Mechanical Testing
Mechanical 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.
11:51
An Improved Mechanical Testing Method to Assess Bone-implant Anchorage
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Cited by 10 •
2014
An improved method to mechanically test bone anchorage to candidate implant surfaces is presented. This method allows for alignment of the disruption force exactly perpendicular, or parallel, to the plane of the implant surface, and provides an accurate means to direct the disruption forces to an exact peri-implant region.
04:46
The Quantification of Injectability by Mechanical Testing
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Cited by 16 •
2020
Presented here is a protocol for quantitatively evaluating the injectability of a material through a syringe-needle system using a standard mechanical testing rig.
07:15
A Testing Platform for Durability Studies of Polymers and Fiber-reinforced Polymer Composites under Concurrent Hygrothermo-mechanical Stimuli
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2014
The durability of polymers and fiber-reinforced polymer composites in service is a critical aspect for their designs and condition-based maintenance. We present a novel low-cost laboratory testing platform for the investigation of the influence of concurrent mechanical and environmental loadings, and may help design more efficient yet safer composite structures.
11:38
Environmentally-controlled Microtensile Testing of Mechanically-adaptive Polymer Nanocomposites for ex vivo Characterization
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Cited by 9 •
2013
A method is discussed by which the in vivo mechanical behavior of stimuli-responsive materials is monitored as a function of time. Samples are tested ex vivo using a microtensile tester with environmental controls to simulate the physiological environment. This work further promotes understanding the in vivo behavior of our material.
FAQs
Stress-strain data connect the applied loading condition with the specimen’s deformation response. From this relationship, researchers can quantify elastic modulus, which indicates stiffness, along with ultimate strength and toughness. Examining these values helps distinguish how candidate materials or biological constructs respond as forces increase and supports comparisons between specimens intended for similar bioengineering applications.
Each loading mode examines a different way a specimen may experience force. Tensile testing evaluates response to pulling, compression examines response to squeezing, bending combines loading across a specimen, and shear assesses sliding forces. Selecting the relevant mode makes the measurements more representative of intended use and helps identify properties important to a particular material, tissue, scaffold, or implant.
Representativeness depends on applying a controlled loading condition that approximates how the biological material or engineered construct will be used. The selected force type and the resulting deformation should correspond to the intended context, whether involving a biomaterial, tissue scaffold, implant, or engineered tissue. This alignment improves the relevance of measured strength, stiffness, and durability.
A typical experiment places a specimen under a controlled tensile, compression, bending, or shear load while instruments record both force and deformation. Those measurements are then used to generate stress-strain data and calculate mechanical properties such as elastic modulus, ultimate strength, and toughness. The resulting profile provides a basis for comparing materials or engineered biological constructs.
Bioengineers use these measurements to characterize biomaterials, tissue scaffolds, implants, and engineered tissues before making design or selection decisions. The data indicate whether a candidate construct has the required strength, stiffness, and durability for its intended role. Testing therefore supports material selection, device design, and quality control rather than relying only on composition or geometry.
Mechanical measurements allow researchers to compare an engineered tissue’s behavior with the mechanical behavior expected of living tissue. Results can reveal whether the construct provides an appropriate combination of strength, stiffness, and durability under relevant loading. This information guides refinement of the construct and supports development of engineered tissues that more closely match biological mechanical performance.