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相关概念视频

Measurements of Strain01:27

Measurements of Strain

1.0K
Strain quantifies the deformation of a material under force, typically measured as normal strain, which represents the change in length when compared with the original length. Electrical strain gauges are used for enhanced accuracy. These devices consist of a conductive wire mounted on a paper backing that adheres to the material's surface. These gauges operate on the piezoresistive effect, where the wire's electrical resistance changes in response to mechanical deformation. The strain...
1.0K
Design Example: Strain Gauge Bridge or Wheatstone Bridge01:15

Design Example: Strain Gauge Bridge or Wheatstone Bridge

414
The utilization of strain gauges as transducers for converting mechanical strain into electrical signals is a common practice in various engineering applications. These strain gauges are frequently integrated into Wheatstone bridge circuits to accurately measure parameters such as force or pressure. Within this context, each element within the circuit exhibits a resistance that undergoes subtle variations when subjected to mechanical strain. The primary objective is to convert minuscule...
414
Stress-Strain Diagram01:10

Stress-Strain Diagram

664
A stress-strain diagram is a crucial tool that graphically displays a material's mechanical characteristics. This diagram is derived from a tensile test performed on a carefully prepared cylindrical specimen. The specimen has two gauge marks inscribed on its central part, and the distance between these marks is known as the gauge length. The cylindrical specimen is placed in a testing machine, which applies an increasing centric load. As this load grows, so does the gauge length. This...
664
Uncertainty in Measurement: Reading Instruments02:46

Uncertainty in Measurement: Reading Instruments

38.3K
Counting is the type of measurement that is free from uncertainty, provided the number of objects being counted does not change during the process. Such measurements result in exact numbers. By counting the eggs in a carton, for instance, one can determine exactly how many eggs are there in the carton. Similarly, the numbers of defined quantities are also exact. For example, 1 foot is exactly 12 inches, 1 inch is exactly 2.54 centimeters, and 1 gram is exactly 0.001 kilograms. Quantities...
38.3K
True Stress and True Strain01:28

True Stress and True Strain

322
Engineering stress is calculated as the load divided by the original, undeformed cross-sectional area. It approximates a material under load. This approximation is especially relevant post-yield in ductile materials. Though engineering stress-strain diagrams are often used for their convenience and accessibility, they can sometimes fall short in accuracy, particularly when dealing with large strain values.
In contrast, true stress offers a more precise portrayal. It is computed by dividing the...
322
Temperature Dependent Deformation01:12

Temperature Dependent Deformation

150
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...
150

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相关实验视频

Updated: Jul 11, 2025

A Coupled Experiment-finite Element Modeling Methodology for Assessing High Strain Rate Mechanical Response of Soft Biomaterials
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A Coupled Experiment-finite Element Modeling Methodology for Assessing High Strain Rate Mechanical Response of Soft Biomaterials

Published on: May 18, 2015

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使用蒙特卡洛方法论对应变量测量的不确定性模型.

Matthias Haslbeck1, Jörg Böttcher1, Thomas Braml1

  • 1Universität der Bundeswehr München, Werner-Heisenberg-Weg 39, D-85577 Neubiberg, Germany.

Sensors (Basel, Switzerland)
|November 14, 2023
PubMed
概括
此摘要是机器生成的。

本研究提出了一种方法,用于评估机械系统在电压力表测量的不确定性. 该方法使用蒙特卡洛模拟来模拟影响因素和非线性,帮助实际的工程应用.

关键词:
,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,蒙特卡洛模拟的蒙特卡洛模拟电力应变测量电力应变测量全球敏感性分析测量不确定性 测量不确定性模型更新 模型更新

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Intermediate Strain Rate Material Characterization with Digital Image Correlation
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Intermediate Strain Rate Material Characterization with Digital Image Correlation

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Split Point Analysis and Uncertainty Quantification of Thermal-Optical Organic/Elemental Carbon Measurements
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Split Point Analysis and Uncertainty Quantification of Thermal-Optical Organic/Elemental Carbon Measurements

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相关实验视频

Last Updated: Jul 11, 2025

A Coupled Experiment-finite Element Modeling Methodology for Assessing High Strain Rate Mechanical Response of Soft Biomaterials
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Intermediate Strain Rate Material Characterization with Digital Image Correlation
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Intermediate Strain Rate Material Characterization with Digital Image Correlation

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科学领域:

  • 机械工程 机械工程
  • 计量学 计量学 计量学
  • 土木工程 土木工程是指土木工程.

背景情况:

  • 精确的机械系统验证依赖于精确的测量.
  • 了解测量不确定性对于可靠的数据至关重要.
  • 电力应变计被广泛使用,但需要仔细评估不确定性.

研究的目的:

  • 开发和介绍一种实用的方法,用于评估使用电力应变计测量的不确定性.
  • 模拟关键影响因素,包括非线性和环境条件.
  • 将该方法应用于静态负载下的大跨度公路桥上的应变测量.

主要方法:

  • 基本测量模型的演,包括主要影响因素及其不确定性.
  • 输入的统计建模和潜在的物理关系.
  • 蒙特卡洛模拟用于不确定性传播的应用.
  • 基于变异的灵敏度分析,以评估非线性和因素重要性.
  • 试验量化标杆错位效应. 标杆错位效应的实验量化.

主要成果:

  • 开发了一个全面的方案,用于评估不确定性在应变测量.
  • 量化了非线性,环境条件和标尺错位的影响.
  • 灵敏度分析确定了影响测量不确定性分布的关键因素.
  • 该方法在现实世界的桥梁工程项目中展示了实际的应用性.

结论:

  • 开发的方法为评估应变测量不确定性提供了一个强大的框架.
  • 它简化了这个过程,需要在分析不确定性推导方面最少的专业知识.
  • 该方案可适应各种工程应用和要求.
  • 精确的不确定性量化提高了机械系统验证的可靠性.