Stress and strength lecture notes by MIT OpenCourseWare Created 2026-10-24 Updated 2026-11-05
12.005 Applications of Continuum Mechanics to Earth, Atmospheric, and Planetary Sciences, spring 2006, Lecture 10. Traction, frictional strength, pore fluid pressure and Mohr circle construction. These notes use a particular sign convention; conversions must preserve it.
Lecture 26 of 16.346 Astrodynamics, Fall 2008. Pages 1–2 derive the linear relative-motion equations with radial coordinate xi and along-track coordinate eta; page 3 gives their solution using a different axis convention. Institutional attribution follows the PDF masthead.