In cold regions, the dynamic compressive strength (DCS) of rock damaged by freeze-thaw
weathering significantly influences the stability of rock engineering. Nevertheless, testing the …

Underactuated robotic systems have become an important research topic aiming at
significant improvement of the behavioural performance and energy efficiency. Adopting …

This paper aims to study the fracture characteristics of blunt indenter impacting formation
under static and harmonic dynamic loads by carrying out a series of FE numerical …

High-efficiency rock-breaking is a problem that has long been studied in the oil-and gas-
drilling industry. The successful use of ultrasonic technology in related fields has prompted …

This paper studies the electromagnetic field used for driving a vibro-impact capsule
prototype for small bowel endoscopy. Mathematical models of the electromagnetic field and …

This paper reports the experimental study of a vibro-impact self-propulsion technique
applying for small-bowel endoscopy by using a mesoscale capsule prototype, which is 56.9 …

To achieve high-efficiency drilling in hard formations, the rotary percussive drilling tool was
designed to improve rock-breaking efficiency. Currently, few studies are conducted to …

This study investigates the dynamic behaviour and vibration transmission of impact
oscillators with nonlinear motion constraints. The proposed nonlinear motion constraint with …

This paper demonstrates a theoretical and experimental study on a universal vibro-impact
system with bidirectional drift. With a dedicated experimental rig that is able to verify …

Improving the rock-breaking efficiency of hard rock formation has always been of concern in
drilling. Compound impact drilling technology is a new method to achieve efficient crushing …