Jove
Visualize
Contact Us
JoVE
x logofacebook logolinkedin logoyoutube logo
ABOUT JoVE
OverviewLeadershipBlogJoVE Help Center
AUTHORS
Publishing ProcessEditorial BoardScope & PoliciesPeer ReviewFAQSubmit
LIBRARIANS
TestimonialsSubscriptionsAccessResourcesLibrary Advisory BoardFAQ
RESEARCH
JoVE JournalMethods CollectionsJoVE Encyclopedia of ExperimentsArchive
EDUCATION
JoVE CoreJoVE BusinessJoVE Science EducationJoVE Lab ManualFaculty Resource CenterFaculty Site
Terms & Conditions of Use
Privacy Policy
Policies

Related Concept Videos

Diamagnetic Shielding of Nuclei: Local Diamagnetic Current01:14

Diamagnetic Shielding of Nuclei: Local Diamagnetic Current

811
An applied magnetic field causes the electrons present in the molecule to circulate, setting up a local diamagnetic current within the molecule. The local diamagnetic current arising from circulating sigma-bonding electrons induces a magnetic field, Blocal that opposes the applied magnetic field, B0. The effective magnetic field experienced by these nuclei is given by the difference between the applied and local magnetic fields in a phenomenon called local diamagnetic shielding. Essentially,...
811
Thin-Walled Hollow Shafts01:15

Thin-Walled Hollow Shafts

161
In analyzing a thin-walled hollow shaft subjected to torsional loading, a segment with width dx is isolated for examination. Despite its equilibrium state, this segment faces torsional shearing forces at its ends. These forces are quantitatively described by the product of the longitudinal shearing stress on the segment's minor surface and the area of this surface, leading to the concept of shear flow. This shear flow is consistent throughout the structure, indicating a uniform distribution...
161
Transmission Shafts: Problem Solving01:09

Transmission Shafts: Problem Solving

206
Designing a solid shaft that transmits power from a motor to a machine tool involves a series of calculations to ensure the shaft can withstand the stresses applied by bending moments and torques. First, calculate the torque exerted on the gear, considering the power transmitted by the shaft and its rotational speed. Following this, compute the tangential forces acting on the gears, which directly relate to the torque and the gear radius.
Next, use bending moment diagrams for the shaft to...
206

You might also read

Related Articles

Articles linked to this work by shared authors, journal, and citation graph.

Sort by
Same author

Development and Validation of an Explainable Machine Learning Model for Predicting Repeat Catheter Ablation for Atrial Fibrillation: A Single-Center Retrospective Cohort Study.

International journal of general medicine·2026
Same author

<i>SGK1</i> Is Upregulated in Retained Placenta and Mediates Estradiol Effects in Bovine Endometrial Cells.

Cells·2026
Same author

Grounding surgical action triplets with instrument instance segmentation: a dataset and target-aware fusion approach.

International journal of computer assisted radiology and surgery·2026
Same author

Enhanced antimicrobial properties of POSS-modified composite resin with chlorhexidine-loaded bioactive glass.

Journal of dentistry·2026
Same author

Correction: A metabonomic study to explore potential markers of asymptomatic hyperuricemia and acute gouty arthritis.

Journal of orthopaedic surgery and research·2026
Same author

Age-dependent trade-offs between tubular esophagogastric and double-tract anastomosis after laparoscopic proximal gastrectomy: a retrospective cohort study.

Surgical endoscopy·2026
Same journal

Correction: A method for supervoxel-wise association studies of age and other non-imaging variables from coronary computed tomography angiograms.

Scientific reports·2026
Same journal

Poly(bromophenol blue)/CoSn(OH)<sub>6</sub> cubic particles modified pencil graphite electrode for electrochemical determination of diphenhydramine.

Scientific reports·2026
Same journal

Dietary Chlorella, Spirulina, and acidifier modulate jejunal cytokine-related gene expression in broiler chickens.

Scientific reports·2026
Same journal

Perceived physical activity barriers in university students: associations with fatigue and eating behaviours.

Scientific reports·2026
Same journal

Refuge limitation structures habitat use in agricultural landscapes: evidence from Sunda pangolins.

