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Elastic Modulus: Numerical expression indicating the measure of stiffness in a material. It is defined by the ratio of stress in a unit area of substance to the resulting deformation (strain). This allows the behavior of a material under load (such as bone) to be calculated.

Characterizing Multiscale Mechanical Properties of Brain Tissue Using Atomic Force Microscopy, Impact Indentation, and Rheometry

1Department of Materials Science and Engineering, Massachusetts Institute of Technology, 2Department of Biological Engineering, Massachusetts Institute of Technology, 3Department of Mechanical Engineering, Massachusetts Institute of Technology, 4Department of Neurology, The F.M. Kirby Neurobiology Center, Boston Children’s Hospital, Harvard Medical School

JoVE 54201


 Neuroscience

Measuring Ascending Aortic Stiffness In Vivo in Mice Using Ultrasound

1Department of Biomedical Engineering, Johns Hopkins University, 2Department of Anesthesiology and Critical Care Medicine, Johns Hopkins University, 3Department of Medicine (Cardiology), Johns Hopkins University, 4The Australian School of Advanced Medicine, Macquarie University

JoVE 52200


 Medicine

Environmentally-controlled Microtensile Testing of Mechanically-adaptive Polymer Nanocomposites for ex vivo Characterization

1Advanced Platform Technology Center, Rehabilitation Research and Development, Louis Stokes Cleveland Department of Veterans Affairs Medical Center, 2Department of Biomedical Engineering, Case Western Reserve University, 3Department of Electrical Engineering and Computer Science, Case Western Reserve University

JoVE 50078


 Bioengineering

Stress-Strain Characteristics of Steels

JoVE 10361

Source: Roberto Leon, Department of Civil and Environmental Engineering, Virginia Tech, Blacksburg, VA

The importance of materials to human development is clearly captured by the early classifications of world history into periods such as the Stone Age, Iron Age, and the Bronze Age. The introduction of the Siemens and Bessemer processes to produce steels in the mid-1800s is arguably the single most important development in launching the Industrial Revolution that transformed much of Europe and the USA in the second half of the 19th century from agrarian societies into the urban and mechanized societies of today. Steel, in its almost infinite variations, is all around us, from our kitchen appliances to cars, to lifelines such as electrical transmission networks and water distribution systems. In this experiment we will look at the stress-strain behavior of two types of steel that bound the range usually seen in civil engineering applications - from a very mild, hot rolled steel to a hard, cold rolled one.


 Structural Engineering

Assessing Collagen and Elastin Pressure-dependent Microarchitectures in Live, Human Resistance Arteries by Label-free Fluorescence Microscopy

1Department of Cardiovascular and Renal Research, Institute of Molecular Medicine, University of Southern Denmark, 2Department of Biochemistry and Molecular Biology, University of Southern Denmark, 3Department of Cardiac, Thoracic and Vascular Surgery, Odense University Hospital

JoVE 57451


 Bioengineering

Stress-Strain Characteristics of Aluminum

JoVE 10362

Source: Roberto Leon, Department of Civil and Environmental Engineering, Virginia Tech, Blacksburg, VA

Aluminum is one of the most abundant materials in our lives, as it is omnipresent in everything from soda cans to airplane components. Its widespread use is relatively recent (1900AD), primarily because aluminum does not occur in its free state, but rather in combination with oxygen and other elements, often in the form of Al2O3. Aluminum was originally obtained from bauxite mineral deposits in tropical countries, and its refinement requires very high-energy consumption. The high cost of producing quality aluminum is another reason why it is a very widely recycled material. Aluminum, especially when alloyed with one or more of several common elements, has been increasingly used in architectural, transportation, chemical, and electrical applications. Today, aluminum is surpassed only by steel in its use as a structural material. Aluminum is available, like most other metals, as flat-rolled products, extrusions, forgings, and castings. Aluminum offers superior strength-to-weight ratio, corrosion resistance, ease of fabrication, non-magnetic properties, high thermal and electrical conductivity, as well as ease of alloying.


 Structural Engineering

How to Study Basement Membrane Stiffness as a Biophysical Trigger in Prostate Cancer and Other Age-related Pathologies or Metabolic Diseases

1Departamento de Genética, Facultad de Medicina, Universidad de la República (UDELAR), 2Department of Mechanistic Cell Biology, Max Planck Institute of Molecular Physiology, 3School of Biological, Biomedical & Environmental Sciences, University of Hull

JoVE 54230


 Cancer Research

Stress Distribution During Cold Compression of Rocks and Mineral Aggregates Using Synchrotron-based X-Ray Diffraction

1Mineral Physics Institute, Department of Geoscience, Stony Brook University, 2Geological Engineering, Department of Civil and Environmental Engineering, University of Wisconsin-Madison, 3Rock and Ice Physics Laboratory, Department of Earth Sciences, University College London, 4Department of Chemistry, Stony Brook University

JoVE 57555


 Environment

Planar and Three-Dimensional Printing of Conductive Inks

1Department of Materials Science and Engineering, University of Illinois at Urbana-Champaign, 2Center for Micro- and Nanotechnology, Lawrence Livermore National Laboratory, 3Presently at the Interdisciplinary Center for Wide Band-gap Semiconductors, University Of California Santa Barbara

JoVE 3189


 Bioengineering

A Novel Stretching Platform for Applications in Cell and Tissue Mechanobiology

1Centre for Interdisciplinary NanoPhysics, Department of Physics, University of Ottawa, 2University of Ottawa Heart Institue, University of Ottawa, 3Libin Cardiovascular Institute of Alberta, University of Calgary, 4Department of Biology, University of Ottawa, 5Institute for Science, Society and Policy, University of Ottawa

JoVE 51454


 Bioengineering

Characterization Of Multi-layered Fish Scales (Atractosteus spatula) Using Nanoindentation, X-ray CT, FTIR, and SEM

1Geotechnical and Structures Laboratory, U.S. Army Engineer Research and Development Center, 2Department of Mechanical Engineering, University of Alabama, 3Environmental Laboratory, U.S. Army Engineer Research and Development Center

JoVE 51535


 Bioengineering

Three-dimensional Organotypic Cultures of Vestibular and Auditory Sensory Organs

1Department of Stem Cell Biology and Regenerative Medicine, Keck School of Medicine of the University of Southern California, 2Caruso Department of Otolaryngology-Head and Neck Surgery, Keck School of Medicine of the University of Southern California, 3Howard Hughes Medical Institute and Laboratory of Sensory Neuroscience, The Rockefeller University

JoVE 57527


 Developmental Biology

A Step by Step Protocol for Subretinal Surgery in Rabbits

1Department of Ophthalmology, University of Bonn, 2Department of Ophthalmology, National University of Singapore, 3Geuder AG, 4Department of Ophthalmology, University of Münster, 5Section on Epithelial and Retinal Physiology and Disease, National Eye Institute/National Institutes of Health, 6Surgical Retina Department, Singapore National Eye Centre

JoVE 53927


 Medicine

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