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The fluid pressures and velocities at some selected instants are shown below: Pressure at t = 25.E-6 Pressure at t = 50.E-6 Pressure at t = 100.E-6 Pressure at t = 200.E-6 Pressure at t = 800.E-6 Pressure at t = 1800.E-6 Velocity at t = 25.E-6 Velocity at t = 50.E-6 Velocity at t = 100.E-6 Velocity at t = 200.E-6 Velocity at t = 800.E-6 Velocity at t = 1800.E-6 10
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European Laboratory for Structural
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Proceedings of a Course on: Numeric
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Programme of the Course 1. Introduc
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Credits & Acknowledgments • Struc
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Introductory Example (4) 7 Applicat
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x Computational Framework • Gover
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n+ 1 n ∆t n n+ 1 u = u + ( u + u
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Scheme start-up and marching (2)
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Stress Update • To solve the equi
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Geometric non-linearities (3) Set u
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Essential Boundary Conditions Essen
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Exercise 0 - Ideal ballistics • M
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Exercise 0 - Ideal ballistics (5)
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Exercise 1 - Suspended mass (3) •
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Exercise 1 - Suspended mass (7) •
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Exercise 2 - Wave propagation (4)
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Exercise 3 - Impact on Cooling Towe
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TITLE: PMAT04: motion of projectile
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sinon; tra2 = tra2 et ele; finsi; f
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Some results: horizontal and vertic
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PMAT01E This test is similar to PMA
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Hence: 11 −8 ES 2× 10 ⋅ 2.5×
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The stress history is: Note that th
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Analytical TEST11 Same as TEST01 bu
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Comparison of natural vs. engineeri
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The total external forces at the tw
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TEST13 Same as TEST01 but uses a 10
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The mass returns at the initial pos
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TEST22 To verify the independence o
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Linear dynamic analysis Consider th
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• The two waves f and g propagate
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Analytical solution For the bar imp
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Note that we have also put the Pois
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BARI08 We study the effect of the t
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ENDPLAY *==========================
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BARI10 Same as BARI09 but compares
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The system is initially at rest, an
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CAST MESH TRID NONL LAGR $ $ Dimens
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Final deformation (with superposed
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Detailed Contents • Modeling the
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Modeling the fluid domain • The f
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Euler equations (3) • For a compr
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Time integration Each time incremen
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Time integration (5) 10. Account fo
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Euler Equations (FV) • They are w
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Mesh rezoning - motivations • Rez
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Giuliani’s automatic rezoning •
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• Analytical solution (self-simil
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Shock tube (6) • Influence of pse
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Exercise 2 - Explosion in air-fille
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Exercise 3 - Bubble expansion in a
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Exercise 4 - External blast on two
Page 119 and 120: Geometric data: The calculation is
Page 121 and 122: SHOC01 Eulerian, “average” pseu
Page 123 and 124: COUR 7 'ro_a' ECRO COMP 2 ELEM LECT
Page 125 and 126: Analytical Conclusion: the pseudo-v
Page 127 and 128: SHOC13 Eulerian, very low pseudo-vi
Page 129 and 130: Analytical General conclusions: •
Page 131 and 132: The inverse path is not so straight
Page 133 and 134: The input files (mesh generation by
Page 135 and 136: Geometric data: The calculation is
Page 137 and 138: COUR 1 'dx_4' DEPL COMP 1 NOEU LECT
Page 139 and 140: TANK02 Eulerian solution: the whole
Page 141: The final pressure distribution is:
Page 144 and 145: TUBE06 Lagrangian solution: the who
Page 146 and 147: And the final velocity distribution
Page 148 and 149: The computed displacements are: To
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Page 153 and 154: Geometric data: External blast in a
Page 155 and 156: abs4 = dall (p4 d 28 p4u) (p4u d 40
Page 157 and 158: Geometric data: Internal blast in a
Page 159 and 160: air = air1 ET air2 ET air3 ET air4
Page 161 and 162: COURBE 8 'P e_p12' ECROU COMP 1 lec
