Numerical Simulation of Biological Structures: Paddlefish Rostrum

Abstract

The rostrum of a Paddlefish is used as an antenna to detect electrostatic impulses emitted by plankton and also for hydrodynamic stability while feeding. The rostrum is formed by a network of cartilage, tissue, and interlocking star shaped bones called stellate bones. The objective of this work is to study the load transfer mechanisms of the rostrum bone structure. Steel with elastic-plastic behavior is considered in this study as a basic homogeneous material to evaluate the performance of four models using the following elements: first-order reduced integration, first-order full integration, second-order reduced integration, and second-order full integration. From the study is found that second-order formulation resulted in lower structural stiffness as seen by higher displacements and stresses than using first-order formulated elements. Von Mises stresses as well as global stresses along the rostrum and at a particular location and bones were extracted and compared for the second-order-reduced integration model.

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Document Details

Document Type
Technical Report
Publication Date
May 01, 2019
Accession Number
AD1081195

Entities

People

  • Felipe J. Acosta
  • Guillermo A Riveros
  • Reena R. Patel
  • Wayne D. Hodo

Organizations

  • Engineer Research and Development Center

Tags

Communities of Interest

  • Engineered Resilient Systems

DTIC Thesaurus Topics

  • Cartilage
  • Computational Fluid Dynamics
  • Computational Science
  • Displacement
  • Engineering
  • Engineers
  • Finite Element Analysis
  • Fish
  • Geometry
  • Materials
  • Mechanical Properties
  • Mechanics
  • Numerical Analysis
  • Stiffness
  • Stress Strain Relations
  • Tissues
  • Yield Strength

Readers

  • Fluid Dynamics.
  • Nuclear Civil Defense.
  • Structural Health Monitoring of Composite Structures.