# HP 50g User Manual Page 222

Graphing calculator.

The equation is
strain in the x-direction,
in the directions of the x-, y-, and z-axes, E is Young's modulus or modulus of
elasticity of the material, n is the Poisson ratio of the material,
expansion coefficient of the material, and T is a temperature increase.
Suppose that you are given the following data:
and
= 500 psi, E = 1200000 psi, n = 0.15,
zz
To calculate the strain e
‚Ï@@OK@@
‚O
At this point follow the instructions from Chapter 2 on how to use the Equation
Writer to build an equation. The equation to enter in the Eq field should look
like this (notice that we use only one sub-index to refer to the variables, i.e., e
is translated as ex, etc. -- this is done to save typing time):
Use the following shortcuts for special characters:
:
~‚s
and recall that lower-case letters are entered by using ~„ before the letter
key, thus, x is typed as ~„x.
Press `to return to the solver screen. Enter the values proposed above into
the corresponding fields, so that the solver screen looks like this:
1
e
[
n
xx
xx
E
,
, and
xx
yy
use the following:
xx
Access numerical solver to solve equations
Access the equation writer to enter equation
:
(
)]
yy
zz
, are the normal stresses on the particle
zz
xx
~‚a
T
,
here e
xx
is the thermal
= 2500 psi,
yy
o
= 0.00001/
F, T = 60
~‚c
is the unit
=1200 psi,
o
F.
xx
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