American Society For Composites

The Student Simulation Challenge

Welcome

The Fifth (2017) ASC Simulation Challenge
The theme for the Fifth (2017) American Society for Composites Student Simulation challenge is energy absorbing materials design. The challenge is to design an internal morphology for a composite material with rigid and flexible constituent polymer materials. The design must be producible with a Polyjet printer, S tratasys Objet 350 Connex 3 (https://goo.gl/GPrSnl). Teams must use simulation-driven methodologies to design a microstructure that maximize the energy absorbed from a drop weight. They must also demonstrate the ability to predict the impact load-displacement response. The area under the force displacement curve will be denoted as the absorbed energy. Only the first impact event is considered in the energy absorption calculations. Energy absorbed in subsequent re-impacts from a bouncing weight will be ignored.

The morphology must be in the form of a repeated unit cell of 10 mm x 10 mm x 10 mm in size. The teams must design a 30x30x30 mm cube structure (with 3x3x3 =27 repeated cells in the structure) and submit it for printing. All prints will be produced at the Prototype Object Fabrication Lab @ Stevens Institute of Technology at no cost to the teams. The printed cube will then be drop weight tested at North Carolina State University or NYU Tandon School of Engineering. The force-displacement relationship obtained from the experiment will be compared with the predictions submitted in the report. The winners are determined based on the rubric determined by the organization team.

  • The cube will be impacted by a 5 Kg drop weight striking it at 4m/s.
  • More information about the printer, Objet 350 – Connex 3 can be found here.
  • Teams can use any modeling and simulation theory, software tools or analytical models.
  • The geometry can be created with any CAD tool. Autocad Meshmixer can be used for constructing the cube structure from repeated cells. Read more: Here
  • File format required for printing is a multi-body STL file.
  • Stratasys has tutorials here
  • The palette to be used in the challenge has three materials: VeroBlackPlusTM (RGD875), a rigid opaque material; VeroClearTM (RGD810) – standard clear material; TangoBlackPlusTM /TangoPlusTM (FLX980 and FLX930) – Rubbery Material
  • Full palette details are here:
  • Support material will be SUP 706 - details are here
  • If you have questions about the printing, contact Kishore.Pochiraju@stevens.edu

Prizes

First Prize - $1000
Second Prize - $500

Challenge Rules

  • All members of the team must be students currently enrolled in an undergraduate or graduate program at a 4-year college or university.
  • Teams can contain a maximum of four (4) students
  • All students must be current members of ASC. Membership is included with the conference attendance. Student memberships are $15 per year.
    http://www.asc-composites.org/membership.htm
  • At least one team member must attend the conference – Check the Website
  • Teams can be formed with students from multiple colleges/universities.
  • Teams can consult with advisors and mentors. However, the teams must affirm in writing that the submission are based on their own and original work.
  • All teams are responsible for getting access to software and other necessary resources.
  • There are no restrictions on the type of the model and choices of simulation software or data resources.

Complete Challenge Description Download from here.

What to do and when?

  • Step 1 Register: Registration begins June 1, 2017 --- Closes August 15th, 2017
  • Step 2 Announce: Teams must have a public webpage that describes – team name; team members and a short abstract of the approach – describe tools used - and any other information they wish to share publicly by August 22, 2017.
  • Step 3 Submit: Designed part must be submitted for printing and testing
    No later than September 15th, 2017. Upload link will be provided to registered teams.
  • Step 4 Report: Final report submission is due at the conference: October 22, 2017 (Noon) - Via email of download link or attachment to kishore.pochiraju@stevens.edu
Evaluation Rubric

  • [30 Points] Absorbed Energy / Highest Absorbed Energy of all entries
  • [30 Points] Prediction - Predicted Energy / Experimentally determined Energy
  • [40 Points] Design methodology, simulation tools used – reporting
  • [5 Points] Statement of innovation in microstructural design. Why is your design innovative?
  • [10 Points] Role and effective use of simulations in materials design: Approach, technical details of constitutive relationships, homogenization theories used – 10 points
  • [25 Points] Descriptions of simulated load-displacement curve for the drop weight test, simulation boundary and initial conditions, computational details, correlation with experimentally observed test data, highlight how the simulation shows that the planned innovative ideas have been incorporated into the microstructural design.
  • Challenge Organization Team

    N. Gupta - NYU Tandon School of Engineering
    E. Iarve - Univ. of Texas at Arlington
    D. Mollenhaur - AFRL, WPAFB.
    M. Pankow - NCSU
    K. Pochiraju - Stevens Institute of Technology
    ( Contact Information )