Jove
Visualize
联系我们
JoVE
x logofacebook logolinkedin logoyoutube logo
关于 JoVE
概览领导团队博客JoVE 帮助中心
作者
出版流程编辑委员会范围与政策同行评审常见问题投稿
图书馆员
用户评价订阅访问资源图书馆顾问委员会常见问题
研究
JoVE JournalMethods CollectionsJoVE Encyclopedia of Experiments存档
教育
JoVE CoreJoVE BusinessJoVE Science EducationJoVE Lab Manual教师资源中心教师网站
使用条款与条件
隐私政策
政策

相关概念视频

Microcracking in Concrete01:20

Microcracking in Concrete

100
Microcracking in concrete refers to the tiny cracks that can form within the material even before any external load is applied. These microcracks typically occur at the interface between the coarse aggregate and the hydrated cement paste, often as a result of differential volume changes prompted by variations in stress-strain behavior, as well as thermal and moisture movement. Initially, these microcracks remain stable and do not grow substantially until the concrete is stressed to about 30...
100
Behavior of Concrete Under Compressive Load01:23

Behavior of Concrete Under Compressive Load

143
Concrete exhibits specific behaviors under different compressive loads. Understanding this is crucial for understanding its structural integrity. When concrete undergoes uniaxial compression, it tends to develop cracks that run parallel to the direction of the force. These parallel cracks stem from localized tensile stresses that occur perpendicular to the compression direction. Additionally, angled cracks may appear due to the formation of shear planes.
As the concrete specimen fractures under...
143
Types of Non-structural Cracks in Concrete01:28

Types of Non-structural Cracks in Concrete

125
Non-structural cracks are primarily of three types: plastic, early-age thermal, and drying shrinkage cracks. Plastic cracks are further classified into plastic shrinkage cracks and plastic settlement cracks.
Plastic shrinkage cracks typically form within hours after the concrete is poured. The concrete's surface dries faster than the bottom, creating tensile stress that the still-plastic concrete cannot withstand, leading to diagonal or randomly patterned cracks on the concrete surface.
125
Stress Concentrations01:24

Stress Concentrations

273
Stress concentration is when stress intensifies near discontinuities such as holes or abrupt cross-sectional changes in a structural member. This localized stress can often surpass the average stress within the member. The stress distribution in flat bars, either with a circular hole or varying widths connected by fillets, can be determined experimentally using a photoelastic method. The results are based on ratios of geometric parameters like the ratio of the hole's radius to the smaller...
273
Deformations in a Transverse Cross Section01:21

Deformations in a Transverse Cross Section

172
When a material is subjected to uniaxial stress, it elongates or contracts in the direction of the applied force, and also undergoes changes in the perpendicular directions. This behavior is crucial for understanding how materials behave under stress and is governed by mechanical properties such as Poisson's ratio v, which measures the ratio of transverse strain to axial strain.
As the material stretches, it expands or contracts in orthogonal directions to the load. This phenomenon varies...
172
Unsymmetric Loading of Thin-Walled Members01:23

Unsymmetric Loading of Thin-Walled Members

98
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...
98

您也可能阅读

相关文章

通过共同作者、期刊和引用图与本文相关的文章。

排序
Same author

A cellular-meso-macro three-scale approach captures remodelling of cancellous bone in health and disease.

Biomechanics and modeling in mechanobiology·2025
Same author

A novel micromorphic approach captures non-locality in continuum bone remodelling.

Computer methods in biomechanics and biomedical engineering·2023
Same author

A peridynamic formulation for nonlocal bone remodelling.

Computer methods in biomechanics and biomedical engineering·2022
Same author

Risk Assessment of Infection by Airborne Droplets and Aerosols at Different Levels of Cardiovascular Activity.

Archives of computational methods in engineering : state of the art reviews·2021
Same author

Wrinkling instabilities in soft bilayered systems.

Philosophical transactions. Series A, Mathematical, physical, and engineering sciences·2017
Same author

On nonlinear thermo-electro-elasticity.

