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相关概念视频

Deformation of Member under Multiple Loadings01:11

Deformation of Member under Multiple Loadings

427
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...
427
Plastic Deformations01:19

Plastic Deformations

409
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...
409
Plastic Deformations01:14

Plastic Deformations

387
It is essential to understand how structural members behave under plastic deformation when the bending stress exceeds the material's yield strength. This state of deformation permanently alters the shape of the member, in contrast to the linear elastic behavior observed before yielding. The strain at any point in the member is expressed in terms of maximum strain. Notably, the neutral axis, which coincides with the centroid during elastic bending, shifts away from the centroid under plastic...
387
Plastic Deformations of Members with a Single Plane of Symmetry01:21

Plastic Deformations of Members with a Single Plane of Symmetry

328
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...
328
Plastic Deformation in Circular Shafts01:20

Plastic Deformation in Circular Shafts

431
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...
431
Deformation of a Beam under Transverse Loading01:15

Deformation of a Beam under Transverse Loading

682
Understanding beam deflection, particularly for indeterminate beams with overhanging segments and multiple concentrated loads, is crucial for ensuring structural integrity and functionality. The process begins with constructing an accurate free-body diagram, which helps identify the forces and moments acting on the beam. This diagram is vital for visualizing how bending moments vary along the beam's length, influencing its curvature.
The insights from the bending moment diagram extend to...
682

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相关实验视频

Updated: Jan 10, 2026

Fabrication of a Bioactive, PCL-based "Self-fitting" Shape Memory Polymer Scaffold
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基于数据挖掘的4D打印主动复合结构的变形预测.

Mengtao Wang1, Yifan Xu1, Zaiyang Liu2

  • 1Department of Electronic and Computer Engineering, Ritsumeikan University, Shiga, 525-8577, Japan.

Advanced science (Weinheim, Baden-Wurttemberg, Germany)
|November 26, 2025
PubMed
概括

一种新的数据挖掘方法能够高效准确地预测4D打印活性复合材料结构中的结构变形. 这种使用曲率驱动序列点生成 (CSPG) 的方法克服了有限元和复杂设计的深度学习方法的局限性.

关键词:
4D打印是一种4D打印.有活性的复合物 活性复合物数据挖掘是数据挖掘的一个方法.变形预测变形预测这是一个voxel组件.

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科学领域:

  • 材料科学 材料科学 材料科学
  • 计算力学 计算力学 计算力学
  • 添加剂制造 添加剂制造 添加剂制造

背景情况:

  • 4D打印使复杂的活性复合材料结构具有voxel级别的控制,扩大设计可能性.
  • 预测结构变形变得具有挑战性,因为设计空间的指数增长与越来越多的voxels.
  • 如有限元分析 (FEA) 和深度学习 (DL) 等现有方法对这些复杂结构的效率,准确性或概括性有局限性.

研究的目的:

  • 开发一个可扩展和高效的变形预测方法,用于voxelized主动复合结构.
  • 解决传统的FEA和DL方法在预测速度,准确性和概括性方面的局限性.
  • 创建一个可访问的平台,用于预测复杂智能结构中的结构变形.

主要方法:

  • 建议采用基于数据挖掘的方法,从手动提取的特征构建一个特征数据库.
  • 引入了曲率驱动的序列点生成 (CSPG) 算法,用于预测任意长度的voxel编码的变形.
  • 为用户定制和端到端预测开发了一个交互式基于Web的平台.

主要成果:

  • 提出的方法显著提高了预测效率,在一秒内完成任务,超过FEA.
  • 与DL方法相比,它提高了预测准确性,并解决了它们有限的概括能力.
  • 该CSPG算法有效预测复杂的voxel编码的变形.

结论:

  • 基于数据挖掘的方法为4D打印活性复合材料结构的变形预测提供了高效和准确的解决方案.
  • 这种方法克服了现有的FEA和DL方法的关键局限性,提供了更好的概括性.
  • 开发的平台是复杂智能结构的最佳设计的宝贵工具.