In solid mechanics, quasistatic loading refers to loading where inertial effects are negligible. In other words, time and inertial force are irrelevant.[1]
References
^Yavari, Arash. "quasi static loading | iMechanica". A static load is time independent. A dynamic load is time dependent and for which inertial effects cannot be ignored. A quasi-static load is time dependent but is "slow" enough such that inertial effects can be ignored. Note that a load quasi-static for a given structure (made of some material) may not be quasi-static for another structure (made of a different material). Retrieved 10 April 2011.