Page 163 and 164: 3D axisymmetric simulation: JWLS3G
Page 165: point lect 1 term elem lect 1 term
Page 170 and 171: Further FSI Example Electric arc in
Page 172 and 173: FSI Motivation (2) Fully coupled an
Page 174 and 175: Permanent FSI treatment (2) • Upo
Page 176 and 177: Geometrically complex cases • Bil
Page 178 and 179: The FSA algorithm (2) • Effect of
Page 180 and 181: The UP algorithm The method simply
Page 182 and 183: Application to Finite Volumes • T
Page 184 and 185: Exercise 2 - Explosions in simple d
Page 186 and 187: Exercise/Example 3 - Wave propagati
Page 188 and 189: Exercise/Example 4 - CONT problem T
Page 190 and 191: Exercise/Example 4 - CONT problem (
Page 192 and 193: Exercise/Example 6 : Woodward-Colel
Page 194 and 195: Exercise/Example 7 : Exfs Test (Com
Page 196 and 197: Exercise/Example 8 : Steam Explosio
Page 198 and 199: Exercise/Example 9 Explosion in Sec
Page 200 and 201: Boundary Condition Elements: CLxx
Page 202 and 203: Boundary Condition Elements: CLxx (
Page 204 and 205: Exercise/Example 12 - Sloshing (Cou
Page 206 and 207: Spectrum at point P5 Exercise/Examp
Page 208 and 209: Exercise/Example 12 - Sloshing (9)
Page 213 and 214: Geometric data: For the fluid domai
Page 215 and 216: ECHO RESU ALIC TEMP GARD PSCR SORT
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The displacements of the horizontal
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0.00000E+00 7.11050E+00 1.06860E+00
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scen geom navi free !vect scco scal
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Alternative 2 Use multi-phase multi
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Geometric data: Complex shell-like
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At 0.5 ms, spurious (non-physical)
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Here is an example of the computed
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DIME PT2L 293 PT3L 70 ZONE 3 ED41 3
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2.10000E+01 8.33330E+00 2.10000E+01
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FLUT RO 2.4278E3 EINT 0. GAMM 0.75D
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The final mesh (colors indicate mat
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GRIL LAGR LECT stru TERM ALE LECT f
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The final bubble material mass frac
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Geometric data: Materials The explo
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Some results: global deformed mesh
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The well-known Woodward-Colella tes
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Numerical Solutions WOCO2D The mesh
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ECHO * RESU ALIC GARD PSCR * SORT G
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The EUROPLEXUS input file reads: WO
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This example is a patch of four sho
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CONT SPLA NX 1 NY 0 NZ 0 LECT symx
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TITLE: Cavi51: steam explosion in a
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p10p=p10 plus p0; p11=0.75 0 1.7; p
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*opti donn 5; * vol3=vol2 syme plan
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si (nn2 ega 1); str2=ei; sinon; str
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The EUROPLEXUS input file reads: CA
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Some results: final pressure distri
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TITLE: PPLA04: unsteady flow throug
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liq2=daller c1 c2 c3 c4 plan; lag=l
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Some results: final fluid pressure:
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PROBLEM: A deformable tank complete
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s1 = p5 d 4 p9; s2 = p9 d 16 p12; s
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The final pressure distribution in
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RESULTS: Linear theory predicts a 1
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The velocity at 200 ms is presented
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compute a reasonable initial distri
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FSA LECT 2 3 4 5 6 7 8 9 10 11 12 1
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$ $ $ 91 92 93 94 95 96 97 98 99 10
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The computed displacements of the t
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TITLE: OILCUP2: uniformly accelerat
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2526 2527 2528 2529 2530 2531 2532
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Intermediate and final oil mass fra
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Detailed contents • ALE descripti
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Example 1 - Taylor bar impact 7 Exa
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Example 3 - Coining Bilateral, Plan
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Example 3 - Coining (5) Bilateral,
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Example 4 - Explosion in a 2D box 1
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Example 5 - Explosion in a corridor
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Lagrangian contact • Non-permanen
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Example 6a - Deep drawing A (2) Vel
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Tube Crash (2) 35 Conventional cont
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The Basic Pinball Method [Belytschk
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Hierarchic Pinball Method (2) • H
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Example 7 - Cable impact (2) l L v
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Example 7b - Indentation (4) • 3D
