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Related Concept Videos

Plastic Deformations01:19

Plastic Deformations

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Plastic deformation represents a fundamental concept in materials science, which explains the irreversible change in the shape of a material when it experiences stress beyond its elastic capability. This phenomenon is important in structural engineering, especially in designing and analyzing cantilever beams—structures that are securely fixed at one end and bear loads at the opposite end. When these beams are subjected to loads within their elastic range, they will return to their...
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Plastic Deformations of Members with a Single Plane of Symmetry01:21

Plastic Deformations of Members with a Single Plane of Symmetry

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When a structural member undergoes plastic deformation due to bending, it is crucial to understand the position of the neutral axis and the stress distribution. This member, characterized by a single plane of symmetry, exhibits a uniform stress distribution, with negative stress above the neutral axis and positive stress below. Notably, the neutral axis does not align with the centroid of the cross-section. This misalignment is typical in cases where the cross-section is not rectangular or...
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Plastic Deformation in Circular Shafts01:20

Plastic Deformation in Circular Shafts

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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...
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Deformation of Member under Multiple Loadings01:11

Deformation of Member under Multiple Loadings

189
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...
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Bending of Members Made of Several Materials01:08

Bending of Members Made of Several Materials

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In analyzing a structural member composed of two different materials with identical cross-sectional areas, it is crucial to understand how their distinct elastic properties affect the member's response under load. The analysis involves assessing stress and strain distributions using the transformed section concept, which accounts for variations in material properties.
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Unsymmetric Bending01:18

Unsymmetric Bending

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Unsymmetrical bending occurs when the bending moment applied to a structural member does not align with its principal axis. This misalignment leads to complex stress distributions and deflection patterns that differ from those in symmetrical bending, and are essential for designing structures to withstand different loading conditions. In unsymmetrical bending, the neutral axis—where stress is zero—does not necessarily align with the geometric axes of the cross-section. The...
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Related Experiment Video

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Origami Inspired Self-assembly of Patterned and Reconfigurable Particles
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Origami Inspired Self-assembly of Patterned and Reconfigurable Particles

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Plug & play origami modules with all-purpose deformation modes.

Chao Zhang1,2, Zhuang Zhang1,3, Yun Peng4

  • 1School of Engineering, Westlake University, Hangzhou, Zhejiang, 310030, China.

Nature Communications
|July 19, 2023
PubMed
Summary
This summary is machine-generated.

Researchers developed a novel origami-based module for soft robots, enabling seven distinct motion modes through controlled air pressure. This plug-and-play system offers versatile deformation for complex robotic tasks.

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Area of Science:

  • Robotics and Mechanical Engineering
  • Materials Science

Background:

  • Locomotion in engineered systems relies on object deformation, including bending, twisting, and extension.
  • Controllable deformation mechanisms are crucial for developing versatile robots.

Purpose of the Study:

  • To create a novel, all-purpose deformation unit for soft robots.
  • To achieve decoupled basic and combined motion modes through a single module.

Main Methods:

  • Development of a pneumatic-driven, origami-based module.
  • Precise control of deformation modes using various pressurization schemes.
  • Assembly and integration of modules for plug-and-play functionality.

Main Results:

  • The origami module demonstrated seven distinct motion modes: three basic (bending, twisting, contraction/extension) and four combinations.
  • Modules exhibited plug-and-play characteristics, allowing assembly during operation.
  • Successful demonstration of soft robots performing complex tasks using these modules.

Conclusions:

  • The developed origami-based modules provide versatile, all-purpose deformation capabilities for soft robots.
  • This innovation opens new avenues for soft robot applications requiring complex movements.
  • The plug-and-play nature facilitates rapid prototyping and adaptation of soft robotic systems.