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www.beta-cae.com www.beta-cae.com Beam Modeling New Developments Kostas Skolarikis, Vasileios Evangelou May 2019
www.beta-cae.comwww.beta-cae.com
Beam ModelingNew Developments
Kostas Skolarikis, Vasileios Evangelou
May 2019
www.beta-cae.com
Beam Calculations in History
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Cross Section Tool
Integration of BETA in ANSA
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Cross Section Tool
Multicut
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Cross Section Tool
Beam optimization plugin
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Cross Section Tool as a library tool
CST
BETA
ANSA
ANSACST
ANSA
EPILYSIS
META
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Beams in Epilysis – New developements
• Tapered Beams
• Torsional Warping
• PBEAML , PBRSECT
Optimization
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Beams in Meta – New developements
• Rotation Animation
• Stress Recovery
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Major Shortcomings of current Algorithms
• Multimaterial
sections
• Composite beams
• Spot welded beams
• Missing results
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New FE algorithm
Takes into account the cut’s underlying
mesh
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New FE algorithm
Influence of mesh size on calculated cross section properties
0
0.02
0.04
0.06
0.08
0.1
0.12
0 50 100 150 200 250
Pe
rce
nt
de
viat
ion
fro
m t
hin
se
ctio
n t
he
ory
Number of Nodes
It
Shear Center
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Beam’s warping dof
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Cross section warping modes
𝑁 𝑀𝑦 𝑀𝑧𝑀𝑥 𝑄𝑦 𝑄𝑧
𝒚
𝐳
𝐱
In-plane warping modes Out-of-plane warping modes
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RSECTBT - A new R-type element
RSECTBTRBE2
(Rigid Body Modes)
m
i
𝑢𝑥𝑖 = 𝑢𝑥
𝑚 + 𝑎1𝜃𝑦𝑚 + 𝑎2𝜃𝑧
𝑚 + 𝑎3𝑠𝑤𝑚
A new EPILYSIS element for beam to shell/solid connection
Rigid body motion Torsional warping
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RSECTBT
Connecting nodes are always placed on cross section’s plane
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RSECTBT - Verification
RBE3
RBE2
RSECTBT
+240%
-48%
-2%
+230%(+240%)
+230%(-48%)
-3%(-2%)
Testing RSECTBT against other R-type elements
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0
0.5
1
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2.5
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3.5
1
SHELLS
RBE2
RBE3
RSECTBT
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60
1 2 3 4 5 6 7 8 9
Hz
Elastic mode
Normal modes
SHELLS
RBE2
RBE3
RSECTBT
RSECTBT - Verification
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Beyond 7th dof
Cross section warping modes of non-uniform beams
Dynamic warping modes
Torsional warping mode
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Superelements
Integrated solutions in ANSA and
META
➢ Dynamic Reduction of Subsystems
➢ Spot Welds representation
Latest developements
➢ Full support in Epilysis
➢ Script support
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Superelements in beam modeling
SE model FE model Beam model
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What is the future of beams in CAE ?
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Thank you