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Example 7b - Indentation (8) • Co
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Why a Particle-Based Method? (2)
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SPH Formulation (4) • To write th
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Bird Strike [Courtesy of Snecma/CEA
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Example 8 - SPH impacts (2) SONA01:
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Spectral Elements (3) • To obtain
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Spectral Elements (7) Coupling betw
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Example 10 - Sediment valley • Ve
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Example 12 - Matsuzaki valley • M
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Time Step Partitioning (2) • Buil
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Time Step Partitioning (6) • This
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Treatment of links in partitioning
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Example 12a - Taylor bar impact rev
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Example 12a - Taylor bar impact rev
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⎧ M1U 1 = F1+ R1 ⎪ ⎨M U = F +
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Coupling at the Interfaces (7) ⎧
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Multiple scales in time • Use app
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Multiple scales in time (5) • The
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Multiple scales in space (3) •
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Example: simplified engine S 1 S 2
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Example: aircraft Material is linea
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Example 13 - Domains in 2D (2) •
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Example 14 - Domains in 3D (3) •
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Geometric data and materials: See s
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sler cam1 1 nfra 20 trac offs fich
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POIN TOUS CHAMELEM FICH TPLO FREQ 1
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* p6=1.2E-2 0; p7=1.2E-2 1.0E-2; *
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COUR 1 'dx_P1' DEPL COMP 1 NOEU LEC
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p4s=p4 plus (0 0); tol=0.001; c1=p1
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The deformed final mesh at 4 ms wit
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The input file: INFS - 02 *--------
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The final mesh and pressures are: T
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ZONE 2 PMAT 2 Q4GS 3904 ECRO 858884
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The final deformed mesh is: The fin
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Problem description: This example i
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LECT die punch holder TERM MASS 0.1
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geom !navi free line heou poin sphp
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An example of intermediate velociti
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LOADING: The indenter is pushed int
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The initial configuration (with par
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The reaction force is: Approximate
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The final velocities: 8
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The initial configuration (with par
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-5.10000E-01 1.33333E+00 2.00000E+0
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Some hardening quantity in the targ
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Final plastic streen in the target
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Final plastic strain in the target:
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Problem description: This example r
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The input file is: HOLE - 06 $ ECHO
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trac 2 1 AXES 1.0 'DISPL. [M]' yzer
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Problem description: This example r
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* fin lab3; nodf=c1p; * tpln=0.0 40
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The input file is: VALL - PS $ ECHO
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The final displacement norm in the
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VEC1=2. 0.; * P1=P11; R1=P13; S1=P1
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S3=P33 PLUS VEC1; * N1=2; N2=3; N3=
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CHPO2=CHPO2 / SCAL1; TSTAT2 . &BCL9
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AXTE 1E3 'Temps (ms)' *------------
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The final displacement field in the
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P9=40. 5. 5.; P14=20. 5. 5.; * BASE
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CLIM1=(P5 ET P6 ET P7 ET P8); CLIM1
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SUIT Post-treatment ECHO RESU ALIC
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The final displacement field in the
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tol=0.01E-3; * base=p0 d 5 p1; stru
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eli=stru elem i; si (ega j 0); sq42
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h3=8.1e-3; h4=16.2e-3; h5=24.3e-3;
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The characteristic displacements in
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The final yield stress field in the
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The mission of the Joint Research C
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