Scientific reports·2026
Same journal

Lightweight stateless transaction verification with outsourced witness updates for UTXO blockchains.

Scientific reports·2026
See all related articles

Related Experiment Video

Updated: May 26, 2025

Evaluation of an Exclusive Spur Dike U-Turn Design with Radar-Collected Data and Simulation
11:41

Evaluation of an Exclusive Spur Dike U-Turn Design with Radar-Collected Data and Simulation

Published on: February 1, 2020

20.3K

Numerical simulation method for double shield TBMs crossing weak zones.

Zhiwen Wang1,2, Meng Wei3,4, Yang Liu1,2

  • 1State Key Laboratory of Geohazard Prevention and Geoenvironment Protection (Chengdu University of Technology), Chengdu, 610059, China.

Scientific Reports
|February 21, 2025
PubMed
Summary
This summary is machine-generated.

Machine jamming in Double Shield Tunnel Boring Machines (DS TBMs) is a major operational challenge. This study develops a numerical simulation to quantify jamming risks, improving TBM safety and efficiency.

Keywords:
Deep Buried TunnelDouble Shield TBMNumerical SimulationTBM JammingWeak Zone

More Related Videos

Simulation, Fabrication and Characterization of THz Metamaterial Absorbers
13:44

Simulation, Fabrication and Characterization of THz Metamaterial Absorbers

Published on: December 27, 2012

15.3K
In Situ Time-dependent Dielectric Breakdown in the Transmission Electron Microscope: A Possibility to Understand the Failure Mechanism in Microelectronic Devices
09:26

In Situ Time-dependent Dielectric Breakdown in the Transmission Electron Microscope: A Possibility to Understand the Failure Mechanism in Microelectronic Devices

Published on: June 26, 2015

8.7K

Related Experiment Videos

Last Updated: May 26, 2025

Evaluation of an Exclusive Spur Dike U-Turn Design with Radar-Collected Data and Simulation
11:41

Evaluation of an Exclusive Spur Dike U-Turn Design with Radar-Collected Data and Simulation

Published on: February 1, 2020

20.3K
Simulation, Fabrication and Characterization of THz Metamaterial Absorbers
13:44

Simulation, Fabrication and Characterization of THz Metamaterial Absorbers

Published on: December 27, 2012

15.3K
In Situ Time-dependent Dielectric Breakdown in the Transmission Electron Microscope: A Possibility to Understand the Failure Mechanism in Microelectronic Devices
09:26

In Situ Time-dependent Dielectric Breakdown in the Transmission Electron Microscope: A Possibility to Understand the Failure Mechanism in Microelectronic Devices

Published on: June 26, 2015

8.7K

Area of Science:

  • Geotechnical Engineering
  • Tunneling Technology
  • Mechanical Engineering

Background:

  • Machine jamming, specifically shield and cutterhead jamming, impedes Double Shield Tunnel Boring Machine (DS TBM) operations.
  • Deformation and collapse of surrounding rock are primary causes of DS TBM jamming.
  • Accurate quantification of jamming factors is crucial for safe and efficient tunneling.

Purpose of the Study:

  • To develop and validate a numerical simulation method for assessing DS TBM jamming.
  • To investigate the calculation methods for thrust resistance and cutterhead torque in DS TBMs.
  • To provide a quantitative assessment of potential jamming during the tunneling process.

Main Methods:

  • Developed a finite difference model in FLAC3D for DS TBM excavation in rock with weak zones.
  • Incorporated interactions between the surrounding rock, TBM cutterhead, and shield into the model.
  • Created a Python program to extract stress data for quantitative jamming risk assessment.

Main Results:

  • The numerical simulation method accurately quantifies the impact of surrounding rock conditions on DS TBM jamming.
  • Stress data extraction enabled precise assessment of shield and cutterhead jamming potential.
  • The method was validated using a real-world shield jamming incident in the DXL tunnel.

Conclusions:

  • The proposed numerical simulation method is accurate and applicable for predicting and mitigating DS TBM jamming.
  • This approach enhances the understanding of rock-TBM interactions, leading to improved tunneling safety.
  • Quantitative analysis of jamming factors supports optimized DS TBM operational strategies.