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Related Concept Videos

Deformation in a Circular Shaft01:10

Deformation in a Circular Shaft

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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...
440
Plastic Deformation in Circular Shafts01:20

Plastic Deformation in Circular Shafts

229
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...
229
Rotation of Asymmetric Top01:11

Rotation of Asymmetric Top

993
By definition, a spherically symmetric body has the same moment of inertia about any axis passing through its center of mass. This situation changes if there is no spherical symmetry. Since most rigid bodies are not spherically symmetric, these require special treatment.
The relationship between the angular momentum of any rigid body and its angular velocity, both of which are vectors, involves the moment of inertia. The moment of inertia is a scalar quantity only for spherically symmetric...
993
Angle of Twist: Problem Solving01:13

Angle of Twist: Problem Solving

389
An electric motor applies a torque of 700 N·m to an aluminum shaft, triggering a stable rotation. Two pulleys, B and C, are subjected to torques of 300 N·m and 400 N·m, respectively. The modulus of rigidity is provided as 25 GPa. With the knowledge of the length and diameter of each segment, the twist angle between the two pulleys can be computed. First, a section cut is made between pulleys B and C, and the cut cross-section is analyzed using a free-body diagram. Given that the...
389
Curvilinear Motion: Rectangular Components01:23

Curvilinear Motion: Rectangular Components

620
Curvilinear motion characterizes the movement of a particle or object along a curved path, notably evident when envisioning a car navigating a winding road. If the car starts at point A, its position vector is established within a fixed frame of reference, where the ratio of the position vector to its magnitude signifies the unit vector pointing in the position vector's direction.
As the car advances, its position evolves over time. Quantifying the car's velocity involves computing the...
620
Sequence Networks of Rotating Machines01:24

Sequence Networks of Rotating Machines

140
A Y-connected synchronous generator, grounded through a neutral impedance, is designed to produce balanced internal phase voltages with only positive-sequence components. The generator's sequence networks include a source voltage that is exclusively in the positive-sequence network. The sequence components of line-to-ground voltages at the generator terminals illustrate this configuration.
Zero-sequence current induces a voltage drop across the generator's neutral impedance and other...
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A model for simulating the 3D quadrangular rotary braiding process.

Haiyang Mei1, Shouzheng Sun2, Jiale Ding3

  • 1School of Mechanical and Automotive Engineering, QingDao University of Technology, QingDao, 266520, China. meihy@qut.edu.cn.

Scientific Reports
|August 24, 2025
PubMed
Summary
This summary is machine-generated.

This study introduces a simulation model for 3D quadrangular rotary braiding, enabling the creation of novel composite preform structures. The model enhances understanding of process parameters and facilitates the development of new braided fabrics.

Keywords:
3D rotary braidingFabric structureProcess modelingSimulation

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Area of Science:

  • Materials Science and Engineering
  • Manufacturing Processes
  • Textile Technology

Background:

  • 3D quadrangular rotary braiding is an efficient technique for composite preforms.
  • Current limitations in fabricating diverse structures stem from a lack of process understanding.

Purpose of the Study:

  • To develop a simulation model for the 3D quadrangular rotary braiding process.
  • To explore new braiding processes and fabric structures.
  • To overcome limitations in traditional braided fabric manufacturing.

Main Methods:

  • Depicting yarn interlacement patterns based on horn-gear and switch movements.
  • Digitizing the braiding process using a novel mixed coordinate system.
  • Establishing a process-structure model by converting carrier paths to yarn trajectories.

Main Results:

  • The model clarifies the influence of process parameters on yarn interlacement.
  • Novel braided structures, including surface-core designs, were discovered.
  • A new multi-layer interlock structure was successfully created by modifying process parameters.

Conclusions:

  • The developed model accurately simulates the 3D braiding process and its resulting structures.
  • The simulation facilitates the design of novel braided fabrics and demonstrates the technique's potential.
  • This work expands the capabilities of 3D quadrangular rotary braiding for composite preform manufacturing.