Fig.4 Each cylindrical specimen was placed on a testing machine, and a compressive load was applied. After a 2N preload, the specimen was compressed at a speed of 10 mm/min to obtain a force-displacement curve.
Fig.4 Each cylindrical specimen was placed on a testing machine, and a compressive load was applied. After a 2N preload, the specimen was compressed at a speed of 10 mm/min to obtain a force-displacement curve.