Mechanical Properties Testing
Mechanical Properties Testing - Related Videos
10:32
Mechanical Testing of Mouse Carotid Arteries: from Newborn to Adult
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Cited by 31 •
2012
Passive mechanical testing of mouse carotid arteries is described, with special consideration for adapting to different specimen ages. The procedures include determining the in vivo length of the artery, mounting it in a pressure myograph, recording data, measuring the unloaded dimensions and analyzing the resulting data.
06:59
In Vivo Evaluation of the Mechanical and Viscoelastic Properties of the Rat Tongue
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2017
We describe a surgical procedure in an anesthetized rat model for determining the muscle tone and viscoelastic properties of the tongue. The procedure involves specific stimulation of the hypoglossal nerves and application of passive Lissajous force/deformation curves to the muscle.
11:25
A Millimeter Scale Flexural Testing System for Measuring the Mechanical Properties of Marine Sponge Spicules
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Cited by 4 •
2017
We present a protocol for performing three-point bending tests on sub-millimeter scale fibers using a custom-built mechanical testing device. The device can measure forces ranging from 20 µN up to 10 N and can therefore accommodate a variety of fiber sizes.
11:19
Characterizing Multiscale Mechanical Properties of Brain Tissue Using Atomic Force Microscopy, Impact Indentation, and Rheometry
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Cited by 36 •
2016
We present a set of techniques to characterize the viscoelastic mechanical properties of brain at the micro-, meso-, and macro-scales.
10:24
Quantifying the Mechanical Properties of the Endothelial Glycocalyx with Atomic Force Microscopy
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Cited by 34 •
2013
The mechanical characteristics of endothelial glycocalyx were measured by indentation using micron sized spheres on AFM cantilevers. Endothelial cells were cultured in a custom chamber under physiological flow conditions to induce glycocalyx expression. Data were analyzed using a thin film model to determine the glycocalyx thickness and modulus.
FAQs
A stress-strain relationship connects the applied force response with the material’s deformation. The resulting pattern helps distinguish strength, or resistance to applied loading, from stiffness, or resistance to deformation, and ductility, or the capacity to deform before fracture. Examining these parameters together provides a more complete picture of performance than any single force or displacement value.
Each loading mode probes material response in a different way. Tension and compression apply forces along opposing directions, bending combines loading with deformation across a specimen, and indentation evaluates resistance to localized penetration. Selecting among them allows researchers to examine properties relevant to the material’s expected use while generating force and displacement data for comparison.
Composition, molecular structure, processing history, and environmental conditions can all influence measured mechanical behavior. These factors may alter how a material carries load, deforms, or resists fracture, so identical testing approaches can produce different results for differently prepared or conditioned materials. Comparing results with these variables helps connect microscopic or chemical changes to macroscopic performance.
A typical workflow begins by selecting a loading mode such as tension, compression, bending, or indentation. The instrument then applies a controlled load or deformation while recording force and displacement. Researchers use those measurements to generate stress-strain relationships and calculate related mechanical parameters, which can then be compared across materials, formulations, processing conditions, or environments.
The measurements link chemical and structural variables to observable material performance. Researchers can examine how molecular structure, composition, or processing affects strength, stiffness, ductility, hardness, and fracture resistance. This connection supports the evaluation and development of polymers, composites, ceramics, metals, coatings, and other materials without relying only on their chemical descriptions.
Mechanical results provide performance-based evidence for comparing materials and assessing whether they meet intended requirements. During development, the data can reveal how composition or processing changes alter behavior. In quality control, repeated measurements help evaluate consistency among materials or products. The same information supports decisions about suitability for research, manufacturing, and engineering applications.