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<!DOCTYPE HTML>
<html lang="en-US">
<head>
<title>OpenHertz (𝛽)</title>
<meta charset="UTF-8" />
<link rel="icon" type="image/jpg" href="pics/favicon.jpg" />
<link rel="stylesheet" href="styles.css">
<!-- <script type="text/javascript" src="scripts.js"></script> -->
</head>
<body onload="updateResults()">
<h1>OpenHertz</h1>
<p>
Welcome to OpenHertz v 0.0.6 a Free Hertzian contact calculator.
If there are any issues please report them on <a href="https://github.com/Foadsf/OpenHertz" target="_blank"
rel="noopener noreferrer">the GitHub
repository</a>.
</p>
<form>
<fieldset>
<legend>Geometry</legend>
<style type="text/css">
.tg {
border-collapse: collapse;
border-spacing: 0;
}
.tg td {
border-color: black;
border-style: solid;
border-width: 1px;
font-family: Arial, sans-serif;
font-size: 14px;
overflow: hidden;
padding: 10px 5px;
word-break: normal;
}
.tg th {
border-color: black;
border-style: solid;
border-width: 1px;
font-family: Arial, sans-serif;
font-size: 14px;
font-weight: normal;
overflow: hidden;
padding: 10px 5px;
word-break: normal;
}
.tg .tg-zv4m {
border-color: #ffffff;
text-align: left;
vertical-align: top;
min-width: 350px;
width: 400px;
}
.tg .tg-8jgo {
border-color: #ffffff;
text-align: center;
vertical-align: top
}
</style>
<table class="tg" style="width:100%">
<thead>
<tr>
<th class="tg-zv4m">
<p>
<label>Contact type</label>
<!-- <select id="contactTypeList" onchange="document.getElementById('contactType').src = this.value"> -->
<select id="contactTypeList" value="1" onchange="contactTypeFun(this.value)">
<!-- <option value="pics/SpherePlane.PNG">Sphere - Plane</option>
<option value="pics/SphereSphere.PNG">Sphere - Sphere</option>
<option value="pics/CylinderPlane.PNG">Cylinder - Plane</option> -->
<option value="1">Sphere - Plane</option>
<option value="2">Sphere - Sphere</option>
<option value="3">Cylinder - Plane</option>
<option value="4">Cylinder - Cylinder</option>
<option value="5">Elliptical</option>
</select>
</p>
<p id="orientationList" style="display: none">
<label>Orientation</label>
<!-- <select onchange="document.getElementById('contactType').src = this.value"> -->
<select id="OrientationSelector" onchange="orientationFun(this.value)">
<!-- <option value="pics/CylinderCylinderPerpendicular.PNG">Perpendicular</option>
<option value="pics/CylinderCylinderParallel.PNG">Parallel</option> -->
<option value="1">Perpendicular</option>
<option value="2">Parallel</option>
<!-- <option>Angled</option> -->
</select>
</p>
</th>
<th class="tg-8jgo" rowspan="2">
<p style="text-align:center;">
<!-- <img src="pics/SpherePlane.PNG" alt="Contact type" height="200"> -->
<img id="contactType" src="pics/SpherePlane.PNG" alt="Contact type" height="200">
</p>
</th>
</tr>
<tr>
<td class="tg-zv4m">
<p>
<label>First radius <b>R<sub>1</sub></b> (mm)</label>
<input title="Please enter a positive number" id="firstRadius" type="number"
pattern="[0-9]+([\.,][0-9]+)?" step="0.01" min="0" value="10.00"
onchange="updateResults()">
</p>
<p id="secondRadius" style="display: none">
<label>Second radius <b>R<sub>2</sub></b> (mm)</label>
<input title="Please enter a number" id="secondRadiusValue" type="number"
pattern="-?[0-9]+([\.,][0-9]+)?" step="0.01" value="20.00"
onchange="updateResults()">
</p>
<p id="cylinderLength" style="display: none">
<label>Cylinder's length <b>L</b> (mm)</label>
<input title="Please enter a positive number" id="cylinderLengthValue" type="number"
pattern="[0-9]+([\.,][0-9]+)?" step="0.01" min="0" value="30.00"
onchange="updateResults()">
</p>
</td>
</tr>
</thead>
</table>
</fieldset>
<fieldset>
<legend>Load</legend>
<p id="Force">
<label>Normal force <b>F</b> (N)</label>
<input title="Please enter a positive number" id="forceValue" type="number"
pattern="[0-9]+([\.,][0-9]+)?" step="0.01" min="0" value="20.00" onchange="updateResults()">
</p>
</fieldset>
<fieldset>
<legend>Material</legend>
<!-- <p>
<label>Same materials</label>
<select id="myList">
