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Related Concept Videos

Bending of Members Made of Several Materials01:11

Bending of Members Made of Several Materials

760
In analyzing a structural member composed of two different materials with identical cross-sectional areas, it is crucial to understand how their distinct elastic properties affect the member's response under load. The analysis involves assessing stress and strain distributions using the transformed section concept, which accounts for variations in material properties.
Hooke's Law determines stress in each material, stating that stress is proportional to strain but varies due to each material's...
760
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

824
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.
824
Eccentric Axial Loading in a Plane of Symmetry01:16

Eccentric Axial Loading in a Plane of Symmetry

763
Eccentric axial loading occurs when an axial load is applied away from the centroidal axis of a structural member. This scenario is common in engineering, where structural elements may not be directly aligned due to various design or functional requirements.
763
Stresses under Combined Loadings01:23

Stresses under Combined Loadings

604
When analyzing a bent tube with a circular cross-section subjected to multiple forces, it is crucial to determine the stress distribution in order to maintain structural integrity under varied load conditions.
The process begins by slicing the tube at critical points and analyzing the internal forces and stress components at these sections, focusing on the centroid. Normal stresses, generated by axial forces and bending moments, are either compressive or tensile and vary across the section from...
604
Flexural Stress01:16

Flexural Stress

906
When analyzing bending in symmetric members, it's crucial to understand how stresses distribute when subjected to bending moments. This stress distribution is effectively described by applying fundamental mechanics and material science principles, particularly Hooke's Law for elastic materials.
Hooke's Law states that within the material's elastic limits, stress is directly proportional to strain. In a member experiencing a bending moment, the strain at any point is relative to its distance...
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Stress: General Loading Conditions01:15

Stress: General Loading Conditions

743
To grasp the intricacy of real-world conditions where multiple loads are applied simultaneously to a structure, one might visualize a section passing through a specific point within a body, aligned parallel to the xy plane. This section is subjected to various forces, including original loads, normal forces, and shearing forces.
The shearing force, possessing potential directionality within the plane of the section, is simplified into two component forces running parallel to the x and y axes....
743

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Related Experiment Video

Updated: May 4, 2026

Creating a Structurally Realistic Finite Element Geometric Model of a Cardiomyocyte to Study the Role of Cellular Architecture in Cardiomyocyte Systems Biology
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Structural finite element analysis to explain cell mechanics variability.

Sara Barreto1, Cecile M Perrault1, Damien Lacroix1

  • 1INSIGNEO Institute for In Silico Medicine, Department of Mechanical Engineering, University of Sheffield, Mappin Street, Sheffield S1 3JD, United Kingdom.

Journal of the Mechanical Behavior of Biomedical Materials
|January 7, 2014
PubMed
Summary
This summary is machine-generated.

This study models cell mechanics, revealing that actin cortex thickness and cytoplasm rigidity significantly impact cell force under compression and shear. Prestress primarily influences shear response, aiding tissue engineering research.

Keywords:
Actin cortexCell modelCytoskeletonFinite element analysisMaterial propertiesPhenotype

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Area of Science:

  • Biomedical Engineering
  • Cellular Mechanics
  • Tissue Engineering

Background:

  • Modeling cellular mechanical responses is crucial for understanding tissue engineering and disease.
  • Previous finite element models provide a basis for investigating cell behavior under mechanical stress.

Purpose of the Study:

  • To investigate how variations in intracellular component material properties affect cell mechanical responses to compression and shearing.
  • To identify key mechanical features influencing different cell types, focusing on cytoskeleton components and prestress.

Main Methods:

  • Utilized a validated finite element cell model.
  • Performed a parametric study to analyze the impact of varying material properties (e.g., actin cortex thickness, Young's modulus, cytoplasm rigidity) and prestress.
  • Conducted sensitivity analysis to determine the influence of these parameters on cell force.

Main Results:

  • The actin cortex does not significantly resist shearing loads.
  • Cell force under compression and shearing is highly sensitive to actin cortex thickness, Young's modulus, and cytoplasm rigidity.
  • Prestress variation primarily affects cell response to shear loads.

Conclusions:

  • The developed model establishes a relationship between cell force and prestress under specific loading conditions, aligning with experimental data.
  • Findings provide guidelines for relating mechanical properties to cell phenotype and inform future models of cell structure-function relationships.