ACME 2011 Proceedings of the 19 UK National Conference of the ...

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PERMEABILITY ASSESSMENT OF HETEROGENEOUS POROUS MEDIA USING THE LATTICE BOLTZMANN METHOD B. D. Jones, Y. T. Feng 181 PREDICTION OF LAMINARIZATION WITH A ONE EQUATION SPALART-ALLMARAS MODEL Oriji U. Richard and Paul G. Tucker 185 COMPUTATIONAL MODELLING OF SURFACE TENSION IN FLUID FLOW SIMULATIONS R.J.D. Mackenzie, Ł. Kaczmarczyk and C.J. Pearce 189 IMMERSED FINITE ELEMENT METHOD FOR FLUID-STRUCTURE INTERACTION Thomas Ruberg, Fehmi Cirak <strong>19</strong>3 PREDICTING AIRCRAFT STRUCTURAL RESPONSE TO WATER IMPACT L. Papagiannis and J.C. Campbell <strong>19</strong>7 A COUPLING SIMULATION INTERFACE FOR PERFORMANCE-BASED WIND ENGINEERING OF TALL BUILDINGS Gordon H. Clannachan, Nenad Bićanić and Graham M. Copeland 201 PREDICTION OF LAMINAR SEPARATION BUBBLE USING URANS APPROACH V. Nagabhushana Rao, Richard Jefferson-Loveday and Paul G Tucker 205 Structures / Stress Analysis / Discrete Systems THERMO-MECHANICAL ANALYSIS OF STEEL FRAME STRUCTURES USING OPENSEES Jian Jiang and Asif Usmani 209 EFFICIENT REINFORCED CONCRETE DESIGN USING MODIFIED LINEAR ELASTIC FINITE ELEMENT ANALYSIS Xing Tan, Andrew. J. Deeks 213 COMPUTATIONAL HOMOGENISATION METHODS FOR FLEXIBLE MARINE RISERS ACCOUNTING FOR STRUCTURAL-TO-STRUCTURAL SCALE BRIDGING Ben Edmans, Giulio Alfano and Hamid Bahai 217 MODELLING THE RESPONSE OF TRUSSES IN FIRE Panagiotis Kotsovinos, Asif Usmani 221 FINITE ELEMENT ANALYSIS OF A NOVEL AIRCRAFT SEAT AGAINST STATIC CERTIFICATION REQUIREMENTS (CS 25.561) Omkar Gulavani, Kevin Hughes 225 APPLICATION FRAMEWORK AND DATA STRUCTURE TO INTRODUCE REAL-TIME STRESS ANALYSIS INTO EARLY DESIGN STAGES M.S. Mohamed, T.M. Foster, J. Trevelyan and G. Coates 229 DEVELOPMENT AND APPLICATION OF OPENSEES FOR A RC FRAME IN FIRE Jian Zhang, Asif Usmani, Jian Jiang, Yaqiang Jiang, Panagiotis Kotsovinos and Ian May 233 DAMAGE-BASED FRACTURE ANALYSIS FOR THE EVALUATION OF SEISMIC PERFORMANCE OF RC BRIDGE COULMNS M. O. Benamer, Y. T. Feng 237 NATURAL FREQUENCIES OF CRACKED ISOTROPIC & SPECIALLY ORTHOTROPIC PLATES USING THE EXTENDED FINITE ELEMENT METHOD S Natarajan, P Baiz, D Roy Mahapatra, T Rabczuk, P Kerfriden and S Bordas 241
A PROJECTED QUASI-NEWTON METHOD FOR DYNAMIC MULTIBODY FRICTIONAL CONTACT PROBLEMS Tomasz Koziara, Nenad Bicanic 245 MODELLING OF A POST-TENSIONED MODULAR STRUCTURE SYSTEM Tianxin Zheng, Yong Lu, Asif Usmani 249 Finite Element / Boundary Element / Meshless ENHANCED RECOVERY TECHNIQUES FOR ACCURATE EVALUATION OF ERROR ESTIMATES IN FE APPROXIMATIONS Octavio A. González-Estrada1, Juan José Ródenas, Stéphane P.A. Bordas, Pierre Kerfriden 253 MESH IMPROVEMENT METHODOLOGY FOR EVOLVING GEOMETRIES Alan Kelly, Chris Pearce and Lukasz Kaczmarczyk 257 RAPID RE-MESHING FOR REAL-TIME THREE-DIMENSIONAL BOUNDARY ELEMENT ANALYSIS T.M. Foster, M.S. Mohamed, J. Trevelyan and G. Coates 261 DETERMINATION OF POLYNOMIAL C1 SHAPE FUNCTIONS ON TRIANGULAR FINITE ELEMENTS Stefanos-Aldo Papanicolopulos and Antonis Zervos 265 A STABILISED FINITE ELEMENT METHOD USING RESIDUAL-FREE BUBBLE ENRICHMENT FOR SEMICONDUCTOR DEVICE SIMULATION R. Simpson, S. Bordas, P. Kerfriden and A. Asenov 269 THE ANNIHILATION OF PHYSICAL DISCONTINUITES IN FINITE ELEMENTS R. Darvizeh and K. Davey 273 FE-EFGM COUPLING USING MAXIMUM ENTROPY SHAPE FUNCTIONS AND ITS APPLICATION TO SMALL AND FINITE DEFORMATION Zahur Ullah, Charles E. Augarde, Roger S. Crouch and William M. Coombs 277 DRILLING ROTATIONS AND PARTION OF UNITY BOUNDARY ELEMENT METHOD (PUBEM) Hing Leung and Pedro M. Baiz 281 AN ISOGEOMETRIC BOUNDARY ELEMENT METHOD FOR ELASTOSTATIC PROBLEMS R.N. Simpson, S.P.A. Bordas, J. Trevelyan and P. Kerfriden 285 AN ELEMENT-FREE GALERKIN SCALED BOUNDARY METHOD Yiqian He, Haitian Yang and Andrew J. Deeks 291
Page 1: ACME 2011 Proceedings of the 19 th
Page 4 and 5: First published 2011 by Heriot-Watt
Page 7 and 8: CONTENTS Invited Lectures CHALLENGE
Page 9: A DAMAGE-MECHANICS-BASED RATE-DEPEN
Page 14 and 15: minimise the strain energy density.
