Abaqus复合材料
相关主题
- 1、下载文档前请自行甄别文档内容的完整性，平台不提供额外的编辑、内容补充、找答案等附加服务。
- 2、"仅部分预览"的文档,不可在线预览部分如存在完整性等问题,可反馈申请退款(可完整预览的文档不适用该条件!)。
- 3、如文档侵犯您的权益，请联系客服反馈,我们会尽快为您处理(人工客服工作时间：9:00-18:30)。
模拟复合材料的真实性能
Abaqus北京代表处
2008年7月
Copyright 2008 SIMULIA, Inc.
概述
• 复合材料被许多工业领域广泛的使用 航空
F1
卫星
火箭
Copyright 2008 SIMILIA, Inc.
潜艇
1
概述
• 复合材料的增强形式有很多种： • 颗粒增强 • 随机分布短纤维 • 单向纤维 • 平面编织 • 三维编织
Copyright 2008 SIMILIA, Inc.
Surface Interaction Properties Define Fracture Mechanics
• Properties (given on data line)
G_IC G_IIC G_IIIC
= Fracture toughness, modes I, II, and III
*CONTACT PAIR, INTERACTION=FRACTURE, ADJUST=Nsetbond Slave--Slave surface name Master--Master surface name
*SURFACE INTERACTION, NAME=FRACTURE, UCRACK, DEPVAR=12, PROPERTIES=16 , G_IC,G_IIC,G_IIIC,mixType,m,n,o w,
name, a, s, f, mat, alpha, 1
Copyright 2008 SIMILIA, Inc.
嵌入单元
• Rebar加强的膜单元和表面单元可以以任意方式嵌入到实体单元中来模拟 复合材料
嵌入的膜单元
rebar
Copyright 2008 SIMILIA, Inc.
实体单元
6
Abaqus复合材料主要功能
• Abaqus/CAE复合材料的定义以及后处理功能 • CATIA CPD的接口 • 高级复合材料模拟技术
Copyright 2008 SIMILIA, Inc.
复合材料定义的界面—Composite Layup
3 2 1
Copyright 2008 SIMILIA, Inc.
7
复合材料定义的界面—Composite Layup
Copyright 2008 SIMILIA, Inc.
IanIlotnentregfarpfcaleacnEeeleeomfleedmnetlsaemnloticnsaalttoeiodcnated along plane of delamination
11
VCCT-for-Abaqus Usage and Keywords
Shell Mesh
Copyright 2008 SIMILIA, Inc.
3
分层的实体单元
• 可以在六面体单元的任意方向定义任意数量的分层
—分层的实体单元计算横向剪切应力的精度不如厚壳单元
• 单元
Solid Mesh
– C3D8I, C3D6
• 属性定义
– *SOLID SEБайду номын сангаасTION, COMPOSITE
14
Fracture Analysis Results
Deflected shape
VCCT Fracture
Copyright 2008 SIMILIA, Inc.
Force level 1 Force level 2 Force level 3
Crack Growth Predictions Correlate Well With Test Observations
• 材料定义
– *ELASTIC, TYPE=ISOTROPIC,
TYPE=ORTHOTROPIC,
TYPE=ANISOTROPIC
Copyright 2008 SIMILIA, Inc.
实体壳单元
• 实体壳单元是三维应力/位移单元，它的响应同壳类似，但是具有实体的拓扑 • 单元
– SC6R，SC8R • 属性定义
– *SHELL SECTION, COMPOSITE，STACKING DIRECTION={1|2|3|orientation}
• 材料定义 – *ELASTIC, TYPE=ISOTROPIC, TYPE=LAMINA
Copyright 2008 SIMILIA, Inc.
4
实体壳单元
• 优势： 实体壳单元可以： • 厚壳和薄壳的应用 • 线形和非线性行为（大变形和弹-塑性材料响应） • 厚度的锥形变化/厚度的逐渐减少 • 利用三维单元划分网格的几何体得到的单元 • 考虑双面接触 • 可以更加精确的模拟复合材料层合结构厚度方向的响应 • 单元可以具有较高的纵横比（面内尺寸和厚度的比值）
Copyright 2008 SIMILIA, Inc.
13
Animation of Deformed Shape from Analysis
Copyright 2008 SIMILIA, Inc.
