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Modelling drop weight test numerically

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Old   April 3, 2023, 00:33
Smile Modelling drop weight test numerically
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Hassan Iftekhar
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I require a few tips regarding matching the numerical model of drop weight test with the experimentally obtained data.

I will briefly discuss the drop weight model here. I have modeled a drop weight test on ANSYS workbench. The impact velocity is 2.653 m/s. The impact is happening on a rubber/jute epoxy composite which consists of 2 layers. The upper layer is rubber with modulus of 10 MPa. The lower layer is Jute epoxy composite. The experimental drop weight curve is already obtained. The material properties of jute epoxy composite are obtained using U20MM software. Some of the stress limits of jute composite (Tensile strength, compressive and shear strength) are obtained using literature. The jute epoxy composite and rubber is modeled as a solid plate. The current mesh is coarse. Please note rubber is not modeled using hyperelastic models to avoid complexity.

Please see the attached file to see the force vs time curve and the difference in experimental and numerical data. Blue curve is obtained numerically.

Can anyone provide a few tips in tuning the material properties/model to match the numerical data with the experimental curve.
Attached Images
File Type: png Model.png (50.7 KB, 3 views)
File Type: png Force_Time_Curve.png (27.1 KB, 3 views)
File Type: png U20MM.png (128.6 KB, 3 views)
File Type: jpg Material Properties of Jute epoxy composite.jpg (127.6 KB, 3 views)

Last edited by hasanifte; April 3, 2023 at 00:35. Reason: Forgot to attach file
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