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相关概念视频

Temperature Dependent Deformation01:12

Temperature Dependent Deformation

147
In a nonhomogeneous rod made up of steel and brass, restrained at both ends and subjected to a temperature change, several steps are involved in calculating the stress and compressive load. Due to the problem's static indeterminacy, one end support is disconnected, allowing the rod to experience the temperature change freely. Next, an unknown force is applied at the free end, triggering deformations in the rod's steel and brass portions. These deformations are then calculated and added...
147
Thermal Strain01:19

Thermal Strain

998
Thermal strain is a concept that arises when we consider how temperature changes affect structures. Unlike the conventional assumption that structures remain constant under load, real-world scenarios often involve temperature fluctuations that can significantly impact these structures. Consider a homogeneous rod with a uniform cross-section resting freely on a flat horizontal surface. If the rod's temperature increases, the rod elongates. This elongation is proportional to the temperature...
998
Thermal expansion and Thermal stress: Problem Solving01:27

Thermal expansion and Thermal stress: Problem Solving

1.2K
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...
1.2K

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相关实验视频

Updated: Jun 28, 2025

Experimental Methods for Investigation of Shape Memory Based Elastocaloric Cooling Processes and Model Validation
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一种增强的温度控制方法来模拟配置外挤压.

João Vidal1, João Miguel Nóbrega2

  • 1Soprefa-Componentes Industriais SA, R. Alfredo Henriques, 4520-909 Mosteiró, Portugal.

Polymers
|April 13, 2024
PubMed
概括
此摘要是机器生成的。

这项研究引入了一种用于热塑性挤出的新型多区域建模方法,提高了温度控制的准确性. 新方法提高了模拟精度,克服了现有的计算机辅助工程工具的局限性,以提高产品质量.

关键词:
开放式的泡边界条件的边界条件是配置文件挤出模具的死亡控制温度的温度控制器

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相关实验视频

Last Updated: Jun 28, 2025

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科学领域:

  • 材料科学与工程 材料科学与工程
  • 计算流体动力学的流体动力学.
  • 工艺工程是过程工程.

背景情况:

  • 热塑性挤出需要精确的温度控制,以获得最佳的产品质量.
  • 当前的计算机辅助工程工具经常呈现简化的温度分布模型,导致模拟过程的差异.
  • 精确的热管理对于高效可靠的热塑性挤出至关重要.

研究的目的:

  • 开发一个先进的多区域建模方法用于热塑性挤出.
  • 为了提高挤出工艺中温度分布模拟的准确性.
  • 为了弥合模拟和现实世界的挤出条件之间的差距.

主要方法:

  • 在OpenFOAM计算库中开发了一种短暂的,不可压缩的,非同热溶解器.
  • 使用实时热电偶数据实现了一个专门的边界条件,模拟PID控制.
  • 采用多区域建模策略,以结合现实的温度控制参数.

主要成果:

  • 在流通道壁上发现了显著的温度偏差.
  • 在挤出系统中观察到总压力下降的变化.
  • 在稳定状态条件下,对出口速度和流量均性的影响最小.

结论:

  • 新的多区域建模方法显著提高了对热塑性挤出中的热动态的理解.
  • 该方法为改善挤出工艺中的温度控制策略提供了关键的见解.
  • 这项研究为热塑性挤压中更精确,更有效的操作策略奠定了基础.