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

Plastic Deformation in Circular Shafts01:20

Plastic Deformation in Circular Shafts

182
When materials are subjected to forces that surpass their yield strength, they undergo a process known as plastic deformation. This results in a permanent alteration or strain in their structure. This concept can be specifically applied to circular shafts, where the deformation leads to a change in its shape. The precise evaluation of this plastic deformation requires understanding the stress distribution within the circular shaft, which is achieved by calculating the maximum shearing stress in...
182
Deformation in a Circular Shaft01:10

Deformation in a Circular Shaft

273
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...
273
Circular Shafts - Elastoplastic Materials01:24

Circular Shafts - Elastoplastic Materials

101
The study of solid circular shafts under stress shows that within the elastic limit, stress increases directly to the distance from the shaft's center. This relationship holds until the shaft reaches a critical point of stress, beyond which it begins to yield, marking the transition from elastic to plastic deformation. At this crucial juncture, the maximum torque the shaft can endure without permanent deformation is determined, signifying the limit of its elastic behavior.
As torque on the...
101
Deformation of Member under Multiple Loadings01:11

Deformation of Member under Multiple Loadings

160
When a rod is made of different materials or has various cross-sections, it must be divided into parts that meet the necessary conditions for determining the deformation. These parts are each characterized by their internal force, cross-sectional area, length, and modulus of elasticity. These parameters are then used to compute the deformation of the entire rod.
In the case of a member with a variable cross-section, the strain is not constant but depends on the position. The deformation of an...
160

You might also read

Related Articles

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

Sort by
Same author

Unilateral extrapedicular vs. bilateral transpedicular percutaneous kyphoplasty in osteoporotic vertebral compression fractures: an exploratory systematic review and meta-analysis.

Frontiers in surgery·2026
Same author

Cascade-Activatable Nanoprobes for NIR-II Fluorescence/Photoacoustic Dual-Modal Imaging of Atherosclerotic Plaques.

Small (Weinheim an der Bergstrasse, Germany)·2026
Same author

Nasal microenvironment self-responsive herbal hydrogel alleviates Parkinsonian pathology via the inhibition of α-synuclein liquid-liquid phase separation.

Biomaterials·2026
Same author

Transverse process-pedicle versus conventional transpedicular approach in percutaneous kyphoplasty for osteoporotic vertebral compression fractures: a systematic review and pilot meta-analysis.

European spine journal : official publication of the European Spine Society, the European Spinal Deformity Society, and the European Section of the Cervical Spine Research Society·2026
Same author

Comparison of clinical outcomes and quality of life for robotic versus laparoscopic surgery in elderly patients with mid-low rectal cancer: a multicenter cohort study with inverse probability of treatment weighting analysis.

Frontiers in oncology·2026
Same author

Family single-cell atlases reveal pig pregnancy and fetal growth restriction critical cell types.

Science (New York, N.Y.)·2026
Same journal

Dynamic-Based Path Planning and Locomotion of Tensegrity Robots Considering Environmental Interaction.

Soft robotics·2026
Same journal

A Soft Magnetic Jamming Method Enabling Variable Stiffness and Active Steering for Robotic Catheter.

Soft robotics·2026
Same journal

Research on the Design of Variable Stiffness Adhesive Feet and Cooperative Crawling Mechanism for Soft Bionic Gecko-Inspired Wall-Climbing Robots.

Soft robotics·2026
Same journal

Bioinspired Swallowing Soft Gripper with Toroidal Optical Waveguides for Multimodal Interactive Perception.

Soft robotics·2026
Same journal

Plant-Inspired Elastic-Hydraulic Tactile Sensing Enables Quantitative Stiffness Estimation in Soft Robots.

Soft robotics·2026
Same journal

Ultrastable Soft Capacitive Tactile Sensor with Impedance-Modulated Signal.

Soft robotics·2026
See all related articles

Related Experiment Video

Updated: Jun 17, 2025

Fabrication of Soft Pneumatic Network Actuators with Oblique Chambers
07:09

Fabrication of Soft Pneumatic Network Actuators with Oblique Chambers

Published on: August 17, 2018

9.0K

A Reconfigurable Soft Helical Actuator with Variable Stiffness Skeleton.

Pei Jiang1, Teng Ma1, Ji Luo1

  • 1State Key Laboratory of Mechanical Transmission, Chongqing University, Chongqing, China.

Soft Robotics
|August 14, 2024
PubMed
Summary
This summary is machine-generated.

This study introduces a novel soft actuator with a variable stiffness skeleton made of shape memory polymer (SMP). This design allows the soft actuator to switch between bending and helical motions in real-time, enhancing its adaptability.

Keywords:
SMP skeletonhelical motionreconfigurable actuatorvariable stiffness skeleton

More Related Videos

Design and Fabrication of an Elastomeric Unit for Soft Modular Robots in Minimally Invasive Surgery
11:06

Design and Fabrication of an Elastomeric Unit for Soft Modular Robots in Minimally Invasive Surgery

Published on: November 14, 2015

8.9K
Bioinspired Soft Robot with Incorporated Microelectrodes
08:24

Bioinspired Soft Robot with Incorporated Microelectrodes

Published on: February 28, 2020

8.7K

Related Experiment Videos

Last Updated: Jun 17, 2025

Fabrication of Soft Pneumatic Network Actuators with Oblique Chambers
07:09

Fabrication of Soft Pneumatic Network Actuators with Oblique Chambers

Published on: August 17, 2018

9.0K
Design and Fabrication of an Elastomeric Unit for Soft Modular Robots in Minimally Invasive Surgery
11:06

Design and Fabrication of an Elastomeric Unit for Soft Modular Robots in Minimally Invasive Surgery

Published on: November 14, 2015

8.9K
Bioinspired Soft Robot with Incorporated Microelectrodes
08:24

Bioinspired Soft Robot with Incorporated Microelectrodes

Published on: February 28, 2020

8.7K

Area of Science:

  • Robotics
  • Materials Science
  • Mechanical Engineering

Background:

  • Soft actuators offer advantages in adaptability and compliance over rigid actuators.
  • Current soft actuators are limited to preprogrammed motions due to fixed deformation constraints.
  • There is a need for reconfigurable soft actuators capable of multiple motion types.

Purpose of the Study:

  • To develop a reconfigurable soft actuator with variable stiffness capabilities.
  • To enable real-time switching between different motion modes (bending and helical).
  • To investigate the use of shape memory polymer (SMP) for variable stiffness constraints in soft actuators.

Main Methods:

  • Designed a soft helical actuator with a variable stiffness skeleton made of SMP.
  • Encased the SMP skeleton within a fiber-reinforced chamber.
  • Utilized heating to alter the SMP skeleton's stiffness, thereby controlling actuator deformation.
  • Developed a theoretical model to predict actuator behavior under pressure.

Main Results:

  • The developed actuator successfully switched between bending and helical motion in real-time.
  • Experimental results validated the accuracy of the theoretical model.
  • Investigated the impact of various design parameters on actuator performance.

Conclusions:

  • Variable stiffness materials like SMP can be effectively used to create reconfigurable soft actuators.
  • The proposed actuator design overcomes the limitations of fixed-motion soft actuators.
  • The study provides valuable design guidelines for future variable stiffness soft actuators.