function varargout = untitled1(varargin)
% UNTITLED1 MATLAB code for untitled1.fig
% UNTITLED1, by itself, creates a new UNTITLED1 or raises the existing
% H = UNTITLED1 returns the handle to a new UNTITLED1 or the handle to
% the existing
function varargout = demo6(varargin)
% DEMO6 MATLAB code for demo6.fig
% DEMO6, by itself, creates a new DEMO6 or raises the existing
% H = DEMO6 returns the handle to a new DEMO6 or the handle to
% the existing singleton*.
Boeing engineers suspect a presence of fatigue crack on the fuselage of
Boeing 737 airplane but couldnt see it visually. The crack, even though it is
too small to be seen by naked eyes, could lead to a catastrophic failure.
Design an experiment to detect
FORMAT FOR ALL HOMEWORK
Equation for distributed load is
given by w(x) =4x lb/ft2
PROBLEM STATEMENT: Determine the resultant internal loadings (reactions) acting on the
cross-section at point B (see Figure
Stress Concentration Factors and Combined Loading
COMBINING STRESSES WHEN SUBJECTED TO MULTIPLE LOADS
First, we note the following:
Suppose a stress component, xx1, is calculated at a point P due to a loading, Q1. Then
suppose we remove Q1 and then app
VON MISES YIELD CRITERION
Define effective stress, eff, by the equation
(p1 p2 )2 + (p2 p3 )2 + (p3 p1 )2
Define distortion energy, Ud, by the equation;
Ud = (1 + )/3E (eff)2
Then, the uniaxial value for Ud at yielding in a tensile bar is given b
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
(Note that the area, A(z), is a function of distance z. However, the area function actually
CANCELS due to its presence in the top and bottom of the integrand. This is why the
author did not take time to define the functional form for the area
ENGR 290 Thermo I
Spring Term 2003
Open book, one formula sheet.
75 minutes. 100 total points, 5 problems.
( 20 points)
1. Answer the following briefly:
A. Describe the difference between a control volume and a system.
B. Determine th