The phrase "instantaneous deformation" is correct and usable in written English.
It can be used in contexts related to physics, engineering, or materials science when discussing changes in shape or size that occur in a very short time frame.
Example: "The material exhibited instantaneous deformation upon impact, indicating its lack of resilience."
Alternatives: "immediate deformation" or "rapid deformation."
By excavating the lower stages of the cavern, some instantaneous deformation occurs in displacement time curve of the crown.
Especially the creep and instantaneous deformation behaviors under the changing process of soil property with time are studied.
In this model the creep deformation, the self-deformation in volume and the instantaneous deformation are considered.
The onset of axial wrinkling was previously established by bifurcation analyses that use instantaneous deformation theory moduli.
Those characteristics require the structural analysis to include the dynamic effects over the deformation of the structure, integrating the instantaneous deformation of the structure into the nonlinear dynamic finite element analysis (FEA) computation.
Paleoseismology differs from more general geologic studies of slow to rapid crustal movements during the late Cenozoic (for example, neotectonics) in its focus on the almost instantaneous deformation of landforms and sediments during earthquakes.
Two stages were observed during the whole creep process, i.e., instantaneous elastic deformation and decaying creep deformation.
The instantaneous tensile deformation properties were insensitive to phase segregation while the high-strain tensile deformation behavior was strongly and adversely influenced by phase segregation.
This investigation deals with the optimization of the kinematic parameters of a parallel robot structure, with respect to a given instantaneous twist deformation (ITD) of the moving platform.
The instantaneous volume deformation potential was calculated by applying an isotropic perturbation of ±1% to the equilibrium lattice geometry, scaling both lattice vectors and ionic coordinates.
The lateral forces and aligning torques of the tyre/road interaction are calculated via the instantaneous lateral deformations in the contact patches.
