期刊
ADVANCED THEORY AND SIMULATIONS
卷 5, 期 3, 页码 -出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/adts.202100282
关键词
finite element method; orb web; spider; vibrations; waves
资金
- EU [863179]
- Caritro Foundation [U1277.2020/SG.1130]
This study introduces a numerical model based on nonlinear stress-strain constitutive relations for spider silk to investigate how the spider orb web allows spiders to detect and localize prey impacts. The results indicate that the orb web center's relative transverse displacements, produced by local resonance mechanisms, are used for precise localization, while nonlinear stress stiffening effects improve prey sensing. Additionally, it is shown that a large number of radial threads may not be necessary for prey localization.
Spider webs are mechanical systems able to deliver an outstanding compromise between distinct requirements such as absorbing impacts and transmitting information about vibration sources. Both the frequency information and amplitude of input signals can be used by the spider to identify stimuli, aided by the mechanical filtering properties of orb webs. In this work, a numerical model based on nonlinear stress-strain constitutive relations for spider silk is introduced to investigate how the spider orb web allows spiders to detect and localize prey impacts. The obtained results indicate how the orb web center relative transverse displacements, produced by local resonance mechanisms, are used for precise localization, while nonlinear stress stiffening effects improve prey sensing. Finally, it is also shown that, although beneficial, a large number of radial threads may not be necessary for prey localization.
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