Materials Subgroup

This is the page about the Materials Subgroup. This is info about how we test different materials to understand bulk properties.

1) Read Chapters 1-3 of Gosline Mechanical Design of Structural Materials in Animals.

After chapter 2, do a measurement of stress-strain for a rubber material on ELLA. https://docs.google.com/document/d/147oCsNJrbAPl2sZjDC3pIhCg4dQ4eqpxUtKVTgz7GvY/edit?usp=drive_link

2) Read Section 6.1 of Brinson and Brinson Polymer Engineering Science and Viscoelasticity.

3) Recoil papers

Ilton et al Soft Matter 2019

Zheng et al unpublished

4) RSA G2 DMA (Dr. Wobbles) SOP.

5) Read senior thesis Martin Gonzalez and Anita Chen

6) Review concepts of stress and strain and how the Young’s modulus of a material relates to the spring constant in Hooke’s law.

7) Arrange a time with Mark to talk through spring properties (part 1). (about 1 hour)

8) Derive \(v_{to}\), \(a_{max}\), \(\Delta t\), and \(P_{max}\) as a function of \(E\), \(A\), \(L\), \(\rho\), and \(\epsilon\) for uniaxial extension.

9) Talk through spring properties (part 2) with Mark.

10) Read Ilton et al Soft Matter 2019. What are some possible next directions that follow up on this work?

11) Read Cai et al Advanced Materials 2015. What are some advantages and unique features of this chemistry/architecture? In case you need it, here is the supplementary info to Cai et al.

12) Read Vatankhah-Varnosfaderani et al Nature 2017. What is the “biological triangle”? What network parameters do they modify? How do these parameters affect the material properties (\(E\), \(\lambda_\mathrm{max}\))?

13) You’re ready to get started! See the document Summer 2022 Materials Team Projects.pdf and then check out the “posmlab/Polymers” shared Google Drive (read the README.md files!) and then talk to Mark and the other members of the team about first steps.