ch. 6 notes

ch. 6 notes - Ch. 6 Mechanical Properties I. States of...

Info iconThis preview shows pages 1–4. Sign up to view the full content.

View Full Document Right Arrow Icon
Ch. 6 Mechanical Properties I. States of Stress A. Simple tension: cable A o = cross sectional Area (when unloaded) F F 1. Stress=F/A0 B. Simple shear: drive shaft M M A o 2R F s A c 1. δ =Fs/A0 2. Sliding stress. Moves along plane C. Simple compression 1. δ =F/A0 D. Bi-axial tension 1.There exists tension on two axes 2.A pressurized air tank is an example E. Hydrostatic compression 1.Pressure exists on all axes 2.Example is a fish underwater
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
II. Elastic Deformation A. Reversible deformation B. The figures below show that if a bar is pulled down and then released the bonds will stretch and then return to normal F δ bonds stretch return to initial C. Elastic deformation exists in both linear and nonlinear states, the return to equilibrium will occur on the same line F δ Linear- elastic Non-Linear- elastic III. Plastic Deformation (metals) A. From figures below metals slide along close packed planes that when the force is released the bonds do not return to normal planes still sheared F δ elastic + plastic bonds stretch & planes shear δ plastic
Background image of page 2
B. The graph of force and displacement shows that the bonds relieve the elastic deformation but the plastic deformation remains F δ linear elastic linear elastic δ plastic IV. Engineering Stress A. Tensile stress is defined as Ft/Ao Area, A F t F t B. Shear stress is defined as Fs/A0
Background image of page 3

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Image of page 4
This is the end of the preview. Sign up to access the rest of the document.

This note was uploaded on 04/24/2008 for the course MSE 209 taught by Professor Kelly during the Fall '08 term at UVA.

Page1 / 9

ch. 6 notes - Ch. 6 Mechanical Properties I. States of...

This preview shows document pages 1 - 4. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online