"rationality of design" is correct and usable in written English.
You can use it when you want to refer to the general principle of designing things with a logical approach. For example, "The rationality of design was evident in the clever and efficient layout of the new shop."
Visualization tests were conducted under different conditions to verify the rationality of the design buffer tank.
The simulation results confirm the rationality of the design procedure and demonstrate that the proposed discriminator performs better than the classical innovation-based maneuver discriminator.
I moved here six years ago because biomedical research had allowed us to think about disease in very mechanistic terms and the rationality of the design of medications to treat diseases.
The obtained result indicates this nature-inspired nanocomposite indeed shows an enhanced gas-sensing property towards the ethanol, testifying the rationality of our design.
The rationality of the design is based on the utilization of mucoadhesive polymers (carbomer and carboxymethylcellulose), a plasticizer (polyethyleneglycol 400, PEG400) and a surfactant (ascorbyl palmitate, ASC16).
Such things as the frozen shaft thickness and the excavated section height should be chosen to assure the rationality of the design and to avoid potential faults and accidents.
Through 55 examples of PSCWJs, the rationality of the design theory proposed in this study is verified, and a reasonable value range of the middle bolt interval on the flange cover plate is determined.
Finally, six ABRB FE models are presented to verify the rationality of the design method being safe and reliable to predict the ABRB's overall buckling failure and bending failure in the ECSR of BRBs.
The study obtained the optical efficiency model on the whole day of the static incorporated compound parabolic concentrator and verified the rationality of the design which provided the guarantee for the further research on the building integrated with concentrating photovoltaic/thermal (BICPV/T) system.
Then we conduct the experiments using a nanometer actuator to drive the wafer alignment mark meanwhile keeping the mask alignment mark motionless, which validates the feasibility and rationality of our designed scheme.
