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

Torque Free Motion01:15

Torque Free Motion

564
The torque-free motion refers to the movement of a rigid body in space when no external torques are acting upon it. This type of motion can be observed in environments where there are no external forces or frictions, like in outer space. For example, a rotation of Mars in space is a torque-free motion. Mars is an axisymmetric object, meaning it has an axis of symmetry along which it rotates, designated as the z-axis. The rotating frame of reference is defined such that the center of mass of...
564
Residual Stresses in Circular Shafts01:10

Residual Stresses in Circular Shafts

233
In materials that exhibit elastic and plastic behavior, known as elastoplastic materials, residual stresses can accumulate when these materials experience plastic deformation. This deformation arises from either high levels of shearing stress or significant strains. Residual stresses are internal stresses that persist within a material after removing the external force causing deformation. This phenomenon is demonstrated when observing the behavior of a shaft under torque; notably, the...
233
Stresses in a Shaft01:18

Stresses in a Shaft

503
The shaft PQ is subjected to a twisting force when equal and opposite torques are applied on either side. A section that cuts perpendicular to the shaft's axis at any arbitrary point R is examined to understand this. When the free-body diagram of the QR segment is analyzed, it reveals the shearing forces exerted by the PR portion onto the QR segment as the shaft experiences twisting.
Applying equilibrium conditions to the QR segment establishes that the internal shearing forces within the...
503
Circular Shaft - Stresses in Linear Range01:13

Circular Shaft - Stresses in Linear Range

356
Consider a scenario where a circular shaft is subject to torque that remains within the boundaries of Hooke's Law, avoiding any permanent deformation. So, the formula for shearing strain is revisited. This formula is multiplied by the modulus of rigidity, and then Hooke's Law for the shearing stress and strain is applied. As a result, the equation for shearing stress in a shaft can be derived.
356
Deformation in a Circular Shaft01:10

Deformation in a Circular Shaft

441
One of the distinctive characteristics of circular shafts is their ability to maintain their cross-sectional integrity under torsion. In other words, each cross-section continues to exist as a flat, unaltered entity, simply rotating like a solid, rigid slab. To understand the distribution of shearing stress within such a shaft, consider a cylindrical section inside this circular shaft. This section has a length of L and a radius of R, with one end fixed. The radius of the cylindrical section is...
441
Net Torque Calculations01:19

Net Torque Calculations

9.6K
When a mechanic tries to remove a hex nut with a wrench, it is easier if the force is applied at the farthest end of the wrench handle. The lever arm is the distance from the pivot point (the hex nut in this case) to the person’s hand. If this distance is large, the torque is higher. Only the component of the force perpendicular to the lever arm contributes to the torque. Therefore, pushing the wrench perpendicular to the lever arm is more advantageous. If multiple people apply force to...
9.6K

You might also read

Related Articles

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

Sort by
Same author

PSMC2 promotes hepatocellular carcinoma progression through interaction with EGFR.

Clinical and experimental medicine·2026
Same author

The Bufei Nashen Pill Alleviates COPD by Targeting Endoplasmic Reticulum Stress Through the PERK/eIF2α Signaling Pathway.

Immunity, inflammation and disease·2026
Same author

Exogenous melatonin alleviates copper stress in apple rootstock M9T337 by regulating the antioxidant system and carbon-nitrogen metabolism.

Frontiers in plant science·2026
Same author

Acid, Alkaline, or Salt? Impact of the Activators on the Sodium Storage Properties of Lignin-Derived Hard Carbon.

Langmuir : the ACS journal of surfaces and colloids·2026
Same author

Antibiofilm efficacy of phage W5 against antimicrobial-resistant <i>Salmonella</i> Typhimurium targeting biofilms in dairy/meat/egg and on food-processing surfaces (PP/PE).

Applied and environmental microbiology·2026
Same author

Chrysanthemum classification via color space fusion transformer.

