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Related Concept Videos

Measurements of Strain01:27

Measurements of Strain

2.6K
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...
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Thermal Strain01:19

Thermal Strain

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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...
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Shearing Strain01:20

Shearing Strain

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The shearing strain represents a cubic element's angular change when subjected to shearing stress. This type of stress can transform a cube into an oblique parallelepiped without influencing normal strains. The cubic element experiences a significant transformation when exposed solely to shearing stress. Its shape alters from a perfect cube into a rhomboid, clearly demonstrating the effect of shearing strain. The degree of this strain is considered positive if it reduces the angle between the...
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Strain Energy01:13

Strain Energy

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Strain energy is a fundamental concept in the field of materials science and structural engineering, describing the energy absorbed by a material or structure when it is deformed under load.
Consider a rod that is fixed at one end and subjected to an axial force at the free end. This axial force induces stress within the rod, leading to its elongation. As the axial force increases, so does the elongation of the rod, illustrating a direct relationship between the force applied and the resulting...
936
Dynamic Equilibrium02:20

Dynamic Equilibrium

62.0K
A reversible chemical reaction represents a chemical process that proceeds in both forward (left to right) and reverse (right to left) directions. When the rates of the forward and reverse reactions are equal, the concentrations of the reactant and product species remain constant over time and the system is at equilibrium. A special double arrow is used to emphasize the reversible nature of the reaction. The relative concentrations of reactants and products in equilibrium systems vary greatly;...
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Stress-Strain Diagram01:10

Stress-Strain Diagram

2.3K
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...
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Dynamic Measurements Using FDM 3D-Printed Embedded Strain Sensors.

Marco Maurizi1, Janko Slavič2, Filippo Cianetti3

  • 1Department of Engineering, University of Perugia, Goffredo Duranti 93, 06125 Perugia, Italy. marcomaurizi06@gmail.com.

Sensors (Basel, Switzerland)
|June 20, 2019
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Summary

This study explores dynamic measurements using 3D-printed strain sensors made from conductive Polylactic Acid (PLA). Results show these sensors offer reliable performance for dynamic strain sensing in various applications.

Keywords:
3D-printingdynamic measurementsembedded sensorsfused deposition modelingsmart structuresstrain sensors

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Area of Science:

  • Materials Science
  • Engineering
  • Sensor Technology

Background:

  • 3D-printing enables co-printing of sensory elements, but dynamic performance remains under-researched.
  • Conductive Polylactic Acid (PLA) is a promising material for embedded strain sensors.

Purpose of the Study:

  • To investigate the dynamic performance of 3D-printed smart structures with embedded strain sensors.
  • To evaluate the suitability of conductive PLA for dynamic strain measurements.

Main Methods:

  • Developed smart 3D structures with embedded conductive PLA strain sensors.
  • Investigated piezoresistivity, temperature effects, linearity, dynamic range, electromagnetic sensitivity, and frequency response.
  • Utilized quasi-static calibration for dynamic measurements.

Main Results:

  • Temperature effects on the sensor were found to be negligible.
  • The sensor exhibited linear behavior when the structure's response was linear.
  • The dynamic range commenced around 30 μϵ.
  • Broadband performance extended to a few kHz, dependent on sensor size.

Conclusions:

  • 3D-printed conductive PLA strain sensors show potential for dynamic measurements.
  • These sensors could be viable alternatives to piezo-crystal sensors in specific applications.
  • Further research supports the use of smart 3D-printed systems in dynamic sensing.