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相关概念视频

Members Made of Elastoplastic Material01:19

Members Made of Elastoplastic Material

94
The behavior of elastoplastic materials under bending stresses, particularly in structural members with rectangular cross-sections, is crucial for predicting material responses and understanding failure modes. Initially, when a bending moment is applied, the stress distribution across the section follows Hooke's Law and is linear and elastic. This distribution means the stress increases from the neutral axis to the maximum at the outer fibers, up to the elastic limit.
As the bending moment...
94
Thermal expansion and Thermal stress: Problem Solving01:27

Thermal expansion and Thermal stress: Problem Solving

1.1K
San Francisco's Golden Gate Bridge is exposed to temperatures ranging from -15 °C to 40 °C. At its coldest, the main span of the bridge is 1275 m long. Assuming that the bridge is made entirely of steel, what is the change in its length between these temperatures?
To solve the problem, first, identify the known and unknown quantities. The initial length (L) of the bridge is 1275 m, the coefficient of linear expansion (α) for steel is 12 x 10-6/°C, and the change in...
1.1K
Bending of Members Made of Several Materials01:08

Bending of Members Made of Several Materials

145
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...
145
Plastic Behavior01:21

Plastic Behavior

193
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...
193
Elastic Strain Energy for Shearing Stresses01:20

Elastic Strain Energy for Shearing Stresses

173
As discussed in previous lessons, strain energy in a material is the energy stored when it is elastically deformed, a concept crucial in materials science and mechanical engineering. This energy results from the internal work done against the cohesive forces within the material. When a material undergoes shearing stress and corresponding shearing strain, the strain energy density, which is the energy stored per unit volume, is calculated. Within the elastic limit, where the stress is...
173
Hooke's Law01:26

Hooke's Law

360
Hooke's law, a pivotal principle in material science, establishes that the strain a material undergoes is directly proportional to the applied stress, defined by a factor called the modulus of elasticity or Young's modulus.
360

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相关实验视频

Updated: Jun 16, 2025

Experimental Methods for Investigation of Shape Memory Based Elastocaloric Cooling Processes and Model Validation
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Experimental Methods for Investigation of Shape Memory Based Elastocaloric Cooling Processes and Model Validation

Published on: May 2, 2016

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使用用户材料接口实现循环热力学elasto-viscoplasticity.

Marko Nagode1, Simon Oman1, Jernej Klemenc1

  • 1University of Ljubljana, Faculty of Mechanical Engineering, Aškerčeva 6, SI-1000 Ljubljana, Slovenia.

Materials (Basel, Switzerland)
|June 13, 2025
PubMed
概括
此摘要是机器生成的。

本研究介绍了Abaqus的用户材料,详细介绍了elasto-viscoplasticity建模. 多轴普兰特尔操作员方法为复杂的热力学条件提供了高效的实现和数值稳定性.

关键词:
爬行 爬行 爬行 爬行 爬行 爬行消散的能量是消散的能量.拉斯托 - 粘性可塑性疲劳 疲劳 疲劳 疲劳 疲劳 疲劳有限元素方法的有限元素方法.热力机械加载 热力机械加载

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Characterizing Dissipative Elastic Metamaterials Produced by Additive Manufacturing
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Last Updated: Jun 16, 2025

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科学领域:

  • 计算力学是计算力学.
  • 材料科学 是一种材料科学.
  • 有限元素分析的研究.

背景情况:

  • 在像Abaqus这样的有限元素分析 (FEA) 软件中实现复杂的构成方程,会带来重大的数值挑战.
  • 有效的风学模型实现需要详细的算法描述超出构成方程导出.

研究的目的:

  • 为Abaqus引入一种在热力学条件下模拟elasto-viscoplasticity的用户材料.
  • 为多轴普兰特尔操作员方法提供详细的算法,解决数值挑战并确保稳定性.
  • 展示开发模型在分析结构组件中的实际应用.

主要方法:

  • 对elasto-viscoplasticity的构成方程的推导和实现.
  • 为Abaqus.com开发一个用户材料子程序.
  • 应用多轴普兰特尔运算子方法用于数值计算.
  • 详细解释数字代码子程序和稳定性解决方案.
  • 在联合负载条件下对穿孔板进行分析.

主要成果:

  • 成功开发了一个用于Abaqus模拟elasto-viscoplasticity的强大的用户材料.
  • 多轴普兰特尔操作员方法可方便有效计算疲劳,爬行损伤和消耗能量.
  • 数字稳定性是通过详细的子程序解释和证明的解决方案来实现的.
  • 该模型的实际实用性通过对穿孔板的分析来验证.

结论:

  • 开发的用户材料和多轴普兰特尔运算机方法显著增强了有限元素方法中的elasto-viscoplasticity的计算建模.
  • 这项工作为模拟不同热力学负荷下的复杂材料行为提供了有价值的工具.
  • 该方法简化了各种损坏指标和能量消耗的计算,有效地整合了单轴方法.