High Strain Rate Testing and Modeling of Solid Polymers
Two-Day, In-Person Training Class
Foams, elastomers, and other polymers are often exposed to high strain rates and impact events. Due to the strain-rate dependence of these materials it is important to have accurate experimental data in order to select and calibrate a suitable material model. In this class we will demonstrate the use of Split Hopkinson bar tests and traditional uniaxial tests, and also provide hands-on exercises for how to use the experimental data to calibrate suitable material models. All experiments will be performed in the same lab as the class.
Jorgen S. Bergstrom, Ph.D.
Dr. Bergstrom is a Principal Engineer at Veryst Engineering, LLC, and consults primarily in the modeling, testing, and failure analysis of mechanical behavior of polymer materials. He is the author of Mechanics of Solid Polymers: Theory and Computational Modeling, a comprehensive book that explains how solid polymers behave, how they can be experimentally characterized, and how to predict their behavior in different load environments.
Dr. Bergstrom received his Ph.D. from M.I.T. in the area of computational polymer mechanics, and has lectured in the Department of Mechanical Engineering at M.I.T.
This training class is intended for people with some experience either performing experiments or running a finite element program. The examples presented in class will use the finite element programs Abaqus and ANSYS. The material models presented in the class are available for almost all commercial FE codes.
By the end of the class you will be able to:
- design a relevant high strain rate experimental test program for a new polymer material. Know what experimental tests are necessary and sufficient for material model calibration
- know the strengths and weaknesses of various material models with respect to predicting both the slow and high strain rate response
- use experimental data to calibrate the selected material model, and perform impact simulations using an FE code
Veryst will provide a free one-month license to the MCalibration® software and the PolyUMod® Library of user-material models to all class registrants who do not have an active software license. It is not necessary to have Abaqus, ANSYS, COMSOL Multiphysics, LS-DYNA, or MSC.Marc installed for the class. Printed training class notes will be provided. Notes are for personal use, and cannot be modified, shared or redistributed
- Review of polymer mechanics
- Modern mechanical testing of polymers. Overview of different experimental testing techniques for different polymer classes
- High rate testing techniques for stiff polymers
- High strain rate testing techniques for soft elastomers and foams
- Elasticity/hyperelasticity: review of hyperelastic models
- Review of viscoelasticity theory: strength and limitations of linear viscoelasticity
- Review of metal plasticity theory: strengths and limitations of metal plasticity models
- User-material models in Abaqus and ANSYS, including advanced viscoplastic constitutive models incorporating rate and temperature dependence
- Advanced finite element simulations of different classes of polymers
- Material parameter extraction techniques using MCalibration and the PolyUMod library of user material models
To register for the October 22-23, 2020 High Strain Rate Testing and Modeling of Solid Polymers in-person class:
Use our on-line registration form (see below) or print out this page and submit by one of the following:
Scan and email to: email@example.com
Fax to: 781.433.0933
- Veryst Engineering
- 47A Kearney Road
- Needham, MA 02492
The fee for this two-day course is $1900.
Deadline for registration is: Thursday, October 15, 2020.
Registration after this date will incur a late registration fee of $400.
Veryst reserves the right to reject registrations and to cancel a training class based on class size. A full refund will be made if a class is canceled. If a participant cancels a registration more than 5 days before the class, then an 80% refund will be given. There is no refund for cancellations during the last 5 days before the class.