Proceedings. Mathematical, physical, and engineering sciences·2016

相关实验视频

Updated: Jun 4, 2025

Quasistatic Mechanical Testing for Computer-Aided Design and Manufacturing Occlusal Veneers Cemented to Milled Dentin Analog Material
07:42

Quasistatic Mechanical Testing for Computer-Aided Design and Manufacturing Occlusal Veneers Cemented to Milled Dentin Analog Material

Published on: December 20, 2024

311

交叉连接度的变化可以通过横向裂纹编程和控制软骨折.

Miguel Angel Moreno-Mateos1, Paul Steinmann1,2

  • 1Institute of Applied Mechanics, Friedrich-Alexander-Universität Erlangen-Nürnberg, Egerlandstr. 5, 91058 Erlangen, Germany.

npj computational materials
|December 19, 2024
PubMed
概括

软聚合物中的交叉连接程度会影响断裂行为,而更高的交叉连接会促进横向裂纹. 这项研究开发了一个模型来控制软材料中的断裂异构性,以提高性.

科学领域:

  • 材料科学 材料科学 材料科学
  • 聚合物物理 聚合物物理
  • 断裂力学 断裂力学 断裂力学

背景情况:

  • 软材料的大型变形导致复杂的断裂行为,包括异构性.
  • 断裂异质性,如横向裂,与微观结构变化和应变诱导的结晶有关.
  • 交叉连接度对弹性体中断裂异性质的影响尚未完全理解.

研究的目的:

  • 研究柔软弹性体中的交叉连接度和断裂异构性之间的关系.
  • 探索控制从前向向侧向裂纹过渡的合成参数.
  • 开发一个计算框架来预测软复合材料的断裂行为.

主要方法:

  • 对Elastosil P7670具有不同度的交叉连接的实验性表征.
  • 开发一种新的相场模型,用于结合依赖交叉连接的临界能量释放率的断裂.
  • 复合软结构的计算模拟,具有不同的交联密度.

主要成果:

  • 在Elastosil P7670中,横向裂纹的趋势随着交叉连接的程度而增加.
  • 为了在前向和侧向断裂模式之间进行过渡,确定了特定的混合比率.
  • 阶段场模型准确地预测复合结构中的断裂行为.
关键词:
计算方法 计算方法工程 工程师 工程师 工程师机械性质 机械性质聚合物 聚合物 聚合物

更多相关视频

Performing Microscope-Mounted Y-Shaped Cutting Tests
06:15

Performing Microscope-Mounted Y-Shaped Cutting Tests

Published on: January 20, 2023

1.7K
Full-field Strain Measurements for Microstructurally Small Fatigue Crack Propagation Using Digital Image Correlation Method
07:37

Full-field Strain Measurements for Microstructurally Small Fatigue Crack Propagation Using Digital Image Correlation Method

Published on: January 16, 2019

9.6K

相关实验视频

Last Updated: Jun 4, 2025

Quasistatic Mechanical Testing for Computer-Aided Design and Manufacturing Occlusal Veneers Cemented to Milled Dentin Analog Material
07:42

Quasistatic Mechanical Testing for Computer-Aided Design and Manufacturing Occlusal Veneers Cemented to Milled Dentin Analog Material

Published on: December 20, 2024

311
Performing Microscope-Mounted Y-Shaped Cutting Tests
06:15

Performing Microscope-Mounted Y-Shaped Cutting Tests

Published on: January 20, 2023

1.7K
Full-field Strain Measurements for Microstructurally Small Fatigue Crack Propagation Using Digital Image Correlation Method
07:37

Full-field Strain Measurements for Microstructurally Small Fatigue Crack Propagation Using Digital Image Correlation Method

Published on: January 16, 2019

9.6K

结论:

  • 在软聚合物中,通过控制合成过程中的交叉连接度,可以有效调节折断异构性.
  • 具有量身定制的交叉连接的复合软结构提供了增强的断裂耐受性和可调节的刚性.
  • 开发的计算框架作为一个虚拟的测试台,用于设计具有优越断裂阻力的先进软材料.