Tittle: Stress analysis of a wire being bent.
Model :
Connections:
Contact a) frictional : Wire to Lever
b) frictional : wheel to wire
Joints a) Body to ground revolute joint : Lever
Mesh :
Model (A4) > Mesh
| Object Name |
Mesh |
| State |
Solved |
| Display |
| Display Style |
Body Color |
| Defaults |
| Physics Preference |
Mechanical |
| Relevance |
0 |
| Sizing |
| Use Advanced Size Function |
Off |
| Relevance Center |
Coarse |
| Element Size |
Default |
| Initial Size Seed |
Active Assembly |
| Smoothing |
Low |
| Transition |
Fast |
| Span Angle Center |
Coarse |
| Minimum Edge Length |
3.14160 mm |
| Inflation |
| Use Automatic Inflation |
None |
| Inflation Option |
Smooth Transition |
| Transition Ratio |
0.272 |
| Maximum Layers |
5 |
| Growth Rate |
1.2 |
| Inflation Algorithm |
Pre |
| View Advanced Options |
No |
| Patch Conforming Options |
| Triangle Surface Mesher |
Program Controlled |
| Patch Independent Options |
| Topology Checking |
No |
| Advanced |
| Number of CPUs for Parallel Part Meshing |
Program Controlled |
| Shape Checking |
Standard Mechanical |
| Element Midside Nodes |
Program Controlled |
| Straight Sided Elements |
No |
| Number of Retries |
Default (4) |
| Extra Retries For Assembly |
Yes |
| Rigid Body Behavior |
Dimensionally Reduced |
| Mesh Morphing |
Disabled |
| Defeaturing |
| Pinch Tolerance |
Please Define |
| Generate Pinch on Refresh |
No |
| Automatic Mesh Based Defeaturing |
On |
| Defeaturing Tolerance |
Default |
| Statistics |
| Nodes |
8455 |
| Elements |
4332 |
| Mesh Metric |
None |
Model (A4) > Mesh > Mesh Controls
| Object Name |
Patch Conforming Method |
Face Sizing |
Face Sizing 2 |
| State |
Fully Defined |
| Scope |
| Scoping Method |
Geometry Selection |
| Geometry |
3 Bodies |
4 Faces |
1 Face |
| Definition |
| Suppressed |
No |
| Method |
Tetrahedrons |
|
| Algorithm |
Patch Conforming |
|
| Element Midside Nodes |
Use Global Setting |
|
| Type |
|
Element Size |
Sphere of Influence |
| Element Size |
|
2.2 mm |
0.8 mm |
| Behavior |
|
Soft |
|
| Sphere Center |
|
Coordinate System |
| Sphere Radius |
|
7. mm |
Results:
Equivalent stress in the Wire:
Equivalent strain in wire:
Animation:
https://drive.google.com/open?id=1kdv2aUCyCNO4aF0LNa8oNuo7r-W_QIqV
Comparison table :
|
Sr No.
|
Material
|
Equivalent stress(MPa)
|
Equivalent strain
|
|
1.
|
Copper alloy
|
397.53
|
0.004683
|
|
2.
|
Aluminum alloy
|
313.31
|
0.004429
|
|
3.
|
Magnesium alloy
|
268.83
|
0.007594
|
Inference:
From the above table it is seen that magnesium showed highest strain which suggests that it was stretched the most in the process of bending. Stress is the resistace a body offers when put under loading. From the table most stress was offered by copper alloy which tells that copper is the hardest to bend.And its strain was the least which tells us that it wasn\'t stretched as Magnesium alloy.
In the analysis forces were not specified but rotation of the wheel was. So the program was free to apply required forces to rotate the wheel. So as the wheel rotated it deformed the wire.