EMA 630 Viscoelastic Solids class

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Viscoelasticity research   Demonstrations   Viscoelasticity Book outline '09   Project ideas   Composites   Biomechanics   Ultrasonics
Rod Lakes, University of Wisconsin

EMA 630: Viscoelastic solids class, University of Wisconsin
class stuff animated droop
Time and place: Offered, Fall 2003, 2005, 2007, 2009, 2011, 2013, 2015. Typical offering: every other year. Planned for fall 2017.
Schedule for Fall 2017. TuTh 11:00AM - 12:15PM, ENGR HALL 2349. 700 credit is possible; more advanced homework and projects are involved. Final quiz ~~ Sat. 12/16/2017, 2:45PM- 4:45PM.

Textbook: R. S. Lakes, Viscoelastic Materials, Cambridge University Press, May 2009; ISBN 978 0 521 88568 3 Viscoelastic Materials book outline

Ferry, J. D., Viscoelastic Properties of Polymers
Ward, I. M. and Hadley, D. W., Mechanical Properties of Solid Polymers

Coordinator: Rod Lakes, Professor of Engineering

Prerequisites: Mechanics of materials, such as the following.
EMA 303 or ME 306 or BME 315 and senior or graduate status; or else EMA 506 advanced strength of materials or equivalent (such as tissue biomechanics BME 615).
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Description: Linear theory of viscoelasticity; non-aging materials; Boltzmann superposition principle; linear functionals; thermodynamic foundations; time-temperature superposition principle; boundary and initial value problems. Applications of viscoelastic materials are to be examined in connection with vibration damping, relaxation of stress in fasteners, creep, droop, and sag in structural members, sound absorption, creep buckling, settlement of foundations, tire mechanics, aircraft materials, and shock attenuation.

Goals: To prepare seniors and graduate students to do advanced analysis and design using materials such as polymers and composites with time and frequency dependent viscoelastic properties or to do research with polymers, composites or biological materials; development of physical insight.

Grading: Grading is based on exams, a project report, and on homework. The scale is 90-100% - A; 85-89% AB; 80-84% B... Reports and homework must be in paper form, not electronic. Report and homework grades will be reduced by 5% per working day (excluding weekends, break, holidays) of additional delay.
The final exam is scheduled in central site and will be announced.

Electronics: Bring a calculator to quizzes. Use phones and laptops outside class only.

Interdisciplinary aspects
Engineering mechanics: All materials exhibit some viscoelastic response. Therefore understanding of elastic response should be supplemented with understanding of viscoelastic response. Materials used in aircraft and spacecraft have viscoelastic response.
Biomedical engineering: Tissues in the body are all viscoelastic. Most tissues exhibit large viscoelastic effects. These effects influence the performance of the tissue.
Materials science: Viscoelasticity results from physical processes such as dislocation motion, grain boundary slip, molecular motions, domain motion, or diffusion. Viscoelasticity is of use as a probe into such processes.
Mechanical engineering: Viscoelastic materials are used for control of vibration in machinery. Viscoelastic damping of materials can reduce noise. Creep and relaxation of materials can affect their performance in machinery.
Civil engineering: Viscoelasticity of soil and other earth materials is relevant to settlement of buildings.
Electrical engineering: Viscoelasticity in piezoelectric materials gives rise to energy dissipation, phase angles, and frequency dependence of properties. Vibration control in computer disk drives improves their performance.

"For a successful technology, reality must take precedence over public relations, for Nature cannot be fooled", Richard Feynman.