presentation summary design and optimization group n.
Download
Skip this Video
Loading SlideShow in 5 Seconds..
Presentation Summary: Design and Optimization Group PowerPoint Presentation
Download Presentation
Presentation Summary: Design and Optimization Group

Loading in 2 Seconds...

play fullscreen
1 / 12

Presentation Summary: Design and Optimization Group - PowerPoint PPT Presentation


  • 81 Views
  • Uploaded on

Presentation Summary: Design and Optimization Group. NSF/DOE/APC Workshop: The Future of Modeling in Composites Molding Processes June 9-10, 2004. Vision. Material Design. The development and implementation of a comprehensive composites design environment

loader
I am the owner, or an agent authorized to act on behalf of the owner, of the copyrighted work described.
capcha
Download Presentation

PowerPoint Slideshow about 'Presentation Summary: Design and Optimization Group' - sevilen


An Image/Link below is provided (as is) to download presentation

Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author.While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server.


- - - - - - - - - - - - - - - - - - - - - - - - - - E N D - - - - - - - - - - - - - - - - - - - - - - - - - -
Presentation Transcript
presentation summary design and optimization group

Presentation Summary:Design and Optimization Group

NSF/DOE/APC Workshop:

The Future of Modeling in Composites Molding Processes

June 9-10, 2004

vision
Vision

Material Design

The development and implementation of a

comprehensive composites design environment

that generates the geometric configuration,

component materials, and processing

schedule for industrial products. Design

tool to be based on validated simulations,

and address uncertainty in the product’s

use, its processing, and models used to

assess each, and provide desirable

performance over its entire life cycle.

Process Design

Product Design

Composite Design Attributes

Usability

Extendibility

Durability

Dimensional stability

Reliability

Manufacturability

Serviceability

Recycle ability

Disposability

etc…

cradle

to

grave

length

scale

product process design example
Product/Process Design Example

mold filling

fiber orientation

material properties

product performance

Integrated product and process design for short fiber reinforced polymer composites

  • Stiffness and strength defined by fiber direction during manufacturing
  • IPPD enabling technologies

polymer

melt flow

analysis

mold

filling

simulation

thermal

stress

analysis

mold

cooling

analysis

modal

analysis

multidisciplinary

design

methodologies

design

sensitivity

analysis

structural

optimization

numerical

optimization

static

stress

analysis

warpage

simulation

material

property

calculation

fiber

orientation

prediction

state of the art
State of the Art

f(u1, u2)

pdf

u1

u2

MPP

g=0

  • Numerous software / algorithms available for numerical optimization
    • VDoc/DOT, ISight, Hyperopt, LMS Optimus, Dakota,

IMSL, Excel, Matlab, IMSL, Minpack, etc….

  • Structural optimization well established
    • Sizing, Shape, and Topology
  • Metamodeling techniques reduce cost of simulation-based design
  • Enterprise-Driven Multidisciplinary Design Optimization (MDO) developed for niche applications, e.g., aeroelasticity, automotive body structure, etc…
  • Non-deterministic approaches address uncertainty

in design

    • Reliability Analysis Methods, Robust Design,

Reliability-Based Design, etc…

  • Optimization and design sensitivity analysis

methods developed for numerous manufacturing

applications

perceived gaps
Perceived Gaps
  • Common language needed across materials scientists, product designers, manufacturing process engineers, etc.
  • Validated models needed for all aspects of composites processing
    • E.g., strength and stiffness prediction from flow simulation
  • Design sensitivities not developed to level of analyses
    • Fiber orientation
    • Mechanical properties from process models
    • Non-isothermal flow, reactive flow
  • Integrated design methodologies not available to end user
  • Optimal design applications are task or discipline focused
    • I.e., Multidisciplinary design methods rarely not applied to composite molding problems
  • Nondeterministic approaches not applied to composite molding problems
future research
Future Research
  • Further develop/validate composite molding process/product models and validate optimization results
  • Development of language/representations for seamless communication
  • Efficient optimization methods that incorporate multidisciplinary variable-fidelity simulation models
  • Development of a user-oriented composites molding design environment
    • Incorporate design knowledge and experience
    • Further develop DSA methods for composites molding
    • Incorporate multidisciplinary design methodologies
    • Incorporate design under uncertainty tools
    • Include process control in optimal process design
  • Application / Validation on industrial scale problems under distributed and collaborative design environment
slide8

2. Identify “defects” or “features” of interest for modeling and design - porosity - texture - interface imperfections - fiber clustering - fiber misalignment

3 develop metamodels expressing the effect of microstructure on performance or properties
3. Develop “metamodels” expressing the effect of microstructure on “performance” or “properties”

Multi-scale modeling and topology optimization

experimental modeling approach
Experimental/modeling approach
  • Evolve from experimentally-based empirical models  physics-based models
  • Reduce number of experiments required to validate models
  • Length scales for homogenization
some specific topics
Some Specific Topics
  • Micromechanics
    • Process micromechanics: Effects of fiber content, length on the rheology and fiber orientation
    • Micromechanics of materials: Homogenization accounts for interaction between constituents and defects
  • Continuum mechanics: Need of constitutive models for
    • Fatigue
    • Time dependent behaviors (creep, relaxation,..)
    • Impact
    • Moisture
    • Crashworthiness
  • Nonlinear behaviors
    • Minimization of damage
    • Improvement of durability (fatigue, creep)