<option value="1">yes</option>
<option value="2">no</option>
</select>
</p> -->
<p>
<style type="text/css">
.tg {
border-collapse: collapse;
border-spacing: 0;
}
.tg td {
border-color: black;
border-style: solid;
border-width: 1px;
font-family: Arial, sans-serif;
font-size: 14px;
overflow: hidden;
padding: 10px 5px;
word-break: normal;
}
.tg th {
border-color: black;
border-style: solid;
border-width: 1px;
font-family: Arial, sans-serif;
font-size: 14px;
font-weight: normal;
overflow: hidden;
padding: 10px 5px;
word-break: normal;
}
.tg .tg-baqh {
text-align: center;
vertical-align: top
}
.tg .tg-73oq {
border-color: #000000;
text-align: left;
vertical-align: top;
min-width: 170px;
width: 200px;
/* max-width: 200px; */
}
.tg .tg-6qw1 {
background-color: #c0c0c0;
text-align: center;
vertical-align: top
}
.tg .tg-y6fn {
background-color: #c0c0c0;
text-align: left;
vertical-align: top
}
</style>
<table class="tg" style="width:100%">
<thead>
<tr>
<th class="tg-73oq"></th>
<th class="tg-6qw1">First material</th>
<th class="tg-6qw1">Second Material</th>
</tr>
</thead>
<tbody>
<tr>
<td class="tg-y6fn">Young's modulus <b>E</b> (GPa)</td>
<td class="tg-baqh"><input id="firstElastic" title="Please enter a positive number"
type="number" value="200" pattern="[0-9]+([\.,][0-9]+)?" step="1" min="0"
onchange="updateResults()"></td>
<td class="tg-baqh"><input id="secondElastic" title="Please enter a positive number"
type="number" value="200" pattern="[0-9]+([\.,][0-9]+)?" step="1" min="0"
onchange="updateResults()"></td>
</tr>
<tr>
<td class="tg-y6fn">Poisson's ratio <b>𝜈</b></td>
<td class="tg-baqh"><input id="firstPoisson" title="Please enter a positive number below 0.5"
type="number" value="0.3" pattern="[0-9]+([\.,][0-9]+)?" step="0.01" min="0" max="0.5"
onchange="updateResults()"></td>
<td class="tg-baqh"><input id="secondPoisson" title="Please enter a positive number below 0.5"
type="number" value="0.3" pattern="[0-9]+([\.,][0-9]+)?" step="0.01" min="0" max="0.5"
onchange="updateResults()"></td>
</tr>
<tr>
<td class="tg-y6fn">Yield strength <b>σ<sub>Y</sub></b> (MPa)</td>
<td class="tg-baqh"><input title="Please enter a positive number" type="number" value="400"
pattern="[0-9]+([\.,][0-9]+)?" step="1" min="0"></td>
<td class="tg-baqh"><input title="Please enter a positive number" type="number" value="400"
pattern="[0-9]+([\.,][0-9]+)?" step="1" min="0"></td>
</tr>
</tbody>
</table>
</p>
</fieldset>
<fieldset>
<legend>Results</legend>
<p>
<style type="text/css">
.tg {
border-collapse: collapse;
border-spacing: 0;
}
.tg td {
border-color: black;
border-style: solid;
border-width: 1px;
font-family: Arial, sans-serif;
font-size: 14px;
overflow: hidden;
padding: 10px 5px;
word-break: normal;
}
.tg th {
border-color: black;
border-style: solid;
border-width: 1px;
font-family: Arial, sans-serif;
font-size: 14px;
font-weight: normal;
overflow: hidden;
padding: 10px 5px;
word-break: normal;
}
.tg .tg-uqo3 {
background-color: #efefef;
text-align: center;
vertical-align: top
}
.tg .tg-baqh {
text-align: center;
vertical-align: top
}
.tg .tg-c3ow {
border-color: inherit;
text-align: center;
vertical-align: top
}
.tg .tg-kftd {
background-color: #efefef;
text-align: left;
vertical-align: top
}
.tg .tg-0lax {
text-align: left;
vertical-align: top
}
.tg .tg-y698 {
background-color: #efefef;
border-color: inherit;
text-align: left;
vertical-align: top;
min-width: 240px;
width: 260px
}
</style>
<table class="tg" style="width:100%">
<thead>
<tr>
<th class="tg-0lax"></th>
<th class="tg-uqo3">Value</th>
<th class="tg-uqo3">Equation</th>
</tr>
</thead>
<tbody>
<tr id="effectiveRadius" style="display: none">
<td class="tg-y698">Effective radius <b>R<sub>*</sub></b> (mm)</td>
<td class="tg-c3ow" id="effectiveRadiusValue"></td>
<td class="tg-c3ow">
<p style="text-align:center;">
<img src="pics/effectiveRadius.svg" alt="Effective radius" height="40">
</p>
</td>
</tr>
<tr>
<td class="tg-y698">Effective Elasticity <b>E<sub>*</sub></b> (GPa)</td>
