: Finding the hoop stres
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Table 3.8: The effect of repair len
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four up to 18 layers. In this study
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hoop and axial stress concentration
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Table 3.11: Predicted Elastic Const
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Table 3.13: Axial Stress v/s L/W ra
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Hoop Stress (MPa) Figure 3.3: Hoop
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However, Frost (2008) and Alexander
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Table 3.17: Ratio of Axial Stress N
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axial load (e.g. buried pipelines t
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3.10 Numerical Strain Analysis of C
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Figure 3.36 shows the contours befo
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Stress Concentration Factor 2 1.8 1
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In fact, for Notch 40 with 18 plies
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this second approach (i.e. the expe
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4.2.2 Strain Gauge Selection and Cr
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Finally, a method used to calculate
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Where, and are the maximum and mini
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should be between 20 and 28 bar and
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welded weld neck flange at both end
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Figure 4.7: Sensor and heating elem
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Figure 4.9: A summary of data acqui
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One of the objectives of doing this
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Figure 4.14: A schematic diagram of
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Table 4.1: Strain gauge readings at
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microstrain 3.00E-04 2.50E-04 2.00E
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However, the axial load transfer is
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Mircostrain 500 450 400 350 300 250
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Since the defect is not a flat notc
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Again, the epoxy resin plays a sign
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Table 4.4: Study at the defect area
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Mircostrain 300 250 200 150 100 50
Page 185 and 186: Mircostrain 600 500 400 300 200 100
Page 187 and 188: 14.25% in hoop strain and 23.5% in
Page 189 and 190: consideration for the selection of
Page 191 and 192: 5.4 Methodology of Thermal Expansio
Page 193 and 194: Figure 5.1: Some preventive measure
Page 195 and 196: 5.4.1 The Fundamentals of the Therm
Page 197 and 198: 5.5 Analysis of Results 5.5.1 The t
Page 199 and 200: Thermal Output (strain ) 0.0002 0.0
Page 201 and 202: (Strain ,ε) Figure 5.12: Coefficie
Page 203 and 204: (Strain ,ε) 0.0002 0.00018 0.00016
Page 205 and 206: Table 5.1: The strain readings afte
Page 207 and 208: maximum shear strain increase as th
Page 209 and 210: The above results show that shear s
Page 211 and 212: shear strains becomes more stable a
Page 213 and 214: for future safe design and operatio
Page 215 and 216: has been fully cured. Poor surface
Page 217 and 218: 6.3 Primary PhD Achievements The ea
Page 219 and 220: In Chapter 5, the CTE was determine
Page 221 and 222: ASM International (2002), "Thermal
Page 223 and 224: Bucinell, R. B. (2001), Calculating
Page 225 and 226: Proceedings of OMAE'01 20th Interna
Page 227 and 228: Greenwood, R. (2002), UKOPA Pipelin
Page 229 and 230: Kotrechko, S. A., Krasovskii, A. Y.
Page 231 and 232: Mousavi, S. E., Xiao, H. and Sukuma
Page 233 and 234: Raju, I. S. and Newman, J. C. (1986
Page 235: Tennyson, R. C. and Mufti, A. A. (2
Page 239 and 240: General Technical Specifications: T
Page 241 and 242: Photos of the Design and Build of t
Page 243 and 244: Composite Installation Process usin
Page 245 and 246: APPENDIX 3 - STRAIN GAUGE INSTALLAT
Page 247 and 248: Figure 7: Mylar tape was stuck onto
Page 249 and 250: Figure 19: Repeating the above proc
Page 251: 2) Electrical Insulation Test Resul
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