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相关概念视频

Stress-Strain Diagram - Brittle Materials01:24

Stress-Strain Diagram - Brittle Materials

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Brittle materials, including glass, cast iron, and stone, exhibit unique characteristics. They fracture without considerable change in their elongation rate, indicating that their breaking and ultimate strength are equivalent. Such materials also show lower strain levels at the point of rupture. The failure in brittle materials predominantly results from normal stresses, as evidenced by the rupture created along a surface perpendicular to the applied load. These materials do not display...
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Types of Fluids01:27

Types of Fluids

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Fluids can be classified into Newtonian and non-Newtonian fluids based on their response to shear stress. Newtonian fluids have a linear relationship between shear stress and the shear strain rate, following Newton's law of viscosity. Their viscosity remains constant regardless of the shear rate, making their behavior predictable and easier to analyze. Common examples include water, air, oil, and gasoline.
In contrast, non-Newtonian fluids do not follow Newton's law of viscosity, and...
500
Plastic Behavior01:21

Plastic Behavior

270
A material's elastic behavior is characterized by the disappearance of stress once the load is removed, allowing the material to return to its original state. However, when stress surpasses the yield point, yielding commences, marking the onset of plastic deformation or permanent set. This change from elastic to plastic behavior is influenced by the peak stress value and the duration before the load is removed. An intriguing observation occurs when a specimen is loaded, unloaded, and...
270
Yield Criteria for Ductile Materials under Plane Stress01:25

Yield Criteria for Ductile Materials under Plane Stress

218
In designing structural elements and machine parts using ductile materials, it is crucial to ensure that these components withstand applied stresses without yielding. Yielding is initially determined through a tensile test, which evaluates the material's response to uniaxial stress. However, tensile stress is insufficient when components face biaxial or plane stress conditions This condition requires advanced criteria to predict failure.
The Maximum Shearing Stress Criterion, also known as...
218
Stress-Strain Diagram - Ductile Materials01:24

Stress-Strain Diagram - Ductile Materials

984
The stress-strain relationship in ductile materials such as structural steel or aluminium is intricate and progresses through several stages. When a specimen is loaded, it initially exhibits a linear length increase, depicted by a steep straight line on the stress-strain diagram. It indicates the material is elastically deforming and will return to its original shape once unloaded. However, when a critical stress value is reached, plastic deformation begins. This stage sees substantial...
984
Problem Solving on Stress and Strain01:22

Problem Solving on Stress and Strain

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Stress is a quantity that describes the magnitude of a force that causes deformation, generally defined as internal force per unit area. When forces pull on an object and cause its elongation, like the stretching of an elastic band, it is called tensile stress. When forces cause the compression of an object, it is known as compressive stress. When an object is being squeezed uniformly from all sides, like a submarine in the depths of the ocean, we call this kind of stress bulk stress (or volume...
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相关实验视频

Updated: Sep 16, 2025

Macro-Rheology Characterization of Gill Raker Mucus in the Silver Carp, Hypophthalmichthys molitrix
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颗粒状基是脆弱的,因此产生应力流体.

Gunnar B Thompson1,2, Jiye Lee1, Krutarth M Kamani1

  • 1Dept. Chemical and Biomolecular Engineering, University of Illinois Urbana-Champaign, 600 S Mathews Ave, Urbana, IL, 61801, USA.

Advanced materials (Deerfield Beach, Fla.)
|July 10, 2025
PubMed
概括

这项研究揭示了颗粒状水凝作为脆性产量应力流体,使用卡马尼-多尼利-罗杰斯 (KDR) 模型与脆性 (Bt) 量化. 这个框架有助于设计用于生物医学应用的水凝,例如3D生物打印.

关键词:
易碎性 易碎性 易碎性有颗粒状的水凝.这是一种颗粒状混合物.康复 复原 复原 复原 复原 复原这是一种自我愈合的疗法.

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Fragmenting Bulk Hydrogels and Processing into Granular Hydrogels for Biomedical Applications
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科学领域:

  • 材料科学 材料科学 材料科学
  • 类风病学 类风病学 类风病学
  • 生物医学工程 生物医学工程

背景情况:

  • 颗粒状水凝在生物医学领域至关重要.
  • 现有的风湿学方法往往忽视了暂时的屈服和不屈服的行为.
  • 对于先进的应用,需要对颗粒状水凝类风湿学有全面的了解.

研究的目的:

  • 为了描述颗粒状水凝的稳定和短暂的形学.
  • 将Kamani-Donley-Rogers (KDR) 模型与脆性 (Bt) 应用于颗粒状水凝.
  • 确定关键的微凝属性和影响风湿行为的颗粒状成分.

主要方法:

  • 使用振荡剪切测试与卡马尼-唐利-罗杰斯 (KDR) 模型和脆性 (Bt) 结合使用.
  • 研究的聚乙烯甘醇和凝微凝具有不同的特性和颗粒状成分.
  • 定量化稳定状态和短暂的风湿学参数.

主要成果:

  • 颗粒状水凝表现出具有脆性,产生应力流体的行为.
  • 带有Bt的KDR模型有效地捕捉了各种参数的颗粒状水凝类风湿学.
  • 在组成和弹性模量,结构粘度和脆性之间观察到单调的关系.
  • 与单质水凝相比,混合物表现出较低的产量压力.
  • 微凝尺寸分布和聚合物分量在单质水凝中最具影响力.

结论:

  • 带有Bt的KDR模型为了解颗粒状水凝类风湿学提供了定量框架.
  • 这一框架对于水凝的合理设计至关重要,用于诸如注射,现场稳定和3D生物打印等应用.
  • 这项研究强调了水凝设计中短暂的质性质的重要性.