GLG310 Structural Geology Todays plan Continue Force, Stress,

GLG310 Structural Geology Todays plan  Continue Force, Stress,

GLG310 Structural Geology Todays plan Continue Force, Stress, and Strength (Chapter 3) [continue reading Chapter 3] Be sure to cross reference the lecture and the textbook February 27, 2020

GLG310 Structural Geology Force, Stress, and Strength Introduction Dynamic analysis Force Tractions (stress simply)

Stress Relationships between stress and strain Deformation experiments February 27, 2020 GLG310 Structural Geology Stress simply Simple definition of stress (for the moment) =

pressure =Force/Area February 27, 2020 Stress simply Stress = Force/Area = N/m2 = Pascal = Pa Blaise Pascal, was a French mathematician, physicist, inventor, writer and Christian philosopher. Pascal's earliest

work was in the natural and applied sciences where he made important contributions to the study of fluids, and clarified the concepts of pressure and vacuum. Pascal also wrote in defense of the scientific method. Born: June 19, 1623, Clermont-Ferrand Died: August 19, 1662, Paris (Wikipedia)

Stress and deformation Use your stress and deformation words correctly: Stress Deformation (strain) Tension Extension Compression

Contraction or shortening -watch out for Art Sylvester!

Ray Mine AZ: rocks come from depth overburden Tractions and stress Replace effect of adjacent rocks with forces Rock

quarried from the earth Tractions and stress A more strict definition of stress Traction is stress relative to a surface through a point p. Stress tensor is the field of tractions

acting over a point p. Stress field is the entire collection of stress tensors in a body. February 27, 2020 GLG310 Structural Geology Tractions and stress Start with equilibrium (Newtons 3rd

Law): Resolve each into its components in the coordinate directions February 27, 2020 GLG310 Structural Geology

Tractions and stress Total torque must vanish February 27, 2020 GLG310 Structural Geology Tractions and stress Sign Conventions: compression positive

In many engineering situations, we consider tension as positive and compression negative. This is not usually the case in structural

geology. -Fundamentals of Rock Mechanics by Jaeger and Cook (3rd ed., p. 10) Normal vector: unit length, perpendicular to plane A polygon and two of its normal vectors

A normal to a surface at a point is the same as a normal to the tangent plane to that surface at that point. A vector field of normals to a surface Tractions and stress (a) Traction or Stress vector (b) Equilibrium

Cauchys relationship (c) Components of the Traction Vector Baron Augustin-Louis Cauchy (21 August 1789 23 May 1857) was a French mathematician who was an early pioneer of analysis. He started the project of

formulating and proving the theorems of infinitesimal calculus in a rigorous manner. A profound mathematician, Cauchy exercised a great influence over his contemporaries and successors. His writings cover the entire range of mathematics and mathematical physics. More concepts and theorems have been named for Cauchy than for any other mathematician (in elasticity alone there are sixteen concepts and theorems named for Cauchy).

February 27, 2020 GLG310 Structural Geology Equilibrium February 27, 2020

GLG310 Structural Geology Multiple sources of stress February 27, 2020 GLG310 Structural Geology Stress tensor

Stress tensor February 27, 2020 Stress tensor

Recently Viewed Presentations

  • Presentation-standard


    A long-term international migrant, is someone who does not change his or her usual residence for a period of at least a year. ONS long term migration estimates are based only on: people who come to the UK and who...
  • Multi-potentiality


    Social and Emotional Needs of Gifted Students Component 4 of the Competencies Collaboration SEVA Council of Gifted Coordinators References Ford, D., Grantham, T., & Whiting, G. (2008).
  • OOC Project 30.07.14

    OOC Project 30.07.14

    Transforming Care The Mansell Report 1993 and revised. Valuing People 2001. Valuing People Now 2009. Aims. A Personalised Approach. To make sure needs are met & individual's are receiving high quality care. ... OOC Project 30.07.14 Last modified by:
  • DB-2 -

    DB-2 -

    This slide transitions back to the "tuning your statements" sub-topic! This example is overly simplistic but it makes the point!! Example also shows how can specify constant for non-leading index component to get first row only in joining data. This...
  • CSE 190: Internet E-Commerce

    CSE 190: Internet E-Commerce

    Arial Default Design CSE 190: Internet E-Commerce Lecture 2 HTML HTML Basics HTML Example 1 HTML Example 2 HTML Example 3 Uniform Resource Locators HTML Forms Style Sheets HTML Style Sheets Style Sheet References Scripting within HTML Javascript References
  • What You Need to Know About the False

    What You Need to Know About the False

    , April 28, 2014, S.D. Texas (Two University professors indicted for false statements and wire fraud) Arklight, February 4, 2015, E.D. Pennsylvania (Indictment for wire fraud, using university resources, company not real)

    Costing studies are cumbersome. Few links between cost and performance. ... For example, we see here that the total volume of throughput managed and the total number of doses delivered during the study year was vastly different for our participates....
  • Corrosion And Its Control

    Corrosion And Its Control

    (i) Sacrificial anodic protection method. In this method, the metallic structure to be protected is made cathode by connecting it with more active metal (anodic metal). Hence, all the corrosion will concentrate only on the active metal. The artificially made...