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Contact pressure measurement and finite element modelling of bovine claws on concrete floors

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Abstract
A finite element model was created in Abaqus to model the interaction between bovine claws and concrete floors with defined roughness and friction coefficients. The geometry of the claw horn capsule was built by using X-ray tomgraphy scanner images of an unloaded bovin claw. A volumetric mesh was applied, consisting of tetrahedral elements. The horn was considered to be an isotropic elastic material. Different Young's moduli were attributed to dorsal wall horn, abaxial and axial wall horn, and bulb horn. The top border area of the horn capsule was fixed to restrain it from motion, but angular rotations were allowed. The model was completed by introducting a rigid support that simulated a concrete floor. With this model the effect of varying floor roughness and claw-floor friction on contact pressures and von Mises stresses in the claw horn was evaluated. Under loads up to 6 kN, contact pressures up to 28 MPa and von Mises stresses up to 19 MPa were found. Maximum von Mises stresses are registered in the claw sole. the roughness of the floor was the main determinant in the occurring contact pressures. The contact pressure results were compared to the values measured in a laboratory experiment on claws in a hydraulic compression machine.
Keywords
contact pressure, finite element modelling (FEM), bovine claw, concrete floor

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Citation

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MLA
De Belie, Nele, and Arnold Franck. “Contact Pressure Measurement and Finite Element Modelling of Bovine Claws on Concrete Floors.” Proceedings of International Conference of Agricultural Engineering - CIGR World Congress, 2008, pp. 1–4.
APA
De Belie, N., & Franck, A. (2008). Contact pressure measurement and finite element modelling of bovine claws on concrete floors. Proceedings of International Conference of Agricultural Engineering - CIGR World Congress, 1–4.
Chicago author-date
De Belie, Nele, and Arnold Franck. 2008. “Contact Pressure Measurement and Finite Element Modelling of Bovine Claws on Concrete Floors.” In Proceedings of International Conference of Agricultural Engineering - CIGR World Congress, 1–4.
Chicago author-date (all authors)
De Belie, Nele, and Arnold Franck. 2008. “Contact Pressure Measurement and Finite Element Modelling of Bovine Claws on Concrete Floors.” In Proceedings of International Conference of Agricultural Engineering - CIGR World Congress, 1–4.
Vancouver
1.
De Belie N, Franck A. Contact pressure measurement and finite element modelling of bovine claws on concrete floors. In: Proceedings of International Conference of Agricultural Engineering - CIGR World Congress. 2008. p. 1–4.
IEEE
[1]
N. De Belie and A. Franck, “Contact pressure measurement and finite element modelling of bovine claws on concrete floors,” in Proceedings of International Conference of Agricultural Engineering - CIGR World Congress, Iguassu Falls City, Brazil, 2008, pp. 1–4.
@inproceedings{680520,
  abstract     = {{A finite element model was created in Abaqus to model the interaction between bovine claws and concrete floors with defined roughness and friction coefficients. The geometry of the claw horn capsule was built by using X-ray tomgraphy scanner images of an unloaded bovin claw. A volumetric mesh was applied, consisting of tetrahedral elements. The horn was considered to be an isotropic elastic material. Different Young's moduli were attributed to dorsal wall horn, abaxial and axial wall horn, and bulb horn. The top border area of the horn capsule was fixed to restrain it from motion, but angular rotations were allowed. The model was completed by introducting a rigid support that simulated a concrete floor. With this model the effect of varying floor roughness and claw-floor friction on contact pressures and von Mises stresses in the claw horn was evaluated. Under loads up to 6 kN, contact pressures up to 28 MPa and von Mises stresses up to 19 MPa were found. Maximum von Mises stresses are registered in the claw sole. the roughness of the floor was the main determinant in the occurring contact pressures. The contact pressure results were compared to the values measured in a laboratory experiment on claws in a hydraulic compression machine.}},
  author       = {{De Belie, Nele and Franck, Arnold}},
  booktitle    = {{Proceedings of International Conference of Agricultural Engineering - CIGR World Congress}},
  issn         = {{1982-3797}},
  keywords     = {{contact pressure,finite element modelling (FEM),bovine claw,concrete floor}},
  language     = {{eng}},
  location     = {{Iguassu Falls City, Brazil}},
  pages        = {{1--4}},
  title        = {{Contact pressure measurement and finite element modelling of bovine claws on concrete floors}},
  year         = {{2008}},
}