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Related Concept Videos

Plastic Deformations01:19

Plastic Deformations

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Plastic deformation represents a fundamental concept in materials science, which explains the irreversible change in the shape of a material when it experiences stress beyond its elastic capability. This phenomenon is important in structural engineering, especially in designing and analyzing cantilever beams—structures that are securely fixed at one end and bear loads at the opposite end. When these beams are subjected to loads within their elastic range, they will return to their...
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Plastic Deformations01:14

Plastic Deformations

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It is essential to understand how structural members behave under plastic deformation when the bending stress exceeds the material's yield strength. This state of deformation permanently alters the shape of the member, in contrast to the linear elastic behavior observed before yielding. The strain at any point in the member is expressed in terms of maximum strain. Notably, the neutral axis, which coincides with the centroid during elastic bending, shifts away from the centroid under plastic...
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Temperature Dependent Deformation01:12

Temperature Dependent Deformation

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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...
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Deformations in a Symmetric Member in Bending01:18

Deformations in a Symmetric Member in Bending

518
When analyzing the deformation of a symmetric prismatic member subjected to bending by equal and opposite couples, it becomes clear that as the member bends, the originally straight lines on its wider faces curve into circular arcs, with a constant radius centered at a point known as Point C. This phenomenon helps to understand the stress and strain distribution within the member more clearly.
When the member is segmented into tiny cubic elements, it is observed that the primary stress...
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Deformation of Member under Multiple Loadings01:11

Deformation of Member under Multiple Loadings

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When a rod is made of different materials or has various cross-sections, it must be divided into parts that meet the necessary conditions for determining the deformation. These parts are each characterized by their internal force, cross-sectional area, length, and modulus of elasticity. These parameters are then used to compute the deformation of the entire rod.
In the case of a member with a variable cross-section, the strain is not constant but depends on the position. The deformation of an...
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Deformation in a Circular Shaft01:10

Deformation in a Circular Shaft

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One of the distinctive characteristics of circular shafts is their ability to maintain their cross-sectional integrity under torsion. In other words, each cross-section continues to exist as a flat, unaltered entity, simply rotating like a solid, rigid slab. To understand the distribution of shearing stress within such a shaft, consider a cylindrical section inside this circular shaft. This section has a length of L and a radius of R, with one end fixed. The radius of the cylindrical section is...
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A Microfluidic Technique to Probe Cell Deformability
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Jamming of Deformable Polygons.

Arman Boromand1,2, Alexandra Signoriello3, Fangfu Ye1,4

  • 1Beijing National Laboratory for Condensed Matter Physics and CAS Key Laboratory of Soft Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing, China.

Physical Review Letters
|January 5, 2019
PubMed
Summary
This summary is machine-generated.

We introduce a new deformable particle (DP) model for soft materials. This model explains jamming and transitions in particle packings, offering insights into material behavior.

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Area of Science:

  • Soft matter physics
  • Computational modeling
  • Materials science

Background:

  • Existing models for soft particulate materials have limitations.
  • Understanding jamming and phase transitions in these materials is crucial.

Purpose of the Study:

  • Introduce the deformable particle (DP) model.
  • Investigate jamming and packing fraction in relation to particle asphericity.
  • Explain the solid-to-fluid transition observed in soft matter.

Main Methods:

  • Developed a 2D deformable particle (DP) model.
  • Incorporated a shape-energy function and repulsive interparticle forces.
  • Studied jamming onset as a function of particle asphericity (A).

Main Results:

  • Packing fraction increases with asphericity (A) up to A*=1.16.
  • Deformable particle packings are solidlike both below and above A*.
  • Identified a transition from tension- to compression-dominated regimes at A*.

Conclusions:

  • The DP model effectively simulates soft particulate materials.
  • Particle asphericity is a key factor in jamming and material state.
  • The model provides a framework for understanding solid-to-fluid transitions in soft matter.