Creep Compliance
Creep Compliance - Related Videos
01:22
Creep in Concrete
0 Views •
2024
Creep refers to the time-dependent increase in strain under a sustained load, excluding other time-dependent deformations associated with shrinkage, swelling, and thermal expansion in concrete. The primary mechanism behind creep involves the loss of physically adsorbed water from the calcium silicate hydrate within the hydrated cement paste. This process is further exacerbated by concrete's non-linear stress-strain relationship, microcrack development in the interfacial transition zone, and...
01:28
Factors Affecting Creep
0 Views •
2024
In normal-weight aggregate concrete, the hardened cement paste is the primary contributor to creep, whereas the aggregates, being stiffer than the cement paste, are more resilient to stress-induced deformation. The stiffness of the aggregates is defined by their modulus of elasticity, and the more voluminous they are in the concrete, the less it will creep. Further, the water/cement ratio is critical, as a lower ratio increases concrete strength, thus reducing creep. The strength of the...
01:25
Effects of Creep
0 Views •
2024
Creep in concrete, the gradual deformation under prolonged stress, significantly impacts the integrity of structures. For reinforced concrete beams, it can be a vital design consideration, as it increases deflection, sometimes necessitating additional design measures. In columns, especially slender ones under eccentric loads, creep can cause buckling, compromising their stability. However, creep can be beneficial in indeterminate structures by mitigating stresses that arise from shrinkage,...
09:51
Measuring Plant Cell Wall Extension (Creep) Induced by Acidic pH and by Alpha-Expansin
0 Views •
Cited by 43 •
2009
We demonstrate the use of a constant-force extensometer to measure long-term extension (creep) of plant cell wall specimens induced by acidic buffers and expansin protein.
03:08
Characterization of the Mechanical Properties of Mouse Brain Tissue Using Atomic Force Microscopy
0 Views •
2025
Source: Canovic, E. P., et al. Characterizing Multiscale Mechanical Properties of Brain Tissue Using Atomic Force Microscopy, Impact Indentation, and Rheometry. J. Vis. Exp. (2016)This video demonstrates the use of atomic force microscopy (AFM) to measure the viscoelastic properties of brain tissue, where a cantilever with a spherical probe interacts with the tissue and bends under applied forces. A laser beam deflected onto a detector tracks the cantilever to measure indentation depth and...
FAQs
The elastic and viscous components redistribute stress during sustained loading, so deformation does not remain fixed after the initial application of stress. Elastic behavior contributes to the tissue’s immediate mechanical response, while viscous behavior supports continued strain development over time. This combined response allows creep compliance to describe how neural tissue changes mechanically throughout the loading period.
The strain-time response shows whether deformation continues to increase under an unchanged load and how rapidly that change occurs. Researchers quantify deformation relative to the applied stress, allowing them to examine the tissue’s time-dependent mechanical behavior rather than relying on a single deformation value. This temporal information is essential for comparing how brain tissue responds during sustained mechanical conditions.
Creep compliance provides a common descriptor for comparing the deformation response of different tissue samples under sustained stress. Differences in the measured strain relative to the applied load indicate differences in their elastic and viscous behavior. Such comparisons help researchers characterize tissue properties and determine whether biomechanical models represent the mechanical response of nervous tissue appropriately.
A changing creep response indicates that the tissue’s deformation evolves while the applied stress remains constant. Continued strain reflects the redistribution of stress between elastic and viscous components, revealing that the mechanical state depends on loading duration. This observation is important because models of brain deformation must account for behavior that changes over time, not only the initial response.
A measurement begins by subjecting the tissue to a sustained mechanical load, maintaining the stress while tracking deformation over time. Researchers then relate the recorded strain to the applied load to quantify the response. The resulting time-dependent measurement can be used to compare tissue properties and provide data for biomechanical descriptions of nervous tissue.
In neuroscience, creep compliance supplies mechanical information for investigating brain deformation and the role of tissue behavior in neural injury. Researchers can use measured responses to compare tissue properties, develop biomechanical models, and evaluate whether experimental or computational systems represent nervous tissue realistically. Its value comes from connecting sustained mechanical loading with measurable changes in neural-tissue deformation.