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Panel
Wiki Markup
{alias:crank} {panel}

Author:

Rajesh

Bhaskaran,

Cornell

University {color:#ff0000}{*}Problem Specification{*}{color} [1.

University

Problem Specification
1. Start-up

and

preliminary

set-up

|ANSYS 11 - Crank Step 1] [


2.

Specify

element

type

and

constants|ANSYS 11 - Crank Step 2] [

constants
3.

Specify

material

properties|ANSYS 11 - Crank Step 3] [

properties
4.

Specify

geometry|ANSYS 11 - Crank Step 4] [

geometry
5.

Mesh

geometry|ANSYS 11 - Crank Step 5] [

geometry
6.

Specify

boundary

conditions|ANSYS 11 - Crank Step 6] [

conditions
7.

Solve

\!|ANSYS 11 - Crank Step 7] [

!
8.

Postprocess

the

results|ANSYS 11 - Crank Step 8] [

results
9.

Validate

the results

Note
titleNote Title

The following ANSYS tutorial is under construction.

Problem Specification

A preeminent bicycle company is disappointed with the negative feedback they have received on their latest model, and they have pinpointed the problem to an outdated bicycle crank design that they assumed would still withstand typical loads. To protect their reputation, they have outsourced the task of analyzing the crank to you, providing you with the geometry of the bicycle crank and attached pedal shaft shown below. The dimensions are given in inches. The material they selected has an Young's modulus E=2.8x107 psi and Poisson ratio ν=0.3. 

Image Added

newwindow
Higher Resolution Image
Higher Resolution Image
 results|ANSYS 11 - Crank Step 9]
{panel}

h2. Problem Specification


h4.

A preeminent bicycle company is disappointed with the negative feedback they have received on their latest model, and they have pinpointed the problem to an outdated bicycle crank design that they assumed would still withstand typical loads. To protect their reputation, they have outsourced the task of analyzing the crank to you, providing you with the geometry of the bicycle crank and attached pedal shaft shown below. The dimensions are given in inches. The material they selected has an Young's modulus _E_=2.8x10{^}7^ psi and Poisson ratio _ν_=0.3. 

!crank.jpg!
{newwindow:Higher Resolution Image}https://confluence.cornell.edu/download/attachments/82384572/crankDiagram.jpg?version=1{newwindow}

Using

...

ANSYS,

...

determine

...

the

...

mechanical

...

response

...

due

...

to

...

a

...

load

...

of

...

100

...

lbf

...

applied

...

vertically

...

downward

...

at

...

the

...

end

...

of

...

the

...

pedal

...

shaft

...

as

...

shown

...

in

...

the

...

figure

...

below.

...

Assume

...

that

...

the

...

crank

...

is

...

attached

...

rigidly

...

to

...

a

...

fixed

...

shaft

...

fitted

...

into

...

the

...

hole

...

near

...

the

...

left

...

end

...

of

...

the

...

crank.

...

This

...

means

...

you

...

can

...

constrain

...

the

...

surface

...

of

...

the

...

left

...

hole

...

in

...

X

...

,

...

Y

...

and

...

Z

...

directions

...

as

...

indicated

...

below.

...

Image Added

Calculate the deflection,

...

strain

...

and

...

stress

...

distributions

...

in

...

the

...

crank/pedal

...

shaft

...

combination

...

for

...

this

...

loading

...

condition.

...

Use

...

the

...

ANSYS

...

results

...

to

...

evaluate

...

the

...

degree

...

of

...

stress

...

concentration

...

in

...

the

...

vicinity

...

of

...

the

...

cut-out

...

in

...

the

...

crank

...

geometry.

...

Go

...

to

...

Step

...

1:

...

Start-up

...

and

...

preliminary

...

set-up

...

See and rate the complete Learning Module

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