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相关概念视频

Design Example: Managing Concrete Workability01:14

Design Example: Managing Concrete Workability

84
This example deals with managing the workability of concrete for a raft foundation project under hot weather conditions. Workability is crucial for ensuring the concrete is easy to place, compact, and finish. In this scenario, a slump test — a common method to measure the workability of fresh concrete — initially indicated low workability. This was attributed to the rapid water loss from the concrete mix, exacerbated by the high temperatures causing the course aggregates to heat up.
84
Unsymmetric Loading of Thin-Walled Members: Problem Solving01:07

Unsymmetric Loading of Thin-Walled Members: Problem Solving

112
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...
112
Design Example: Sustainability in Concrete Building01:26

Design Example: Sustainability in Concrete Building

170
As the construction industry moves towards more eco-friendly practices, concrete's adaptability and its ability to incorporate sustainable features make it a key material in the drive towards greener building solutions.
There are multiple approaches to achieve sustainability in a commercial concrete building. For instance, construct a concrete parking area under the building, utilizing pervious concrete paver blocks in open areas to facilitate rainwater collection through an underground...
170
Design Example: Dimensioning of Concrete Masonry Construction01:13

Design Example: Dimensioning of Concrete Masonry Construction

101
For the construction of a storeroom using concrete masonry units, it's essential to align the dimensions of the structure with the actual sizes of the blocks and the intended mortar joints. On the site in question, there's a stockpile of concrete masonry blocks with a nominal size of eight by eight by sixteen inches, which are to be used in the construction of the storeroom.
The site engineer has laid out a plan for the storeroom with external dimensions of twelve feet in length and...
101
Three-Dimensional Force System:Problem Solving01:30

Three-Dimensional Force System:Problem Solving

674
A three-dimensional force system refers to a scenario in which three forces act simultaneously in three different directions. This type of problem is commonly encountered in physics and engineering, where it is necessary to calculate the resultant force on the system, which can then be used to predict or analyze the behavior of the object or structure under consideration.
To solve a three-dimensional force system, first resolve each force into its respective scalar components. Do this using...
674
Bending of Members Made of Several Materials01:08

Bending of Members Made of Several Materials

155
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.
Hooke's Law determines stress in each material, stating that stress is proportional to strain but varies due to each...
155

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相关实验视频

Updated: Jul 12, 2025

Structural Design and Manufacturing of a Cruiser Class Solar Vehicle
14:57

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Published on: January 30, 2019

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架构材料的机器学习支持的受约束的多目标设计.

Bo Peng1,2, Ye Wei3, Yu Qin4

  • 1State Key Laboratory of Tribology in Advanced Equipment, Tsinghua University, Beijing, China.

Nature communications
|October 19, 2023
PubMed
概括
此摘要是机器生成的。

本研究介绍了一种数据效率高的机器学习方法,用于设计先进的建筑材料. 该方法优化了3D打印的骨科植入物,与传统设计相比,实现了更高的强度和承载能力.

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科学领域:

  • 材料科学 材料科学 材料科学
  • 生物医学工程 生物医学工程
  • 计算力学 计算力学 计算力学

背景情况:

  • 建筑材料具有可调节的特性,但它们的设计复杂且依赖于专家知识.
  • 目前对建筑材料的设计流程通常是劳动密集型的,缺乏效率.
  • 为特定应用 (如骨科植入物) 优化材料需要平衡多种属性.

研究的目的:

  • 开发一个数据效率高的机器学习 (ML) 方法来优化3D打印的建筑材料.
  • 将这种ML方法应用于具有增强机械性能的骨科植入物的设计.
  • 为了证明ML指导设计适应复杂的生物结构的能力.

主要方法:

  • 使用机器学习 (ML) 循环整合有限元法 (FEM) 模拟和3D神经网络.
  • 为建筑材料开发了一个无经验的,高维的多属性优化框架.
  • 实施了一种机器-人协同方法,以适应ML设计的架构以适应特定的缺陷几何形状.

主要成果:

  • 与统一设计相比,设计的微尺度异质架构具有生物相容的弹性模量和更高的强度.
  • 在适应动物骨缺陷的植入物设计中实现了20%更高的实验承载能力.
  • 证明了ML方法能够在没有先前专家知识的情况下生成新型材料架构的能力.

结论:

  • 本文所介绍的数据效率高的ML方法使得架构材料的快速和智能设计成为可能.
  • 这种方法有助于创建具有量身定制的机械,物理和化学性能的材料.
  • 这些发现为设计先进材料提供了新的范式,特别是在骨科植入物等生物医学应用中.