Lattice structures find applications in many structural areas where the weight to strength ratio needs to be minimum, for example: in space and aerospace applications. With the proper choice of lattice and selection of their geometric features functionally graded structures are designed. Lattice structures are non-homogeneous periodic structures at macroscopic level and the distribution of load, stress and strain will not be as uniform as in a continuous and homogeneous solid metal structures and components. For example, a plate made of lattice structure with face sheets will exhibit a different distribution of the stress and strain compared to a solid plate. This poses a different challenge and opportunity to study and understand the end effects of structural components made with lattice structures. In this article Saint Venant’s end effect of a lattice plate is analyzed using finite element analysis. End effects of a solid plate are analyzed and considered as base line. The end effect of a plate made with simple lattice structures like square, triangular and honeycomb are analyzed and its relationship with volume fraction of the lattice is studied.

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Analyzing the Saint Venant End Effects in Cellular Lattice Structures

  • Paul Sudhahar,
  • Nuli Sidhardha,
  • Tirumala Rao Koka,
  • Perumal Rakkiyagounder

摘要

Lattice structures find applications in many structural areas where the weight to strength ratio needs to be minimum, for example: in space and aerospace applications. With the proper choice of lattice and selection of their geometric features functionally graded structures are designed. Lattice structures are non-homogeneous periodic structures at macroscopic level and the distribution of load, stress and strain will not be as uniform as in a continuous and homogeneous solid metal structures and components. For example, a plate made of lattice structure with face sheets will exhibit a different distribution of the stress and strain compared to a solid plate. This poses a different challenge and opportunity to study and understand the end effects of structural components made with lattice structures. In this article Saint Venant’s end effect of a lattice plate is analyzed using finite element analysis. End effects of a solid plate are analyzed and considered as base line. The end effect of a plate made with simple lattice structures like square, triangular and honeycomb are analyzed and its relationship with volume fraction of the lattice is studied.