Design and Analysis of Composite Material Structures using SAMCEF.

Design and Analysis of Composite Material

Structures using SAMCEF

Design and Analysis of Composite Material

Structures using SAMCEF

• Composite Materials Structural Analysis : Specific problems

• SAMCEF basic capabilities• Key features • Case studies• SAMCEF Field 3.3 open and interactive

environment

SAMCEF for Composite Materials AnalysisSAMCEF for Composite Materials Analysis

• 구 성

High degree of anisotropy

Composite Materials Structural Analysis : Specific ProblemsComposite Materials Structural Analysis : Specific Problems

Low secondary strength

- Laminate, Sandwich 로 인한 물성치에 대한 특이성

- Material = Viscoelastic- 복합재 구조물의 단점은 2 차 방향에 대한 취약한 강도를 지님 , 방향에 대한 정확한 응력의 크기 추정

Important volume of operations at pre- and post-Important volume of operations at pre- and post-processing stages processing stages

Transverse loads need to be accurately estimatedTransverse loads need to be accurately estimated

임계의 임계의 33D D 층간 사이의 응력 상태의 층간 사이의 응력 상태의 정확한 예측을 위해 필요정확한 예측을 위해 필요

No plastic adaptation

Composite Materials Structural Analysis: Specific ProblemsComposite Materials Structural Analysis: Specific Problems

효율적인 시각화 기능을 효율적인 시각화 기능을 포함한 전포함한 전 -- 후처리 절차에 대한 후처리 절차에 대한 필요필요

광범위의 테이터 및 실제 크기의 구조물에 대한 결과 과정

- 복합재 Shell 은 응력집중에 대하여 매우 민감함

- Material property, Ply thickness, Orientation.

Basic CapabilitiesBasic Capabilities

• 구조 해석의 광범위한 다양성

• 두드러진 전 - 후처리 절차

• 특정의 다겹의 요소에 대한 포괄적인 라이버러리

- Data generation : Visualization of plies, laminate , materials, fibers orientation,..

- Result analysis : ply by ply stress/strain recovery, safety margins, failure criteria,…

특정의 다겹의 요소에 대한 포괄적인 라이버러리

Uni- or Multi-directional laminates

Filament Winding

Sandwich constructions

Basic CapabilitiesBasic Capabilities

Basic CapabilitiesFilament winding dedicated elements Basic CapabilitiesFilament winding dedicated elements

• 기본적인 2D 및 일반화된 축 대칭 요소 (quad. and tria.)

• 솔리드 및 쉘 요소에 대한 Fourier series 확장

• 솔리드 및 쉘 요소에 대한 다중의 조화 Fourier series ; 비선형 해석에 대한 강력한 기술의 확장 Fourier 분해 방법

• Membrane elements• 2D 평면 및 일반화된 평면 인장 요소• Thin shell elements (Kirchhoff)• Thick shell elements (CLT)• 3D solid elements• Thin walled beam elements

Basic CapabilitiesLaminated structures Basic CapabilitiesLaminated structures

• 쉘 요소에서의 가로축의 전단 변형 (Mindlin)

• 구부러진 단면의 경우에 대한 두드러진 3D 모델링 기법

Basic CapabilitiesSandwich constructions Basic CapabilitiesSandwich constructions

- When composite data assign to these model, the classical lamination theory(CLT) allow to model

-변형 후에 쉘 구조물은 종종 warping 단면에 대한 결과를 보여줌 . -고전 적층판 이론이 더 이상 필요 없는 3 차원 모델 고려

• Optimization (BOSS : topology, shape and size)

• Linear static analysis, Modal analysis, Transient response, Linear and incremental stability, Non- linear static, dynamic and kinematics analyses.

• 복합재 재료 해석에 대한 SAMCEF 의 특수 기능은 모든 구조 해석 모듈과 통합되어 있다 .

Basic CapabilitiesWide variety of structural analysesBasic CapabilitiesWide variety of structural analyses

• Max. strain, Max. stress, Tsai-Hill, Tsai-Wu, HASHIN• User’s defined.

Basic CapabilitiesMaterially non-linear analysesBasic CapabilitiesMaterially non-linear analyses

파괴 이론

Fibers-matrix 조립에 대한 전진하는 손상

• Partial degradation : transverse matrix cracking.• Totals degradation : fibers break.

Laminates Filament winding

Plies, lay-ups, assignment to 3D Plies, lay-ups, assignment to 3D mesh (draping simulation)mesh (draping simulation)

Angles, thickness and materials Angles, thickness and materials sequences, assignment to 2D sequences, assignment to 2D

models (meridian plane)models (meridian plane)

AnalysisAnalysis

Results recovery by ply Results recovery by ply numbernumber

Results recovery by layer indexResults recovery by layer index

Material propertiesMaterial properties

Basic CapabilitiesDedicated pre- & post-processingBasic CapabilitiesDedicated pre- & post-processing

Basic CapabilitiesDedicated pre-processingBasic CapabilitiesDedicated pre-processing

•Material properties

•Individual plies creation (matl, angle, thickness, ply ids)

•Laminates creation (ordered stacking sequence of individual plies)

•Laminates assignment to F.E. mesh

사용자는 다음에 대한 상호 작용적인 요소 확인 및 환경에 대한 쉬운 정의를 내릴 수 있다 :

• Elastoplastic, Viscoelastic, Viscoplastic

• Hyperelastic (Mooney, Hart-Smith, Ramberg-Osgood, ..)