Page 16 and 17: through individual rock blocks and
Page 18 and 19: (a) Finite element mesh (b) Gas mes
Page 21 and 22: Proceedings of the 19 th UK Confere
Page 23 and 24: T E −1 ( ) ( ) T ∂s ∂T − du
Page 27 and 28: nondimensional tangential velocity
Page 31 and 32: Figure 2: Results for an open arter
Page 35 and 36: (a) Abaqus model von Mises stress (
Page 39 and 40: Vle Vli De Di k1 (MPa) 8.34 2.11 1.
Page 43 and 44: 3 RESULTS AND DISCUSSIONS In this p
Page 47 and 48: The potential energy U of the tunne
Page 51 and 52: where the problem is formulated in
Page 55 and 56: Figure 1: 2D slope model geometry (
Page 59 and 60: Figure 1. Comparison between the pr
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Proceedings of the 19 th UK Confere
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following anisotropic hardening rel
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that R Γ Spin[N]XdΓ = 0, the func
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4 INCORPORATING EPRCM IN FEA The de
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No distinct yield point is observed
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stress [MPa] 1 0 -1 -2 -3 -2.5 -2 -
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ecomes available, the material mode
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where ∂fin ∂UM force 2.5 2 1.5
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Practicallly, the perturbation fiel
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3 SIMULATING CONCRETE MESO-STRUCTUR
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¯K i is an approximation of the co
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h = 5.36 matrix 4.3 z P E f νf 0.9
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From the total hoop strainε θ , t
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3 EXTERIOR POINT ESHELBY BASED CRAC
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is applied uniformly on the edge to
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(a) (b) (c) (d) Figure 1: Influence
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On each subdomain, we then have to
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( i�1) ( i�1) �Un�1 � ε
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� ~ � 1 ψ ~ � � ~ (2) �
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For the case of uni-axial tension,
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3 Numerical results Preliminary num
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The coefficients An cannot be deriv
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The spatial semi-discretisation is
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3 CRITICAL TIME STEP INCREASED WITH
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v/vo 2E-05 1.5E-05 1E-05 5E-06 0 -3
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3 RESULTS AND DISCUSSION Fig. 1a sh
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Model updating from eigenvalue and
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1. If R = ω 2 n, there is no eigen
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F = ´ Ω STv CSv dΩ A = ´ Γ U
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Fig. 3 Wall normal pressure in the
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contact contact (ii). f ≈ f ( d,
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In the analysis of the incident P-w
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elow a certain threshold. In both t
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K/d 2 Effective Permeability 0.0032
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METHOD 2 (Mellor and Herring Type)
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(a) Free Surface Profile from Janos
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2 IMMERSED FLUID SOLVER Consider th
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References [1] R. Mittal and G. Iac
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a second impact on the forward fuse
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Acknowledgement L. Papagiannis is f
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acceptable probability throughout t
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algorithm was then responsible for
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strategy of saving the computationa
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(a) (b) Figure 5. Comparison of (a)
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Thermal load step i i i i Update ,
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Displacement (mm) Conclusions 45 40
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load carrying of the structure to b
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compressive stress field between co
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Unbonded flexible pipes and risers
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Figure 2: (a) Riser configuration (
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Furthermore the total strain varies
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Displacement 14 12 10 8 6 4 2 0 Mem
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As this project was in the conceptu
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kg and additional mass to represent
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1 Step make box 2 Step make cylinde
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element method. The solid model is
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just new element classes) without t
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Fig.4. Frame model and the displace
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capacities to meet with such demand
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esponses. Severe cases are to be co
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2 Numerical results In this section
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the frequency intially increases un
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and F (R) = ⎡ ⎢ ⎣ ... UαT (R
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Merit function g 10 1 10 0 10 -1 10
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2 STRUCTURAL CHARACTERISTICS OF PTM
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Fig. 5. Simplified FE model of a PT
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general the computational results o
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References [1] Ainsworth M, Oden JT
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Error Cause Interpolation Error Ele
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(a) Before Improvement (b) After Im
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een applied to FE fluid flow proble
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Acknowledgements Figure 2: Flowchar
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1 1 ′′ 1 ′′′ 3 ′′ 2
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3 COMBINING SHAPE FUNCTIONS The exp
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electron current). For the case of
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electron concentration (1/cm 3 ) x
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2 CONSERVATION LAW FOR A MOVING CV
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5 NUMERICAL RESULTS A 1-D cellular
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FEM can be found in [3]. In this pa
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h Y 1 0 −1 −2 −3 −4 −5
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applications. The partition of unit
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1.1 1.05 1 0.95 0.9 0.85 0.8 0.75 2
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2 NURBS BASIS FUNCTIONS NURBS are a
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4 RESULTS To illustrate the isoBEM
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290
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1 1 2 { σ ( ξ, s) } = [ D] { ε (
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4.4 Example 4 - A single edge crack
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