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Related Concept Videos

Strain and Elastic Modulus01:15

Strain and Elastic Modulus

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The quantity that describes the deformation of a body under stress is known as strain. Strain is given as a fractional change in either length, volume, or geometry under tensile, volume (also known as bulk), or shear stress, respectively, and is a dimensionless quantity. The strain experienced by a body under tensile or compressive stress is called tensile or compressive strain, respectively. In contrast, the strain experienced under bulk stress and shear stress is known as volume and shear...
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Hooke's Law01:26

Hooke's Law

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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.
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Measurements of Strain01:27

Measurements of Strain

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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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Generalized Hooke's Law01:22

Generalized Hooke's Law

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The generalized Hooke's Law is a broadened version of Hooke's Law, which extends to all types of stress and in every direction. Consider an isotropic material shaped into a cube subjected to multiaxial loading. In this scenario, normal stresses are exerted along the three coordinate axes. As a result of these stresses, the cubic shape deforms into a rectangular parallelepiped. Despite this deformation, the new shape maintains equal sides, and there is a normal strain in the direction of the...
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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...
747
Relation between Poisson's ratio, Modulus of Elasticity and Modulus of Rigidity01:15

Relation between Poisson's ratio, Modulus of Elasticity and Modulus of Rigidity

373
Deformation occurs in axial and transverse directions when an axial load is applied to a slender bar. This deformation impacts the cubic element within the bar, transforming it into either a rectangular parallelepiped or a rhombus, contingent on its orientation. This transformation process induces shearing strain. Axial loading elicits both shearing and normal strains. Applying an axial load instigates equal normal and shearing stresses on elements oriented at a 45° angle to the load axis.
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Related Experiment Video

Updated: Oct 23, 2025

Biomechanical Characterization of Human Soft Tissues Using Indentation and Tensile Testing
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Biomechanical Characterization of Human Soft Tissues Using Indentation and Tensile Testing

Published on: December 13, 2016

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Haptically Quantifying Young's Modulus of Soft Materials Using a Self-Locked Stretchable Strain Sensor.

Zequn Cui1, Wensong Wang2, Lingling Guo3

  • 1Innovative Centre for Flexible Devices (iFLEX), Max Planck-NTU Joint Lab for Artificial Senses, School of Materials Science and Engineering, Nanyang Technological University, 50 Nanyang Avenue, Singapore, 639798, Singapore.

Advanced Materials (Deerfield Beach, Fla.)
|August 23, 2021
PubMed
Summary
This summary is machine-generated.

Researchers developed a new fingertip sensor for rapid Young

Keywords:
Young's modulushapticsself-lockingstretchable strain sensors

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Area of Science:

  • Materials Science
  • Biomedical Engineering
  • Robotics

Background:

  • Accurate Young's modulus measurement of soft materials is crucial for various applications.
  • Existing portable and wearable methods often require bulky equipment and complex procedures.
  • Miniaturized, user-friendly platforms for real-time elasticity sensing are needed.

Purpose of the Study:

  • To introduce a novel, rapid method for quantifying the Young's modulus of soft materials.
  • To develop a miniaturized, haptic measurement platform adaptable to diverse scenarios.
  • To enhance the tactile sensing capabilities of prosthetic devices.

Main Methods:

  • Development of a self-locked stretchable strain sensor for haptic quantification.
  • Integration of the sensor into a fingertip measurement platform.
  • Demonstration of the platform's ability to measure Young's modulus (kPa-MPa) rapidly.

Main Results:

  • The novel method enables quick and simple Young's modulus measurements.
  • The fingertip platform provides human-comparable haptic elasticity sensing.
  • The system operates without activity constraints, offering high convenience.

Conclusions:

  • A universal strategy for ultraconvenient and high-efficiency Young's modulus measurements is presented.
  • The technology offers wide adaptability for applications in various fields.
  • This advancement paves the way for unprecedented applications in soft material analysis and prosthetics.