Change search
CiteExportLink to record
Permanent link

Direct link
Cite
Citation style
  • apa
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
  • rtf
A novel method for geometric quality assurance of rock joint replicas in direct shear testing – Part 1: Derivation of quality assurance parameters and geometric reproducibility
RISE Research Institutes of Sweden, Materials and Production, Applied Mechanics. KTH Royal Institute of Technology, Sweden.ORCID iD: 0000-0002-4551-5644
KTH Royal Institute of Technology, Sweden.
KTH Royal Institute of Technology, Sweden; SKB Swedish Nuclear Fuel and Waste Management Co, Sweden.
RISE Research Institutes of Sweden, Materials and Production, Applied Mechanics.ORCID iD: 0000-0001-7182-0872
Show others and affiliations
2023 (English)In: Journal of Rock Mechanics and Geotechnical Engineering, ISSN 1674-7755Article in journal (Refereed) Epub ahead of print
Abstract [en]

Since each rock joint is unique by nature, the utilization of replicas in direct shear testing is required to carry out experimental parameter studies. However, information about the ability of the replicas to simulate the shear mechanical behavior of the rock joint and their dispersion in direct shear testing is lacking. With the aim to facilitate generation of high-quality direct shear test data from replicas, a novel component in the testing procedure is introduced by presenting two parameters for geometric quality assurance. The parameters are derived from surface comparisons of three-dimensional (3D) scanning data of the rock joint and its replicas. The first parameter, σmf, captures morphological deviations between the replica and the rock joint surfaces. σmf is derived as the standard deviation of the deviations between the coordinate points of the replica and the rock joint. Four sources of errors introduced in the replica manufacturing process employed in this study could be identified. These errors could be minimized, yielding replicas with σmf ≤ 0.06 mm. The second parameter is a vector, VHp100, which describes deviations with respect to the shear direction. It is the projection of the 100 mm long normal vector of the best-fit plane of the replica joint surface to the corresponding plane of the rock joint. |VHp100| was found to be less than or equal to 0.36 mm in this study. Application of these two geometric quality assurance parameters demonstrates that it is possible to manufacture replicas with high geometric similarity to the rock joint. In a subsequent paper (part 2), σmf and VHp100 are incorporated in a novel quality assurance method, in which the parameters shall be evaluated prior to direct shear testing. Replicas having parameter values below established thresholds shall have a known and narrow dispersion and imitate the shear mechanical behavior of the rock joint.

Place, publisher, year, edition, pages
Chinese Academy of Sciences , 2023.
Keywords [en]
Geometric quality assurance, Geometric reproducibility, Replicas, Rock joint, Surface comparisons, Three-dimensional (3D) scanning
National Category
Civil Engineering
Identifiers
URN: urn:nbn:se:ri:diva-63984DOI: 10.1016/j.jrmge.2022.12.011Scopus ID: 2-s2.0-85147379920OAI: oai:DiVA.org:ri-63984DiVA, id: diva2:1737454
Note

Correspondence Address: Larsson, J, RISE, Sweden; email: jorgen.larsson@ri.se; Funding details: BeFo 391; Funding details: Nuclear Waste Management Organization, NWMO; Funding text 1: The authors would like to acknowledge the financial contribution received from BeFo Rock Engineering Research Foundation (Grant proposal BeFo 391); Nuclear Waste Management Organization (NWMO) , Toronto, Canada and Swedish Nuclear Fuel and Waste Management Co. ( SKB ), Solna, Sweden. The authors also would like to acknowledge Jörgen Spetz at the Department of Measurement Technology at Research Institutes of Sweden (RISE) for performing the scanning.

Available from: 2023-02-16 Created: 2023-02-16 Last updated: 2023-07-06Bibliographically approved

Open Access in DiVA

No full text in DiVA

Other links

Publisher's full textScopus

Authority records

Larsson, JörgenJohnson, ErlandFlansbjer, MathiasWilliams Portal, Natalie

Search in DiVA

By author/editor
Larsson, JörgenJohnson, ErlandFlansbjer, MathiasWilliams Portal, Natalie
By organisation
Applied Mechanics
In the same journal
Journal of Rock Mechanics and Geotechnical Engineering
Civil Engineering

Search outside of DiVA

GoogleGoogle Scholar

doi
urn-nbn

Altmetric score

doi
urn-nbn
Total: 60 hits
CiteExportLink to record
Permanent link

Direct link
Cite
Citation style
  • apa
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
  • rtf