Ansys Workbench&Solidworks Simulation Von-Mises Stress 之分析誤差

分別用Ansys Workbench & Solidworks Simulation分析一mm立方體,材料為鋁合金
立方體底部固定(Fixed support),施以一向右力

Mass = 2.77e-6kg
Volume = 1 mm^3
Density = 2700 kg/m^3
Yield strengh =  55.2MPa
Relevance = 100 (網格最細)
Nodes = 30800
Elements = 6859

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材料降伏應力為55MPa，所以當在每平方mm面積上，施以超過55MPa之力，會使材料產生永久破壞。

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Ansys Workbench 分析：
Case 1
Force = 1N
　
Results:             Von-Mises Stress ,Max: 8.6599MPa ,Min:1.7483e-3MPa
                         Total deformation , Max:5.2048e-5mm,Min:0mm

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Case 2
Force = 25N
　
Results:              Von-Mises Stress ,Max: 216.5MPa ,Min:4.3708e-2MPa
                          Total deformation , Max:1.3012e-3mm,Min:0mm

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Case 3
Force = 50N
　
Results:              Von-Mises Stress ,Max: 432.99MPa ,Min:8.7416e-2MPa
                          Total deformation , Max:2.6024e-3mm,Min:0mm

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Case 4
Force = 60N
　
Results:              Von-Mises Stress ,Max: 519.59MPa ,Min:0.1049MPa
                          Total deformation , Max:3.1229e-3mm,Min:0mm

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Solidworks Simulation 分析
Case 1
Force = 1N
　
Results:              Von-Mises Stress ,Max: 8.018MPa ,Min:1346.8Pa
                          Displacement , Max:5.316e-5mm,Min:1e-3mm

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Case 2
Force = 25N
　
Results:              Von-Mises Stress ,Max: 200MPa ,Min:33669.3Pa
                          Displacement , Max:1.34e-3mm,Min:1e-3mm

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Case 3
Force = 50N
　
Results:              Von-Mises Stress ,Max: 400MPa ,Min:67338.6Pa
                          Displacement , Max:2.68e-3mm,Min:1e-3mm

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Case 4
Force = 60N
　
Results:              Von-Mises Stress ,Max: 481MPa ,Min:80806.4Pa
                          Displacement , Max:3.217e-3mm,Min:1e-3mm

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Stress/max|  Ansys |Solidworks|誤差         |
Case1       |8.6599 | 8.018       |1.08          |
Case2       |216.5   | 200          |1.0825      |
Case3       |432.99 | 400          |1.082475  |
Case4       |519.59 | 481          |1.08022    |
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Dedormation/max|  Ansys      |Solidworks|誤差        |
Case1                 |5.2048e-5 | 5.361e-5   |0.97        |
Case2                 |1.3012e-3 | 1.34e-3     |0.971      |
Case3                 |2.6024e-3 | 2.68e-3     |0.97104  |
Case4                 |3.1229e-3 | 3.217e-3   |0.9707    |
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結論：Ansys Workbench&Solidworks Simulation Von-Mises Stress 之分析誤差，在網格設定都是最細的情況下，不管是應力或位移分析，誤差都相當小。