Yield Stress Estimation
Yield Stress Estimation - Related Videos
01:25
Yield Criteria for Ductile Materials under Plane Stress
0 Views •
2024
In designing structural elements and machine parts using ductile materials, it is crucial to ensure that these components withstand applied stresses without yielding. Yielding is initially determined through a tensile test, which evaluates the material's response to uniaxial stress. However, tensile stress is insufficient when components face biaxial or plane stress conditions This condition requires advanced criteria to predict failure. The Maximum Shearing Stress Criterion, also known as the...
01:31
ATP Yield
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2019
Cellular respiration produces 30 - 32 ATP per glucose molecule. Although most of the ATP results from oxidative phosphorylation and the electron transport chain (ETC), 4 ATP are gained beforehand (2 from glycolysis and 2 from the citric acid cycle). The ETC is embedded in the inner mitochondrial membrane and is comprised of four main protein complexes and an ATP synthase. NADH and FADH2 pass electrons to these complexes, which pump protons into the intermembrane space. This distribution of...
06:14
Estimating the Yield of Compounds on the TLC Plate via the Blue-LED Illumination Technique
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Cited by 1 •
2022
The present protocol developed a method to estimate the yield of compounds on the TLC plate using the blue-LED illumination technique. The advantages of this approach are that it is safe, effective, inexpensive, and allows the researcher to measure multiple samples simultaneously.
02:22
Reaction Yield
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2020
The theoretical yield of a reaction is the amount of product estimated to form based on the stoichiometry of the balanced chemical equation. The theoretical yield assumes the complete conversion of the limiting reactant into the desired product. The amount of product that is obtained by performing the reaction is called the actual yield, and it may be less than or (very rarely) equal to the theoretical yield. Percent Yield In the case of chemical reactions, the actual yield of the product is...
12:51
Evaluation of Commercial-Off-The-Shelf Wrist Wearables to Estimate Stress on Students
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Cited by 23 •
2018
A protocol to evaluate solutions based on commercial-off-the-shelf (COTS) wrist wearables to estimate stress in students is proposed. The protocol is carried out in two phases, an initial laboratory-based stress induction test, and a monitoring stage taking place in the classroom while the student is performing academic activities.
FAQs
Stress-strain measurements track how deformation develops as applied stress changes, while rheological flow curves relate loading to strain rate or flow behavior. The first route emphasizes the onset of irreversible deformation; the second highlights a marked increase in strain rate. Selecting between them depends on which response best represents the material’s service or processing conditions.
A transition may appear as the first sustained irreversible deformation or as a pronounced increase in strain rate. These indicators describe related but different features of the measured response, so they can produce different estimates. Stating the identification criterion is therefore important when comparing materials, interpreting tests, or selecting a constitutive model for engineering calculations.
Controlled loading conditions make the applied stress and resulting response easier to relate during analysis. They allow engineers to determine whether the observed change reflects the selected transition criterion rather than an unclear testing sequence. Consistent control also improves comparisons among materials and supports more dependable use of the resulting value in design and process decisions.
Engineers first apply a controlled loading sequence, then record either stress-strain behavior or a rheological flow response. They examine the data for the onset of irreversible deformation or a marked increase in strain rate, and report the corresponding stress as the estimate. The result can then be compared with suitable constitutive models for further engineering analysis.
The estimate supports decisions involving pipelines, pumps, coatings, concrete mixes, and drilling fluids. In each case, resistance to deformation affects how the material behaves during transport, placement, or processing. Using the measured value helps engineers assess stability and performance requirements rather than relying only on qualitative descriptions of how a material flows or deforms.
A reliable estimate helps predict whether a material will remain stable or begin sustained flow under operating conditions. That information informs transport and processing choices, including equipment and material comparisons. It also helps engineers evaluate constitutive models, improve process efficiency, and reduce uncertainty when designing systems whose performance depends strongly on resistance to deformation.