• Law of mixture (Hill - Hashin) :

• Linear elastic (isotropic, orthotropic or generally anisotropic)

Basic CapabilitiesDedicated pre-processingComprehensive material models library

Basic CapabilitiesDedicated pre-processingComprehensive material models library

• “Four materials” model for shell element.

• User’s defined


개별적인 Ply 생성

(matl, angle, thickness, ply id.)

Laminates definition (ordered stacking of individual plies)

작업과정의 시뮬레이션 (fibers 방향성의 자동적인 배분 ).


Progressive distribution operating mode

Projection operating mode

특별한 후 - 처리 절차

• Ply by ply results recovery (stress/strains/failure criteria)

• Critical ply selection (comprehensive range of failure theories)

• 손상 분포 (failure indices)

Basic CapabilitiesDedicated post-processingBasic CapabilitiesDedicated post-processing

Basic Capabilities. Dedicated post-processingBasic Capabilities. Dedicated post-processing

Spherical shell – Failure criteria

Basic CapabilitiesDedicated post-processingBasic CapabilitiesDedicated post-processing

Spherical shell – Failure criteria

• Layer(shell) 에 대한 Local 의 평형 상태나 자유 물체 다이어그램 ( 축 대칭 요소 ) 에 기초한 Inter-laminar 에 대한 응력 계산

• Multilayered 에서 monolayered 으로의 격자 재 생성 능력 (2D and 3D)

주요 특징주요 특징

• 접착성 물질에 대한 수정된 Von-Mises elastoplastic 모델

• Definition of filament winding functions (=(z))

Z

F(z)

주요특징 ( 계속 )주요특징 ( 계속 )

- User defined Function

• Homogenization of cyclic periodic materials


- 주기적 물성치에 대한 균질화

- Microscopic level 에 대하여 균등 ( 혹은 평균적 ) 물성치 사용 전체적인 구조물 해석

- Global 결과 기준 Local stress/strain 해석을 수행

• 2D and 3D zero-thickness interface elements


-두 인접한 plies 사이에 stress 전달을 하는 균질의 Resin 으로 표현 , Zero thickness

• 분해적인 모델에 기초한 파괴 역학 및 손상 역학


Windpower blade (Kenetech)

Examples of industrial case studiesExamples of industrial case studies

America 3


F.E model of a TGV composite car (SNCF, ALSTHOM)


ARIANE 5 component detail

CompositesElastomer

Metal


Composite pipeline optimization

(COMPOPT EU project)

• Glass-reinforced filament wound epoxy pipelines used in gas distribution networks.

• Internal dia. : 101 mm• Operating pressure : 70 bar• (safety factor on burst pressure : 4.5)

Examples of industrial case studiesComposite pipeline optimization


Examples of industrial case studiesComposite pipeline optimization


Composite Material Properties

Pipeline Design Loads

Case studiesComposite pipeline optimization


Case studiesComposite pipeline optimization


Objective : minimize mass.

Constraint : strength ratio (R) higher than 1.

Variables : layers thickness and winding angles

Case studiesComposite pipeline optimization(COMPOPT EU project)

Case studiesComposite pipeline optimization(COMPOPT EU project)

SAMCEF

B O

S S

Case studiesComposite pipeline optimization (COMPOPT EU project)

Case studiesComposite pipeline optimization (COMPOPT EU project)

Winding Angle and Thickness Optimization

• Stiffness components = fn (sin4, cos4) : multiple local minima

selection of Globally Convergent Method (GCM)

GCM Optimized Thickness ( 4.7 / 2.9 / 2.5 / 3.4)

Case studiesComposite pipeline optimizationCase studiesComposite pipeline optimization

Winding Angle and Thickness Optimization (GCM)

GCM optimized winding angles [54/-53/55/-58]

Case studiesComposite pipeline optimizationCase studiesComposite pipeline optimization

Winding Angle and Thickness Optimization

GCM optimized winding angles [54/-53/55/-58] Closed to expected optimum values (+/- 55).

TSAI-WU strength ratio vs winding angle

Case studiesComposite pipeline optimization Case studiesComposite pipeline optimization

SAMCEF Field 3.3 open and interactive environment for composite material

structures analyses.

SAMCEF Field 3.3 open and interactive environment for composite material

structures analyses.

Specific functions

• Analysis data

Composite shell behavior

SAMCEF Field 3.3 for compositesSAMCEF Field 3.3 for composites

Specific functions

• Analysis data

Composite Viewer for plies and laminates creation


Specific functions

• Analysis data

Polar plots of in-plane and flexural stiffness


Specific functions

• Analysis data

Laminates assignment to CAD geometry


Specific functions

• Analysis data

Composite Hatchback


Specific functions

• Analysis data

Catamaran Composite Hull


Specific functions

• Analysis data

Checking local stacking sequence


Specific functions

• Results processing

Most critical areas over the structure


Specific functions

• Results processing

Local analysis of most critical plies


Design and Analysis of Composite Material Structures using SAMCEF.

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