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Related Concept Videos

Unsymmetric Loading of Thin-Walled Members: Problem Solving01:07

Unsymmetric Loading of Thin-Walled Members: Problem Solving

138
The shear center of a channel section with uniform thickness, height, and width, is determined by computing the shear force in the member and calculating the moments of inertia of the sections.
To compute the shear forces, find the shear flow at a specific distance from the endpoint using the vertical shear and the moment of inertia values. The total shear force on the flange is calculated by integrating the shear flow from one end of the flange to the other.
Next, calculate the moments of...
138
Unsymmetric Loading of Thin-Walled Members01:23

Unsymmetric Loading of Thin-Walled Members

136
Thin-walled members with non-symmetrical cross-sections are vital to engineering structures, offering material efficiency and structural integrity. However, unsymmetrical loading on these members leads to complex stress distributions, resulting in simultaneous bending and twisting can cause deformation or structural failure. The interaction between bending and twisting requires detailed analysis to ensure structural resilience.
The concept of the shear center is crucial in countering the...
136

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Related Experiment Video

Updated: Aug 5, 2025

Fabrication of Three-Dimensional Graphene-Based Polyhedrons via Origami-Like Self-Folding
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Multimaterial 3D printed self-locking thick-panel origami metamaterials.

Haitao Ye1,2,3, Qingjiang Liu1,2, Jianxiang Cheng1,2

  • 1Shenzhen Key Laboratory of Soft Mechanics & Smart Manufacturing, Southern University of Science and Technology, Shenzhen, 518055, China.

Nature Communications
|March 24, 2023
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Summary
This summary is machine-generated.

Engineers developed a new 3D printing method for thick-panel origami structures. This technique creates robust, foldable designs with enhanced load-bearing and energy absorption capabilities for engineering applications.

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Area of Science:

  • Materials Science
  • Mechanical Engineering
  • Robotics

Background:

  • Thick-panel origami offers engineering potential but faces manufacturing limitations.
  • Current methods hinder the adoption of thick-panel origami in structural applications.
  • A need exists for efficient manufacturing of robust, foldable thick-panel origami.

Purpose of the Study:

  • To develop a novel design and manufacturing strategy for thick-panel origami structures.
  • To create structures with excellent foldability and cyclic loading resistance.
  • To enable practical structural applications of thick-panel origami.

Main Methods:

  • Utilized fused deposition modeling (FDM) multimaterial 3D printing.
  • Employed a wrapping-based fabrication strategy connecting rigid panels with soft, stretchable parts.
  • Stacked two thick-panel origami panels to form a 3D self-locking structure.

Main Results:

  • Achieved direct printing of thick-panel origami with superior foldability.
  • Demonstrated a 3D self-locking structure with push-to-pull deformation mode.
  • The structure supports over 11000 times its weight and sustains 100+ cycles of 40% compressive strain.
  • Optimized geometric parameters using a theoretical model for programmable mechanical response.

Conclusions:

  • The developed FDM-based strategy enables efficient manufacturing of high-performance thick-panel origami.
  • The 3D self-locking origami structures exhibit exceptional load-bearing capacity and durability.
  • Programmable mechanical responses and improved impact energy absorption open new avenues for structural applications.