Animation of Debond Propagation
Copyright 2008 SIMILIA, Inc.
w
= Out-of-plane width for 2D analysis
Copyright 2008 SIMILIA, Inc.
12
Skin-Stringer FEA Model
Displacement imposed at corner nodes
Copyright 2008 SIMILIA, Inc.
Copyright 2008 SIMILIA, Inc.
概述
• 复合材料具有很多的优点： • 制造工艺简单 • 比强度高，比刚度大 • 具有灵活的可设计性 • 耐腐蚀，对疲劳不敏感 • 热稳定性、高温性能好
Copyright 2008 SIMILIA, Inc.
2
Abaqus中复合材料的建模技术
• 根据分析目的的不同，复合材料的建模方式有： • 分层的壳单元 • 分层的实体单元 • 实体壳单元
mixType
( ) = 1 for B-K (2D shown):
G IC
+
G IIC
−
G IC
G IIC
G I
+
G II
m
= 2 for Power law:
G I
G IC
m
+
G II
G IIC
n
+
G III
G IIIC
o
eta
= Coefficient for B-K law
m, n, o = Exponents for mode mixity formula
• 高级的复合材料建模技术包括： • Rebar单元 • 嵌入单元
Copyright 2008 SIMILIA, Inc.
分层的壳单元
• 单元 – S4, S3R
• 属性定义 – *SHELL SECTION, COMPOSITE
• 材料定义 – *ELASTIC, TYPE=ISOTROPIC, TYPE=LAMINA
5
Rebar单元
• 使用方法：
*SHELL SECTION, ELSET=... *REBAR LAYER, ORIENTATION=ORI1
name, a, s, f, mat, alpha, 1
name mat a
s
alpha
f
*SHELL SECTION, ELSET=... *REBAR LAYER, ORIENTATION=ORI1
Copyright 2008 SIMILIA, Inc.
9
Advanced Simulation Capabilities • Manufacturing and Draping Analysis • Ballistic impact on unidirectional composite • Barely Visible Impact Damage (BVID) • Woven fabric composite beam crush • Composite plate post-buckling behavior • Skin-stringer debonding using VCCT • Delamination using cohesive elements • Z-pinned composite failure
Copyright 2008 SIMILIA, Inc.
Courtesy Boeing
10
Abaqus VCCT Capability Developed by Boeing for Fracture Analysis of Composite Aerospace Structures
• The VCCT-for-Abaqus technology was developed by Boeing Commercial Aircraft Group as part of the Composite Affordability Initiative (CAI)
Abaqus approach is surface based • Extension of ∗DEBOND • Automatic (inherent) modeling of post failure contact
Delamination plane paved with surface based contact pair
• Based on Linear Elastic Fracture Mechanics (LEFM) concepts • Based on computing the energy release rates for normal and shear crack-tip deformation modes • Compare energy release rates to interlaminar fracture toughness
• Abaqus was selected by Boeing to commercialize this capability
Copyright 2008 SIMILIA, Inc.
Virtual Crack Closure Technique (VCCT)
• VCCT • Has been used manually in the aerospace industry for many years
Contact surfaces defined for region of fracture
To Simulate the Test, Center Region of Nodes Are Initially Debonded
Crack tip
Initially debonded nodes
Initially bonded nodes
FFraractcutruerememcheacnhicasniinctserifnatceerface eelelemmenetnstcsocntoronltrgorol wgtrhowofth of ddeelalmaminaintiaotnioinntoinnteownmewatemriaal terial
Copyright 2008 SIMILIA, Inc.
复合材料的后处理功能
Copyright 2008 SIMILIA, Inc.
8
复合材料的后处理功能
• 可以显示复合材料厚度方向上变量 的变化曲线
Copyright 2008 SIMILIA, Inc.
CATIA CPD接口
• Simulayt可以作为Abaqus/CAE的中模块，将CATIA CPD中设计的复合 材料模型以及铺层导入
Copyright 2008 SIMILIA, Inc.
高级的复合材料建模技术—Rebar单元
• 利用Rebar模拟复合材料 • 钢筋混凝土、橡胶轮胎等 • 假设母体和增强结构是完全绑定的
• *REBAR LAYER • 用于模拟壳、薄膜和表面单元中单轴增强结构
Copyright 2008 SIMILIA, Inc.
