Jove
Visualize
Contact Us
JoVE
x logofacebook logolinkedin logoyoutube logo
ABOUT JoVE
OverviewLeadershipBlogJoVE Help Center
AUTHORS
Publishing ProcessEditorial BoardScope & PoliciesPeer ReviewFAQSubmit
LIBRARIANS
TestimonialsSubscriptionsAccessResourcesLibrary Advisory BoardFAQ
RESEARCH
JoVE JournalMethods CollectionsJoVE Encyclopedia of ExperimentsArchive
EDUCATION
JoVE CoreJoVE BusinessJoVE Science EducationJoVE Lab ManualFaculty Resource CenterFaculty Site
Terms & Conditions of Use
Privacy Policy
Policies

Related Concept Videos

Stress Concentrations01:24

Stress Concentrations

834
Stress concentration is when stress intensifies near discontinuities such as holes or abrupt cross-sectional changes in a structural member. This localized stress can often surpass the average stress within the member. The stress distribution in flat bars, either with a circular hole or varying widths connected by fillets, can be determined experimentally using a photoelastic method. The results are based on ratios of geometric parameters like the ratio of the hole's radius to the smaller...
834
Stress Concentrations01:13

Stress Concentrations

813
The concept of stress concentration is crucial for understanding how materials respond under bending stresses, particularly when there are irregularities or discontinuities in the material's geometry. Normally, stress in a symmetric member subjected to pure bending is assumed to be uniformly distributed across the entire cross-section. However, this assumption does not hold when there are variations in the cross-sectional geometry or the presence of notches and holes.
The stress...
813
Stress01:20

Stress

6.0K
When a force is applied on a body, it undergoes deformation. In order to restore the body to its original shape and/or size, an opposite or restoring force is generated within the body. This restoring force is equal to the magnitude of the applied force, but acts in the opposite direction. The amount of this restoring force developed per unit area of the body is called stress. Stress is a tensor quantity and has the SI unit pascal. Stress can be separated into four broad categories depending...
6.0K
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
Transformation of Plane Stress01:18

Transformation of Plane Stress

912
Studying stress transformation is essential in understanding how stress components within a material, like a cube under plane stress, change with rotation. This change is analyzed by considering a prismatic element within the cube. As the element rotates, the stress components acting on it—both normal and shearing stresses—change in magnitude and orientation. This change is quantified using trigonometric functions of the rotation angle, relating the forces acting on the rotated element's...
912
Components of Stress01:23

Components of Stress

674
Stress analysis under multiple loading conditions is intricate, necessitating a comprehensive grasp of normal and shearing stresses. Consider a small cube at point O, subjected to stress on all six faces, visible or not. Normal stress components σx, σy, σz act perpendicularly to the x, y, and z axes. Shearing stress components τxy and τxz are exerted on faces perpendicular to these axes.
Interestingly, the hidden cube faces also experience these stresses, equal and...
674

You might also read

Related Articles

Articles linked to this work by shared authors, journal, and citation graph.

Sort by
Same author

Overcoming van der Waals Bundling: Molecular Wedges Enable Sonication-Free Dispersion of Single-Walled Carbon Nanotubes.

ACS nano·2026
Same author

A Layer-Based Model for Frictional Sliding of Pillar Arrays.

Langmuir : the ACS journal of surfaces and colloids·2026
Same author

Viscoelastic properties of tumor spheroids revealed by a microfluidic compression device and a modified power law model.

Soft matter·2026
Same author

Effects of Short-Term Intensive Insulin Therapy Combined With Oral Hypoglycemic Agents for Inducing Remission in Newly Diagnosed Type 2 Diabetes Mellitus: A Randomized Clinical Trial.

Journal of diabetes·2026
Same author

A microfluidic rheometer for tumor mechanics and invasion studies.

bioRxiv : the preprint server for biology·2025
Same author

A microfluidic rheometer for tumor mechanics and invasion studies.

Lab on a chip·2025

Related Experiment Video

Updated: May 1, 2026

Characterization of Surface Modifications by White Light Interferometry: Applications in Ion Sputtering, Laser Ablation, and Tribology Experiments
11:47

Characterization of Surface Modifications by White Light Interferometry: Applications in Ion Sputtering, Laser Ablation, and Tribology Experiments

Published on: February 27, 2013

15.1K

Flattening of a patterned compliant solid by surface stress.

Dadhichi Paretkar1, Xuejuan Xu, Chung-Yuen Hui

  • 1Department of Chemical Engineering, Lehigh University, Bethlehem, PA 18015, USA. anj6@lehigh.edu.

Soft Matter
|April 17, 2014
PubMed
Summary

Gelatin organogels deform significantly due to surface stress, with larger shape changes observed in gels with lower elastic moduli. This study quantifies this deformation and estimates the organogel surface stress.

More Related Videos

Stretching Micropatterned Cells on a PDMS Membrane
09:41

Stretching Micropatterned Cells on a PDMS Membrane

Published on: January 22, 2014

15.1K
Applying Permanent, Robust Stenciled Patterns of Fine Particles to Elastomeric Surfaces
07:12

Applying Permanent, Robust Stenciled Patterns of Fine Particles to Elastomeric Surfaces

Published on: July 8, 2025

605

Related Experiment Videos

Last Updated: May 1, 2026

Characterization of Surface Modifications by White Light Interferometry: Applications in Ion Sputtering, Laser Ablation, and Tribology Experiments
11:47

Characterization of Surface Modifications by White Light Interferometry: Applications in Ion Sputtering, Laser Ablation, and Tribology Experiments

Published on: February 27, 2013

15.1K
Stretching Micropatterned Cells on a PDMS Membrane
09:41

Stretching Micropatterned Cells on a PDMS Membrane

Published on: January 22, 2014

15.1K
Applying Permanent, Robust Stenciled Patterns of Fine Particles to Elastomeric Surfaces
07:12

Applying Permanent, Robust Stenciled Patterns of Fine Particles to Elastomeric Surfaces

Published on: July 8, 2025

605

Area of Science:

  • Materials Science
  • Soft Matter Physics
  • Surface Science

Background:

  • Periodic surface structures are utilized in various applications.
  • Understanding the mechanical behavior of soft materials like organogels is crucial.
  • Surface stress can induce significant shape changes in materials.

Purpose of the Study:

  • To measure and analyze the shape change of periodic ridge profiles in gelatin organogels.
  • To investigate the relationship between elastic modulus and deformation.
  • To estimate the solid-vapor surface stress of the organogels.

Main Methods:

  • Molding gelatin organogels onto poly-dimethylsiloxane (PDMS) masters with defined periodic ridge structures.
  • Measuring the elastic modulus of the organogels.
  • Analyzing shape changes using profilometry and finite element analysis (FEA) for large strains.

Main Results:

  • Gelatin organogel replicas exhibited significant shape deformation compared to their PDMS masters.
  • Larger deformations were systematically observed in organogels with lower elastic moduli.
  • An estimated surface stress of 107 ± 7 mN m⁻¹ was determined for the organogels.
  • Shape changes were consistent with small strain linear elastic theory for shallower ridges.

Conclusions:

  • Solid-vapor surface stress is a significant driver of shape change in gelatin organogels.
  • The elastic modulus plays a critical role in determining the extent of deformation.
  • The findings provide valuable insights into the mechanical properties and surface behavior of organogels.