Results 11 to 20 of about 33,310 (219)

Force calculation model of TBM disc cutter based on rock breaking mode

Meitan xuebao, 2023
The rock breaking force of the disc cutter is the core parameter for studying the efficiency and safety of TBM excavation in hard rock tunnels, the key to improve the accuracy of the calculation model is how to match the calculation model with the rock ...
Jiulei CAO, Jin YU, Zhuqing ZHANG, Xuewei FENG, Fangqiang CHANG, Yanyan CAI   +5 more
doaj   +1 more source

Mechanical and Acoustic Emission Responses of Rock Fragmentation under Disc Cutter Penetration

Advances in Civil Engineering, 2021
To better understand the rock fragmentation mechanism and optimize cutter design and selection for rock excavation by TBM, a set of three-dimensional indentation tests was conducted with different rock and cutter types.
Qi Liu, Yucong Pan, Penghai Deng
doaj   +1 more source

Mesoscale Equivalent Numerical Study of Ultra-High Performance Concrete Subjected to Projectile Impact

Applied Sciences, 2023
Numerical investigations on the performance of ultra-high performance concrete (UHPC) subjected to projectile impacts have attracted extensive attention, but there are still deficiencies in the accuracy and computational efficiency of related simulation ...
Jian Yang, Jie Ao, Wenzheng Wan, Yikang Liu   +3 more
doaj   +1 more source

Effect of Bit Configuration in Impact Penetration Tests with Button Bits

Journal of MMIJ, 2016
Computer simulation of percussive rock drilling requires appropriate numerical models for the interactions among the drill body, rod, rod joint, bit, and rock.
Yingzong LIANG, Kimihiro HASHIBA, Katsunori FUKUI, Masahiro KOIZUMI, Toshio MATSUDA   +4 more
doaj   +1 more source

Modeling of light dynamic cone penetration test – Panda 3 ® in granular material by using 3D Discrete element method

EPJ Web of Conferences, 2017
The recent technological developments made on the light dynamic penetration test Panda 3 ® provide a dynamic load–penetration curve σp – sp for each impact.
Tran Quoc Anh, Chevalier Bastien, Benz Miguel, Breul Pierre, Gourvès Roland   +4 more
doaj   +1 more source

Study on the Composite Structure of Aluminum Foam-Filled Thin-Walled Metal Tube to Reduce the Charge Overload inside the Projectile during the Penetration Process

Shock and Vibration, 2020
When a projectile penetrates a target at high speed, the charge loaded inside the projectile usually bears a high overload, which will consequently severely affect its performance.
Fudi Liang, Zengyou Liang, Dezhi Deng
doaj   +1 more source

Nano-Indentation to Determine Mechanical Properties of Intraocular Lenses: Evaluating Penetration Depth, Material Stiffness, and Elastic Moduli

Ophthalmology and Therapy, 2023
Introduction Intraocular lenses (IOL) should remain in the eye for life after implantation into the capsular bag during cataract surgery. The material must meet various requirements.
Andreas F. Borkenstein, Eva-Maria Borkenstein, Inge Mühlbacher, Michaela Flock   +3 more
doaj   +1 more source

Analytical solution for penetration response of steel catenary riser at touchdown zone on bilinear seabed

Yantu gongcheng xuebao, 2018
The pipe-soil interaction at touchdown zone (TDZ) of steel catenary riser (SCR) has important influences on the penetration depth and fatigue life of pipelines.
WANG Teng , DU Bao-ping
doaj   +1 more source

Study on the Comparison of Zero Shear Viscosity and Capillary Viscosity of Road Asphalt

Chemical Engineering Transactions, 2017
The penetration and the penetration index, softening point of 60 °C and equivalent softening point, dynamic viscosity, dynamic shear rheological test, zero shear viscosity and multiple stress creep recovery modified asphalt high temperature ...
Mingxia Tao, Renan Ma
doaj   +1 more source

A study on plant root apex morphology as a model for soft robots moving in soil. [PDF]

PLoS ONE, 2018
Plants use many strategies to move efficiently in soil, such as growth from the tip, tropic movements, and morphological changes. In this paper, we propose a method to translate morphological features of Zea mays roots into a new design of soft robots ...
Anand Kumar Mishra, Francesca Tramacere, Roberto Guarino, Nicola Maria Pugno, Barbara Mazzolai   +4 more
doaj   +1 more source