{[ promptMessage ]}

Bookmark it

{[ promptMessage ]}

Thought problem 2011

# Thought problem 2011 - =(σ xx σ yy/2 ½(σ xx σ yy...

This preview shows pages 1–2. Sign up to view the full content.

Thought problem; Suppose you have an equilibrated element as shown below. This one is different, slightly, from the ones we did in class. Here, we know the shear stress on an angled plane, but we do NOT know one of the stresses we typically have…. Here, the unknown stress is σ yy . If we want to determine this stress, we can use our transformation equation in a different way….Consider σ nt (-20 o ) = 70 MPa…… σ nt (-20 o ) = 70 MPa

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

View Full Document
This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: = (σ xx + σ yy )/2 + ½ (σ xx- σ yy ) cos (-40 o ) + σ xy sin (-40 o ) But we also know KNOW σ xx = 20 MPa and σ xy = 40 MPa, so that we can actually SOLVE for the unknown stress σ yy ! In general, such problems are called INVERSE PROBLEMS since we are solving for values that we generally know and hence we have to invert the equation to obtain the value needed. \ 70MPa 40MPa 20MPa σ yy X Y 20 o...
View Full Document

{[ snackBarMessage ]}

### Page1 / 2

Thought problem 2011 - =(σ xx σ yy/2 ½(σ xx σ yy...

This preview shows document pages 1 - 2. Sign up to view the full document.

View Full Document
Ask a homework question - tutors are online