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Beam ModelingNew Developments

Kostas Skolarikis, Vasileios Evangelou

May 2019

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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

1.5

2

2.5

3

3.5

1

SHELLS

RBE2

RBE3

RSECTBT

0

10

20

30

40

50

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