ask-the-experts_Composites_in_MAPDL

ANSYS, Inc. Proprietary © 2009 ANSYS, Inc. All rights reserved.
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Sept 31, 2009 Inventory #
Layered composites
Matrix- A homogenous base material that forms the bulk of a composite material layer. Fibers- Bonded or embedded reinforcing fibers that are usually responsible for the anisotropy of the composite.
– /GRAPHICS,POWER (on by default) – /ESHAPE,1
– It supports up to 250 layers within a single element. – Each layer may be a different material with a different orientation.
[-45 / 45 / 0 / 45 / -45]
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ANSYS, Inc. Proprietary © 2009 ANSYS, Inc. All rights reserved.
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Sept 31, 2009 Inventory #
Basic Post-processing Features
Training Manual
• When any global or local coordinate system is used for plotting results, element shapes may be turned on.
For 1-D modeling For 2-D modeling SHELL181 SHELL281 SHELL208 SHELL209 For 3-D modeling For reinforcing modeling REINF264 REINF265
BEAM188 BEAM189 ELBOW290
Training Manual
– Complex material properties and orientations.
– Ply re-sequencing and adjustment of ply properties.
ε x 1/E x ε ν /E y yx y εz νzx /E z ε xy 0 ε yz 0 ε xz 0
Layered SOLID185 Layered SOLID186 Layered SOLSH190
• All above elements are capable of finite strains and support birth-and-death, stress stiffening, initial stress application, and nonlinear stabilization.
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ANSYS, Inc. Proprietary © 2009 ANSYS, Inc. All rights reserved.
ANSYS, Inc. Proprietary © 2009 ANSYS, Inc. All rights reserved.
Laminate- A stack of lamina joined together in arbitrary directions, referred to as a composite lay-up.
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Sept 31, 2009 Inventory #
Challenges
• A versatile composite lay-up building tool is required to account for:
– Many plies each with different geometrical and material attributes.
• Hyperelasticity, Viscoelasticity and Creep
– User material – More …
Elasticity Plasticity Hyperelasticity Visco elast Visco plast Other
CHABOCHE
188,189 290 181,281 208,209 185,186 190 264,265
GURSON
Iso, Ortho
ELASTIC
PLASTIC
AHYPER
SDAMP
PRONY
CREEP
HYPER
NLISO
SHIFT
USER
CAST
RATE
ANEL
MISO
MKIN
KINH
BISO
CDM
BKIN
SMA
HILL
EDP
BB
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Sept 31, 2009 Inventory #
Element Attributes
Maximum Stress Tsai-Wu
Training Manual
ANSYS, Inc. Proprietary © 2009 ANSYS, Inc. All rights reserved.
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Sept 31, 2009 Inventory #
ANSYS Composite Elements
Ask the Experts
FE Analysis of Composite Materials in ANSYS Mechanical APDL 12
ANSYS, Inc. Proprietary © 2009 ANSYS, Inc. All rights reserved.
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Sept 31, 2009 Inventory #
– Composites with long continuous reinforcing fibers
• usually appear in layered forms of reinforced resin
• In this webinar, we will concentrated on composites with long fibers.
1/E y νzy /E z 0 0 0
symm 1/E z 0 0 0 1/G xy 0 0
1/G yz 0
1/G xz
σ x σ y σz σ xy σ yz σ xz
ANSYS, Inc. Proprietary © 2009 ANSYS, Inc. All rights reserved.
Training Manual
• Because of non-isotropy, orientation of the element coordinate system is essential for obtaining accurate results.
MP,EX, #, Ex MP,EY, #, Ey MP,EZ, #, Ey MP,PRXY,#, xy MP,PRYZ,#, yz MP,PRXZ,#, xy MP,GXY, #, Gxy MP,GYZ, #, Gyz MP,GXZ, #, Gxy FC,#,S,XTEN, x FC,#,S,XCMP,-x FC,#,S,YTEN, y FC,#,S,YCMP,-y FC,#,S,ZTEN, y FC,#,S,ZCMP -y FC,#,S,XY, yx FC,#,S,YZ, il FC,#,S,XZ, il
Forms of composites
• Forms of composites
– Composites with short reinforcing fibers or particles
• Metal matrix • Ceramic matrix • Resin matrix
Training ManualANSYS, Inc. Proprietary © 2009 ANSYS, Inc. All rights reserved.
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Sept 31, 2009 Inventory #
ANSYS Composite Elements
Training Manual
Shell Beam/Pipe/Elbow Layered Solid
Solid-Shell
Discrete/Smeared Reinforcement
ANSYS, Inc. Proprietary © 2009 ANSYS, Inc. All rights reserved.
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Sept 31, 2009 Inventory #
Material support
• Extensive nonlinear material library