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Earthworm-Inspired Penetration in Geomaterials.

Record Type:	Language materials, manuscript : Monograph/item
Title/Author:	Earthworm-Inspired Penetration in Geomaterials./
Author:	Naziri, Saeedeh.
Description:	1 online resource (109 pages)
Notes:	Source: Dissertations Abstracts International, Volume: 85-03, Section: B.
Contained By:	Dissertations Abstracts International85-03B.
Subject:	Civil engineering. -
Online resource:	click for full text (PQDT)
ISBN:	9798380163613

Earthworm-Inspired Penetration in Geomaterials.
Naziri, Saeedeh.

Earthworm-Inspired Penetration in Geomaterials. - 1 online resource (109 pages)

Source: Dissertations Abstracts International, Volume: 85-03, Section: B.

Thesis (Ph.D.)--New Mexico State University, 2023.

Includes bibliographical references

Earthworms and other annelids have been the source of inspiration for a wide range of exciting limbless devices and robots. Penetrating the subsurface involves complex soil-tool mechanical interactions. The volume expansion and contraction that define peristaltic motion cause simultaneous localized densification of the soil (solid-like behavior), the formation of shear bands and subsequent cavity collapse (flow-like behavior). Therefore, the movement of the worm alters the structure of the soil and constantly changes the nature of their interaction. This makes it difficult to use simple continuum mechanics models to study subsurface peristaltic motion. In this study, a simple earthworm (Lumbricus terrestris) inspired soil penetration device is created by combining a miniature steel cone penetrometer with a soft membrane. By controlling three primary variables (tip morphology, depth interval, and injected volume), the device is able to penetrate into granular media while experiencing significantly reduced resistance, reduced energy demand, and in some cases both. The probe is deployed in Lunar regolith simulant and sand bench-scale testbeds. Finally, the experience and knowledge gained in the laboratory testing are used in the development of a self-burrowing earthworm-inspired probe prototype.

Electronic reproduction.
Ann Arbor, Mich. :
ProQuest,
2024

Mode of access: World Wide Web

ISBN: 9798380163613Subjects--Topical Terms:

561339
Civil engineering.
Subjects--Index Terms:

Bio-inspired subsurface exploration excavation self-burrowing earthwormIndex Terms--Genre/Form:

554714
Electronic books.

Earthworm-Inspired Penetration in Geomaterials.
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520 $a Earthworms and other annelids have been the source of inspiration for a wide range of exciting limbless devices and robots. Penetrating the subsurface involves complex soil-tool mechanical interactions. The volume expansion and contraction that define peristaltic motion cause simultaneous localized densification of the soil (solid-like behavior), the formation of shear bands and subsequent cavity collapse (flow-like behavior). Therefore, the movement of the worm alters the structure of the soil and constantly changes the nature of their interaction. This makes it difficult to use simple continuum mechanics models to study subsurface peristaltic motion. In this study, a simple earthworm (Lumbricus terrestris) inspired soil penetration device is created by combining a miniature steel cone penetrometer with a soft membrane. By controlling three primary variables (tip morphology, depth interval, and injected volume), the device is able to penetrate into granular media while experiencing significantly reduced resistance, reduced energy demand, and in some cases both. The probe is deployed in Lunar regolith simulant and sand bench-scale testbeds. Finally, the experience and knowledge gained in the laboratory testing are used in the development of a self-burrowing earthworm-inspired probe prototype.
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538 $a Mode of access: World Wide Web
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