Strain Rate Loading
Strain Rate Loading - Related Videos
01:20
Normal Strain under Axial Loading
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2024
Normal strain under axial loading is an important concept in the field of mechanics of materials. Axial loading implies the application of a force along the axis of a material, like a column or bar. This force can either compress or stretch the material. In the context of axial loading, normal strain is the deformation experienced by the material in the direction of the loading force. It's calculated as the change in length divided by the original length of the material. This unitless ratio...
12:21
Measurement of mRNA Decay Rates in Saccharomyces cerevisiae Using rpb1-1 Strains
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Cited by 11 •
2014
The steady state level of specific mRNAs is determined by the rate of synthesis and decay of the mRNA. Genome-wide mRNA degradation rates or the decay rates of specific mRNAs can be measured by determining mRNA half-lives. This protocol focuses on measurement of mRNA decay rates in Saccharomyces cerevisiae.
11:28
A Coupled Experiment-finite Element Modeling Methodology for Assessing High Strain Rate Mechanical Response of Soft Biomaterials
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Cited by 8 •
2015
The current study prescribes a coupled experiment-finite element simulation methodology to obtain the uniaxial dynamic mechanical response of soft biomaterials (brain, liver, tendon, fat, etc.). The multiaxial experimental results that arose because of specimen bulging obtained from Split-Hopkinson Pressure Bar testing were rendered to a uniaxial true stress-strain behavior when simulated through iterative optimization of the finite element analysis of the biomaterial.
02:58
Measurement of Compressive Stress-Strain Response at Small-Strains
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2025
This protocol presents the configuration of a compression test device capable of precisely measuring the mechanical properties of microstructures in the small-strain region, along with a systematic method for compression testing using this device. The proposed device can be used to analyze various microstructures and the mechanical behavior of polymer-based materials.
07:59
Intermediate Strain Rate Material Characterization with Digital Image Correlation
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Cited by 1 •
2019
Here we present a methodology for the dynamic characterization of tensile specimens at intermediate strain rates using a high-speed servo-hydraulic load frame. Procedures for strain gauge instrumentation and analysis, as well as for digital image correlation strain measurements on the specimens, are also defined.
FAQs
At rapid deformation rates, stress waves can travel through the material while inertia influences how different regions respond to force. These effects may change the measured stress-strain behavior compared with slow loading. Accounting for both is important when interpreting results from high-speed conditions, because the response may reflect dynamic effects as well as the material’s deformation itself.
The material’s stress-strain response can change because rapid deformation leaves less time for time-dependent effects to develop. Consequently, strength, ductility, fracture behavior, and energy absorption may differ from values observed during slow loading. Comparing results across rates helps reveal which properties remain reliable for impact, blast, machining, or high-speed manufacturing conditions.
The deformation rate establishes the time scale over which force and strain develop. If that rate is not controlled or measured, differences in stress-strain behavior may be difficult to attribute to the material rather than to the test conditions. Rate information therefore provides essential context for comparing experiments and evaluating responses under rapid loading.
A basic experiment applies deformation at a specified rate, controls that rate during the test, and measures the resulting material response. The recorded deformation and force-related behavior can then be used to examine stress-strain characteristics, strength, ductility, fracture, or energy absorption. Maintaining known conditions makes comparisons between loading scenarios more meaningful.
Researchers choose rapid-rate testing when the intended application includes impact, blast, machining, or high-speed manufacturing. Slow tests may not represent the stress waves, inertia, or time-dependent effects present in those situations. Rate-controlled measurements provide data that better support material selection and the design of structures, protective systems, and engineered components exposed to fast deformation.
In physics, these experiments connect externally applied deformation with the material’s dynamic stress-strain response. Measurements of strength, ductility, fracture, and energy absorption help show how a material may behave under demanding conditions. Engineers can use that evidence to compare candidate materials and develop safer structures, protective systems, and components for high-speed or impact-related environments.