"mechanical principle" is correct and usable in written English.
You can use it when referring to the fundamental concepts and laws governing a particular system or device. For example: "The mechanical principle of torque allowed the car to move more quickly."
They conceived not only the idea of multiplication but also the mechanical principle, the roller, which in more sophisticated form became the printing press.
Whatever the manufacturing process, this rigid system acts biomechanically on the patient through the "three-point bending" mechanical principle.
The analytic potential structures are selected out of a class of generalized uniform electrostatic fields where a special mechanical principle of similarity is obeyed approximately in some region.
Based on strong magnet and reliable mechanical principle, a novel device for modeling dynamic compaction is developed, which can realize continuous tamping in centrifuge to a certain extent.
Its mechanical principle is based on a band brake, which results in a high amplification of the applied force while enabling a variable control force.
He labored to construct a unified account of nature which would be as all-encompassing as the scholastic system derived from Aristotle but based on the un-Aristotelian "mechanical" principle that physical phenomena are to be explained in terms of contact between moving bodies and the motions and shapes of their parts.
Multi-scale mechanical principles imply the same mechanism of damage evolution proceeds the catastrophe.
The first model follows an empirical approach (experimentally-based approach), while the second model takes into account the physical and mechanical principles of the technique (mechanically-based approach).
Introduces the mechanical principles governing fluid flow.
Gao, H. Probing mechanical principles of cell nanomaterial interactions.
Biomechanics is the study of biological systems through mechanical principles.