<td class="tg-c3ow" id="effectiveElasticityValue"></td>
<td class="tg-c3ow">
<p style="text-align:center;">
<img src="pics/effectiveElasticity.svg" alt="Effective elasticity" height="40">
</p>
</td>
</tr>
<tr id="pointContact">
<td class="tg-y698">Radius of the contact area <b>a</b> (𝜇m)</td>
<td class="tg-c3ow" id="contactRadius"></td>
<td class="tg-c3ow">
<p style="text-align:center;">
<img src="pics/conactRadiusSphere.svg" alt="Contact radius" height="60">
</p>
</td>
</tr>
<tr id="lineContact" style="display: none">
<td class="tg-y698">Half contact width <b>b</b> (𝜇m)</td>
<td class="tg-c3ow" id="contactWidth"></td>
<td class="tg-c3ow">
<p style="text-align:center;">
<img src="pics/conactWidth.svg" alt="Contact width" height="60">
</p>
</td>
</tr>
<tr>
<td class="tg-y698">Total deformation <b>d</b> (𝜇m)</td>
<td class="tg-c3ow" id="indentation"></td>
<td class="tg-c3ow">
<p style="text-align:center;">
<img id="indentationPicture" src="pics/indentationSphere.svg" alt="total displacement"
height="40">
</p>
</td>
</tr>
<tr>
<td class="tg-kftd">Max contact pressure <b>P<sub>max</sub></b> (MPa)</td>
<td class="tg-baqh" id="maximumPressure"></td>
<td class="tg-baqh">
<p style="text-align:center;">
<img id="maxPressurePicture" src="pics/maxPressureSphere.svg" alt="Maximum pressure"
height="40">
</p>
</td>
</tr>
<!-- <tr>
<td class="tg-kftd">Safety factor <b>SF</b></td>
<td class="tg-baqh"></td>
<td class="tg-baqh"></td>
</tr> -->
</tbody>
</table>
</p>
<p>
<style type="text/css">
.tg {
border-collapse: collapse;
border-spacing: 0;
}
.tg td {
border-color: black;
border-style: solid;
border-width: 1px;
font-family: Arial, sans-serif;
font-size: 14px;
overflow: hidden;
padding: 10px 5px;
word-break: normal;
}
.tg th {
border-color: black;
border-style: solid;
border-width: 1px;
font-family: Arial, sans-serif;
font-size: 14px;
font-weight: normal;
overflow: hidden;
padding: 10px 5px;
word-break: normal;
}
.tg .tg-uqo3 {
background-color: #efefef;
text-align: center;
vertical-align: top
}
.tg .tg-baqh {
text-align: center;
vertical-align: top
}
.tg .tg-kftd {
background-color: #efefef;
text-align: left;
vertical-align: top
}
.tg .tg-0lax {
text-align: left;
vertical-align: top;
min-width: 240px;
width: 260px
}
</style>
<table class="tg" style="width:100%">
<thead>
<tr>
<th class="tg-0lax"></th>
<th class="tg-uqo3">First body</th>
<th class="tg-uqo3">Second body</th>
<!-- <th class="tg-uqo3">Equation</th> -->
</tr>
</thead>
<tbody>
<tr>
<td class="tg-kftd">Max von Mises stress <b>σ<sub>max</sub></b> (MPa)</td>
<td class="tg-baqh" id="firstMises"></td>
<td class="tg-baqh" id="secondMises"></td>
<!-- <td class="tg-baqh">
<p style="text-align:center;">
<img id="maxMisesPicture" src="pics/maxMisesSphere.svg" alt="Maximum von Mises stress" height="40">
<img id="maxMisesPicture" alt="Maximum von Mises stress" height="40">
</p>
</td> -->
</tr>
<tr>
<td class="tg-kftd">Depth max von Mises <b>Z<sub>σ<sub>max</sub></sub></b> (𝜇m)</td>
<td class="tg-baqh" id="firstMisesDepth"></td>
<td class="tg-baqh" id="secondMisesDepth"></td>
<!-- <td class="tg-baqh"></td> -->
</tr>
<tr>
<td class="tg-kftd">Max shear stress <b>𝜏<sub>max</sub></b> (MPa)</td>
<td class="tg-baqh" id="firstShear"></td>
<td class="tg-baqh" id="secondShear"></td>
<!-- <td class="tg-baqh"></td> -->
</tr>
<tr>
<td class="tg-kftd">Depth max shear <b>Z<sub>𝜏<sub>max</sub></sub></b> (𝜇m)</td>
<td class="tg-baqh" id="firstShearDepth"></td>
<td class="tg-baqh" id="secondShearDepth"></td>
<!-- <td class="tg-baqh"></td> -->
</tr>
</tbody>
</table>
</p>
</fieldset>
<fieldset>
<legend>References</legend>
<ol>
<li>Green, Itzhak. "Poisson ratio effects and critical valus in spherical and cylindrical Hertzian
contacts." Applied Mechanics and Engineering 10.3 (2005): 451-462.</li>
</ol>
</fieldset>
</form>
<script type="text/javascript" src="scripts.js"></script>
<!-- <script>
function myFunction() {
document.getElementById('contactType').src = document.getElementById("contactTypeList").value;
}
</script> -->
</body>
</html>