instantaneous strain

instantaneous strain

[¦in·stən¦tā·nē·əs ′strān]
(mechanics)
The immediate deformation of a solid upon initial application of a stress, in contrast to creep strain.
References in periodicals archive ?
Instantaneous strain gradually increases with temperature and elastic modulus decreases with temperature.
In terms of creep strain level, instantaneous strain of Three Gorges granite is about 0.
For example, if we increase the stress from 1000 to 2000 psi, the instantaneous strain increases by 0.
0] is the instantaneous strain, a and b are material constants, and the other variables are as for Eq.
The instantaneous strain values of each group of composites at different temperatures are listed in Table 1.
Under normal condition of loading, the instantaneous strain at the application of load includes not only the elastic strain but also some creep.
If an elastomer part is subjected to instantaneous strain (at time t = O) and held constant for a long time (as in the case of many press-fit bushings), the corresponding stress in the stress-time graph decreases with time from its instantaneous value, until it reaches some non-zero value.
k] stems from the mechanical issues inherent in a rheometer's imposition of an instantaneous strain.
It is convenient to include instantaneous strain in the relation since the instantaneous strain due to application of load and the subsequent creep could not easily be separated from one another.
The instantaneous strain is followed by the primary creep stage, where the creep rate is decreasing, followed by an almost stable creep rate, while at high stresses (close to the yield stress) an abrupt change of the slope takes place, related to creep failure.
8, which compares the instantaneous strain to the strain after the 8-h creep period for the tests shown in Fig.