Copyright 2008 SIMILIA, Inc.
Debonding using VCCT: Analysis of Composite Skin-Stringer Bonded Joint
• VCCT can be applied to determine the global strength and failure mode for typical aerospace composite structures like this skin/stringer panel
Abaqus北京代表处
2008年7月
Copyright 2008 SIMULIA, Inc.
概述
• 复合材料被许多工业领域广泛的使用 航空
F1
卫星
火箭
Copyright 2008 SIMILIA, Inc.
潜艇
1
概述
• 复合材料的增强形式有很多种： • 颗粒增强 • 随机分布短纤维 • 单向纤维 • 平面编织 • 三维编织
Copyright 2008 SIMILIA, Inc.
Surface Interaction Properties Define Fracture Mechanics
• Properties (given on data line)
G_IC G_IIC G_IIIC
= Fracture toughness, modes I, II, and III
*CONTACT PAIR, INTERACTION=FRACTURE, ADJUST=Nsetbond Slave--Slave surface name Master--Master surface name
*SURFACE INTERACTION, NAME=FRACTURE, UCRACK, DEPVAR=12, PROPERTIES=16 , G_IC,G_IIC,G_IIIC,mixType,m,n,o w,
name, a, s, f, mat, alpha, 1
Copyright 2008 SIMILIA, Inc.
嵌入单元
• Rebar加强的膜单元和表面单元可以以任意方式嵌入到实体单元中来模拟 复合材料
嵌入的膜单元
rebar
Copyright 2008 SIMILIA, Inc.
实体单元
6
Abaqus复合材料主要功能
• Abaqus/CAE复合材料的定义以及后处理功能 • CATIA CPD的接口 • 高级复合材料模拟技术
Copyright 2008 SIMILIA, Inc.
复合材料定义的界面—Composite Layup
3 2 1
Copyright 2008 SIMILIA, Inc.
7
复合材料定义的界面—Composite Layup
Copyright 2008 SIMILIA, Inc.
IanIlotnentregfarpfcaleacnEeeleeomfleedmnetlsaemnloticnsaalttoeiodcnated along plane of delamination
11
VCCT-for-Abaqus Usage and Keywords
Shell Mesh
Copyright 2008 SIMILIA, Inc.
3
分层的实体单元
• 可以在六面体单元的任意方向定义任意数量的分层
—分层的实体单元计算横向剪切应力的精度不如厚壳单元
• 单元
Solid Mesh
– C3D8I, C3D6
• 属性定义
– *SOLID SEБайду номын сангаасTION, COMPOSITE
14
Fracture Analysis Results
Deflected shape
VCCT Fracture
Copyright 2008 SIMILIA, Inc.
Force level 1 Force level 2 Force level 3
Crack Growth Predictions Correlate Well With Test Observations
• 材料定义
– *ELASTIC, TYPE=ISOTROPIC,
TYPE=ORTHOTROPIC,
TYPE=ANISOTROPIC
Copyright 2008 SIMILIA, Inc.
实体壳单元
• 实体壳单元是三维应力/位移单元，它的响应同壳类似，但是具有实体的拓扑 • 单元
– SC6R，SC8R • 属性定义
– *SHELL SECTION, COMPOSITE，STACKING DIRECTION={1|2|3|orientation}
• 材料定义 – *ELASTIC, TYPE=ISOTROPIC, TYPE=LAMINA
Copyright 2008 SIMILIA, Inc.
4
实体壳单元
• 优势： 实体壳单元可以： • 厚壳和薄壳的应用 • 线形和非线性行为（大变形和弹-塑性材料响应） • 厚度的锥形变化/厚度的逐渐减少 • 利用三维单元划分网格的几何体得到的单元 • 考虑双面接触 • 可以更加精确的模拟复合材料层合结构厚度方向的响应 • 单元可以具有较高的纵横比（面内尺寸和厚度的比值）
Copyright 2008 SIMILIA, Inc.
13
Animation of Deformed Shape from Analysis
Copyright 2008 SIMILIA, Inc.
Animation of Debond Propagation
Copyright 2008 SIMILIA, Inc.
w
= Out-of-plane width for 2D analysis
Copyright 2008 SIMILIA, Inc.
12
Skin-Stringer FEA Model
Displacement imposed at corner nodes
Copyright 2008 SIMILIA, Inc.
