Cyclic Loading
Cyclic Loading - Related Videos
08:37
Cyclic Voltammetry (CV)
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2023
Source: Laboratory of Dr. Kayla Green — Texas Christian University A Cyclic Voltammetry (CV) experiment involves the scan of a range of potential voltages while measuring current. In the CV experiment, the potential of an immersed, stationary electrode is scanned from a predetermined starting potential to a final value (called the switching potential) and then the reverse scan is obtained. This gives a 'cyclic' sweep of potentials and the current vs. potential curve derived from the data is...
11:36
Ex vivo Mechanical Loading of Tendon
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2007
A new in vitro system for simultaneously loading four tendons in culture is described.
10:12
Protein Misfolding Cyclic Amplification of Prions
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Cited by 7 •
2012
Protein misfolding cyclic amplification (PMCA) is an in vitro assay for the study of prion conversion and strain and species barriers. It can also be used as a prion detection assay.
05:04
A Non-Invasive Method for Generating the Cyclic Loading-Induced Intra-Articular Cartilage Lesion Model of the Rat Knee
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Cited by 3 •
2021
Here, we present the cyclic loading-induced intra-articular cartilage lesion model of the rat knee, generated by 60 cyclic compressions over 20 N, resulting in damage to the femoral condylar cartilage in rats.
07:52
Removal of Branched and Cyclic Compounds by Urea Adduction for Uk'37 Paleothermometry
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2023
Source: Laboratory of Jeff Salacup - University of Massachusetts Amherst As mentioned in previous videos, the product of an organic solvent extraction, a total lipid extract (TLE), is often a complex mixture of hundreds, if not thousands, of different compounds. The researcher is often only interested in a handful of compounds. In the case of our two organic paleothermometers (Uk'37 and MBT/CBT), the interest is in only 6 compounds (2 alkenones and 4 isoprenoidal glycerol dialkyl glycerol...
FAQs
A component can fail under cyclic loading even when no single cycle reaches its static strength because repeated stress acts on microscopic defects. With continued variation, those defects may initiate cracks, and the cracks can grow through fatigue. This explains why a static strength check alone may not capture damage accumulated during service.
Both the size and direction of a changing load influence the response. Repeated variation in magnitude can drive crack initiation and growth, while changes in direction alter how the material or structure experiences stress and strain. Accounting for these variations makes fatigue evaluation more representative of actual service conditions.
These responses indicate that repeated deformation is changing the material or structure. Hysteresis reflects repeated deformation behavior, stiffness loss signals a reduced structural response, and accumulated plastic strain shows that permanent deformation is building over cycles. Tracking these effects helps engineers recognize damage mechanisms and assess whether performance is degrading before final failure.
Engineers apply repeated or fluctuating forces, stresses, or strains to evaluate components under realistic service conditions. The resulting behavior supports fatigue analysis, which helps predict service life and identify failure risks. Findings from these assessments can guide safer, more durable designs instead of relying only on static-strength calculations.
Cyclic loading assessments apply to structures and components exposed to repeated service demands, including bridges, aircraft structures, machine parts, and wind turbines. Testing and fatigue analysis help reveal how these systems may respond over time, allowing engineers to examine durability, identify potential failure risks, and support decisions about safer structural design.
The analysis connects repeated service demands with damage mechanisms such as crack growth, stiffness loss, and accumulated plastic strain. Engineers can use the resulting assessment to predict service life, identify vulnerable components, and modify designs toward greater durability. This approach is especially important when realistic operating conditions differ from a single static load.