Scientific reports·2026

Related Experiment Video

Updated: Sep 9, 2025

Isokinetic Robotic Device to Improve Test-Retest and Inter-Rater Reliability for Stretch Reflex Measurements in Stroke Patients with Spasticity
08:40

Isokinetic Robotic Device to Improve Test-Retest and Inter-Rater Reliability for Stretch Reflex Measurements in Stroke Patients with Spasticity

Published on: June 12, 2019

7.5K

A Novel Variable Stiffness Torque Sensor with Adjustable Resolution.

Zhongyuan Mao1, Yuanchang Zhong1, Xuehui Zhao1

  • 1School of Electrical Engineering, Chongqing University, Chongqing 400044, China.

Micromachines
|August 28, 2025
PubMed
Summary
This summary is machine-generated.

This study introduces a novel variable stiffness torque sensor using magnetorheological fluid (MRF) for dynamic adjustment of resolution and range in rotating machinery. The innovative design offers high accuracy and adaptability for demanding torque measurement applications.

Keywords:
MRFadjustable rangeadjustable resolutionscrew modulation methodtorque sensortorsion spring

More Related Videos

Design and Application of a Fault Detection Method Based on Adaptive Filters and Rotational Speed Estimation for an Electro-Hydrostatic Actuator
06:45

Design and Application of a Fault Detection Method Based on Adaptive Filters and Rotational Speed Estimation for an Electro-Hydrostatic Actuator

Published on: October 28, 2022

1.8K
A Method for Evaluating Timeliness and Accuracy of Volitional Motor Responses to Vibrotactile Stimuli
07:28

A Method for Evaluating Timeliness and Accuracy of Volitional Motor Responses to Vibrotactile Stimuli

Published on: August 2, 2016

7.4K

Related Experiment Videos

Last Updated: Sep 9, 2025

Isokinetic Robotic Device to Improve Test-Retest and Inter-Rater Reliability for Stretch Reflex Measurements in Stroke Patients with Spasticity
08:40

Isokinetic Robotic Device to Improve Test-Retest and Inter-Rater Reliability for Stretch Reflex Measurements in Stroke Patients with Spasticity

Published on: June 12, 2019

7.5K
Design and Application of a Fault Detection Method Based on Adaptive Filters and Rotational Speed Estimation for an Electro-Hydrostatic Actuator
06:45

Design and Application of a Fault Detection Method Based on Adaptive Filters and Rotational Speed Estimation for an Electro-Hydrostatic Actuator

Published on: October 28, 2022

1.8K
A Method for Evaluating Timeliness and Accuracy of Volitional Motor Responses to Vibrotactile Stimuli
07:28

A Method for Evaluating Timeliness and Accuracy of Volitional Motor Responses to Vibrotactile Stimuli

Published on: August 2, 2016

7.4K

Area of Science:

  • Mechanical Engineering
  • Sensor Technology
  • Materials Science

Background:

  • Increasing demands for torque sensor resolution and range in rotating machinery.
  • Limitations of traditional strain gauge-based torque sensors in adapting to varying measurement conditions.

Purpose of the Study:

  • To present a novel variable stiffness torque sensor for dynamic adjustment of resolution and range.
  • To address the stringent requirements of torque measurements in rotating machinery.
  • To overcome the limitations of existing torque sensing technologies.

Main Methods:

  • Integration of torsion springs and magnetorheological fluid (MRF) for adjustable stiffness.
  • Utilizing magnetic fields to alter MRF shear stress and thus sensor stiffness.
  • Development and validation of a stiffness model using finite element analysis.
  • Implementation of a screw modulation-based method for non-contact angle measurement.

Main Results:

  • Demonstration of dynamic, continuous adjustment of torque sensor resolution and range.
  • Validation of the stiffness model's accuracy.
  • Achieved high non-contact angle measurement accuracy and resolved eccentricity issues.
  • Experimental evaluation showing excellent linearity, hysteresis, and repeatability of the sensor prototype.

Conclusions:

  • The novel variable stiffness torque sensor effectively meets the demands for adaptable resolution and range in rotating machinery.
  • The combination of MRF and torsion springs offers a significant advancement over traditional torque sensors.
  • The proposed sensor technology shows promise for high-precision torque measurement applications.