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Related Concept Videos

Strain and Elastic Modulus01:15

Strain and Elastic Modulus

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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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.
Temperature Dependent Deformation01:12

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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 together...
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Dynamic Modulus of Elasticity of Concrete01:16

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Laser-heating and Radiance Spectrometry for the Study of Nuclear Materials in Conditions Simulating a Nuclear Power Plant Accident
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Polycrystalline gamma-plutonium's elastic moduli versus temperature.

I Stroe1, J B Betts, A Trugman

  • 1Department of Physics, Worcester Polytechnic Institute, Worcester, Massachusetts 01609, USA.

The Journal of the Acoustical Society of America
|February 9, 2010
PubMed
Summary
This summary is machine-generated.

This study measured the elastic properties of pure plutonium (Pu) using resonant ultrasound spectroscopy. Results show elastic moduli decrease with temperature, with a calculated Debye temperature of 144 K.

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Area of Science:

  • Materials Science
  • Solid State Physics
  • Nuclear Materials

Background:

  • Understanding the elastic properties of plutonium (Pu) is crucial for nuclear applications.
  • Pure polycrystalline plutonium in the gamma-phase exhibits complex behavior under varying temperatures.

Purpose of the Study:

  • To measure the elastic moduli and Poisson ratio of pure gamma-phase plutonium.
  • To investigate the temperature dependence of these elastic properties.
  • To compute the Debye temperature and Gruneisen parameter for gamma-Pu.

Main Methods:

  • Resonant ultrasound spectroscopy (RUS) was employed to measure elastic properties.
  • Simultaneous measurement of shear and longitudinal elastic moduli.
  • Calculation of bulk modulus, Poisson ratio, Debye temperature, and Gruneisen parameter.

Main Results:

  • A smooth, linear, and significant decrease in all elastic moduli with increasing temperature was observed.
  • The Poisson ratio increased from 0.242 at 519 K to 0.252 at 571 K.
  • An approximate Debye temperature (Theta(D)) of 144 K was calculated.

Conclusions:

  • The measured elastic properties of pure gamma-Pu align with existing data.
  • Gamma-Pu exhibits a Gruneisen parameter similar to that of copper.
  • The temperature dependence of elastic moduli provides insights into material behavior.