Copyright 2008 SIMILIA, Inc.
概述
• 复合材料具有很多的优点： • 制造工艺简单 • 比强度高，比刚度大 • 具有灵活的可设计性 • 耐腐蚀，对疲劳不敏感 • 热稳定性、高温性能好
Copyright 2008 SIMILIA, Inc.
2
Abaqus中复合材料的建模技术
• 根据分析目的的不同，复合材料的建模方式有： • 分层的壳单元 • 分层的实体单元 • 实体壳单元
mixType
( ) = 1 for B-K (2D shown):
G IC
+
G IIC
−
G IC
G IIC
G I
+
G II
m
= 2 for Power law:
G I
G IC
m
+
G II
G IIC
n
+
G III
G IIIC
o
eta
= Coefficient for B-K law
m, n, o = Exponents for mode mixity formula
• 高级的复合材料建模技术包括： • Rebar单元 • 嵌入单元
Copyright 2008 SIMILIA, Inc.
分层的壳单元
• 单元 – S4, S3R
• 属性定义 – *SHELL SECTION, COMPOSITE
• 材料定义 – *ELASTIC, TYPE=ISOTROPIC, TYPE=LAMINA
5
Rebar单元
• 使用方法：
*SHELL SECTION, ELSET=... *REBAR LAYER, ORIENTATION=ORI1
name, a, s, f, mat, alpha, 1
name mat a
s
alpha
f
*SHELL SECTION, ELSET=... *REBAR LAYER, ORIENTATION=ORI1
Copyright 2008 SIMILIA, Inc.
9
Advanced Simulation Capabilities • Manufacturing and Draping Analysis • Ballistic impact on unidirectional composite • Barely Visible Impact Damage (BVID) • Woven fabric composite beam crush • Composite plate post-buckling behavior • Skin-stringer debonding using VCCT • Delamination using cohesive elements • Z-pinned composite failure
Copyright 2008 SIMILIA, Inc.
Courtesy Boeing
10
Abaqus VCCT Capability Developed by Boeing for Fracture Analysis of Composite Aerospace Structures
• The VCCT-for-Abaqus technology was developed by Boeing Commercial Aircraft Group as part of the Composite Affordability Initiative (CAI)
Abaqus approach is surface based • Extension of ∗DEBOND • Automatic (inherent) modeling of post failure contact
Delamination plane paved with surface based contact pair
• Based on Linear Elastic Fracture Mechanics (LEFM) concepts • Based on computing the energy release rates for normal and shear crack-tip deformation modes • Compare energy release rates to interlaminar fracture toughness
• Abaqus was selected by Boeing to commercialize this capability
Copyright 2008 SIMILIA, Inc.
Virtual Crack Closure Technique (VCCT)
• VCCT • Has been used manually in the aerospace industry for many years
Contact surfaces defined for region of fracture
To Simulate the Test, Center Region of Nodes Are Initially Debonded
Crack tip
Initially debonded nodes
Initially bonded nodes
FFraractcutruerememcheacnhicasniinctserifnatceerface eelelemmenetnstcsocntoronltrgorol wgtrhowofth of ddeelalmaminaintiaotnioinntoinnteownmewatemriaal terial
Copyright 2008 SIMILIA, Inc.
复合材料的后处理功能
Copyright 2008 SIMILIA, Inc.
8
复合材料的后处理功能
• 可以显示复合材料厚度方向上变量 的变化曲线
Copyright 2008 SIMILIA, Inc.
CATIA CPD接口
• Simulayt可以作为Abaqus/CAE的中模块，将CATIA CPD中设计的复合 材料模型以及铺层导入
Copyright 2008 SIMILIA, Inc.
高级的复合材料建模技术—Rebar单元
• 利用Rebar模拟复合材料 • 钢筋混凝土、橡胶轮胎等 • 假设母体和增强结构是完全绑定的
• *REBAR LAYER • 用于模拟壳、薄膜和表面单元中单轴增强结构
Copyright 2008 SIMILIA, Inc.
Copyright 2008 SIMILIA, Inc.
Debonding using VCCT: Analysis of Composite Skin-Stringer Bonded Joint
• VCCT can be applied to determine the global strength and failure mode for typical aerospace composite structures like this skin/stringer panel