156B Week 5

Overview of Status of Analysis, Design, Fabrication, Tests, etc.

• • Finishing up baseline analysis

  • Have preliminary list of materials to use for optimization

Accomplishments from Previous Week

• • Presented design proposal presentation

  • Cleaned up CAD model for simulations

  • Generated an FEA simulation of current tool in Solidworks and ANSYS

  • Cleared up how to approach hand calculations

  • Determined that safety factor of optimized design should be >2.5

    • To get a factor of safety of 2.5, the load is around 3750N, or 843lbf

Goals for Next Week (list names after each item). Use specific and measurable objectives.

• • Fix hand calculations with correct moment of inertias (Nathan)

  • Research standards necessary for material selection (Kelly)

  • Look into simulations for composites on ANSYS (Jason)

  • Brainstorm/CAD geometry ideas for optimized designs (Roy)

  • Practice using ANSYS (all)

Sponsor Comments from Last Meeting and Actions Taken to Address these Comments (indicate date of comments and if via email or in person)

• • Guided us on how to clean up model for FEA simulations

  • Notified another design constraint: the envelope on top of the tool cannot be moved since there is a motor placed at the side

Instructor Comments from Last Meeting and Actions Taken to Address these Comments (indicate date of comments and if via email or in person)

• • Clarified that in hand calc, we need to perform the calcs at the point of maximum stress

  • Expressed concern over the validity of loading conditions, given load seems too large

    • Will bring up during next meeting with sponsors

    • Discussed the possibility of normalizing safety factor during optimization

Comments from Other Students in the Class (indicate date of comments and if via email or in person)

• • n/a

Risks and Areas of Concern

• • Validity of loading conditions

  • Validity of hand calculations

Resources or Information Required but not Available

• • How the neutral axes work in hand calculations

  • Clarification of load conditions

Schedule

• • Need to start optimization flowchart by end of week

Budget (list amount spent and amount remaining)

• • n/a

Progress on Report and Webpage

• • Updated weekly report