Results 71 to 80 of about 143,227 (288)
Rock Breaking Mechanism and Drilling Performance of Harmonic Vibro-Impact Drilling
IOP Conference Series: Earth and Environmental Science, 2020 Abstract An improved model of displacement response of rock considering damping is proposed and the energy response model is further presented. Then, the rock breaking mechanism under harmonic vibro-impact is investigated based on the displacement response and energy response.
Siqi Li +5 more
openaire +1 more source
Additive Manufacturing of Patient‐Specific Intracranial Aneurysm Cell Culture Models
Advanced Materials Technologies, EarlyView.Patient‐specific intracranial aneurysm models were fabricated using chocolate moulding, 3D printed water‐soluble cores, and direct resin 3D printing. Moulding PDMS around sacrificial cores made of chocolate or 3D printed water‐soluble resin yielded accurate, expandable, and endothelializable models that outperformed resin‐based approaches.
Chloe M. de Nys +6 more
wiley +1 more source
Meitan xuebaoChina has a wealth of abundant coalbed methane (CBM) resources at great depths. However, the low permeability of these deep coal seams coupled with the challenges posed by high-stress pressure environments, hampers efficient gas extraction.
Lei ZHOU +4 more
doaj +1 more source
, 2018 The total energy of acoustic emission (AE) events in externally stressed materials diverges when approaching macroscopic failure. Numerical and conceptual models explain this accelerated seismic release (ASR) as the approach to a critical point that ...
Baró, Jordi +7 more
core +1 more source
Laboratory studies of a high-strength roof bolting by means of self-extending mixtures [PDF]
, 2019 Purpose is to analyze parameters of a new method to fasten roof bolts with the help of nonadhesive mixtures extending while hardening along with the development of high expansion pressures. Methods.
Isaienkov, O +3 more
core +1 more source
Collision‐Resilient Winged Drones Enabled by Tensegrity Structures
Advanced Robotics Research, EarlyView.Based on structures of birds such as the woodpeck, this article presents the collision‐resilient aerial robot, SWIFT. SWIFT leverages tensegrity structures in the fuselage and wings which allow it to undergo large deformations in a crash, without sustaining damage. Experiments show that SWIFT can reduce impact forces by 70% over conventional structures.
Omar Aloui +5 more
wiley +1 more source
Grip and Grasp: Lizard Claw Inspired Robotic Manipulators
Advanced Robotics Research, EarlyView.Our study identifies the most effective lizard claw shape for use as an end effector in a bioinspired robotic manipulator. By examining key geometric features and combining them into comparative indices, the Crotaphytus collaris claw is found to be the best fit.
Hyeon Lee +4 more
wiley +1 more source
Plasma-Assisted TBM Cutting Mechanism for Rock Breaking
In the process of tunnel excavation, rocks with great hardness and abrasion are often encountered, which leads to low rock breaking efficiency and serious tool wear. In order to solve this problem, a new TBM cutting mechanism is proposed in this paper. The cutter head is equipped with a plasma torch and a shield cutter.
Wei, Hongxin +3 more
openaire +1 more source
Experimental studies of the resultant contact forces in drillbit-rock interaction [PDF]
, 2014 Peer ...
Ajibose, Olusegun Kolawole +2 more
core +1 more source
Cross‐Scale Hierarchical Targeted Delivery System Based on Small‐Scale Magnetic Robots
Advanced Robotics Research, EarlyView.This article reviews a cross‐scale hierarchical targeted delivery system that integrates magnetic continuum robots and magnetic microrobots. By combining rapid long‐range navigation with precise microscale targeting, the system overcomes key limitations of single‐scale approaches.
Junjian Zhou +4 more
wiley +1 more source