Results 41 to 50 of about 249,833 (291)

Study on the Charge Structure Optimization for Coal–Rock Mixed Blasting and Separate Mining in Open-Pit Mine with High Benches

Applied Sciences
This study systematically analyzes the influence of the charge length-to-diameter ratio and stemming length on the radius and volume of blasting craters in coal and rock blasting crater tests to effectively address the challenge of achieving coal–rock ...
Anjun Jiang, Honglu Fei, Yu Yan, Yanyu Liu, Shijie Bao, Jian Guo   +5 more
doaj   +1 more source

Analysis of fracture mechanism for surrounding rock hole based on water-filled blasting

International Journal of Coal Science & Technology, 2020
The principles of fracture development during underwater blasting are examined based on explosion and impact dynamics, fluid dynamics, fracture dynamics, and field testing.
Jia-ling Wang, Jingxuan Yang, Fengfeng Wu, T. Hu, Shams Al Faisal   +4 more
semanticscholar   +1 more source

Multimodal Mechanical Testing of Additively Manufactured Ti6Al4V Lattice Structures: Compression, Bending, and Fatigue

Advanced Engineering Materials, EarlyView.
In this experimental study, the mechanical properties of additively manufactured Ti‐6Al‐4V lattice structures of different geometries are characterized using compression, four point bending and fatigue testing. While TPMS designs show superior fatigue resistance, SplitP and Honeycomb lattice structures combine high stiffness and strength. The resulting
Klaus Burkart, Jonas Schmidt, Anastasiya Toenjes, Johanna Eisenträger   +3 more
wiley   +1 more source

Predictive model of back-wall overpressure behind a cantilever wall

AIP Advances, 2023
To reduce the hazards posed by blast shock waves, important potential targets are usually shielded by cantilever walls. The main factor that indicates whether there is damage is the back-wall overpressure, and of concern here is predicting the back-wall ...
Quanmin Xie, Xinzhe Nian, Hui Zhou, Jianyuan Wu   +3 more
doaj   +1 more source

Al–Cu Composite Casting of Laser‐Deoxidized Copper: Bonding, Interfacial Chemistry, and Thermal Conductivity

Advanced Engineering Materials, EarlyView.
This study investigates laser‐based oxide removal of Cu inserts in oxygen‐free conditions and examines long‐term oxidation kinetics and surface chemistry under different atmospheres via X‐ray photoelectron spectroscopy. Al–Cu compound casting with differently oxidized surfaces is performed, and intermetallic phase formation, morphology, and thermal ...
Timon Steinhoff, Finn‐Lennard Janthur, Sascha Zimmermann, Sarah Seffer, Jörg Hermsdorf, René Gustus, Ludger Overmeyer, Wolfgang Maus‐Friedrichs, Hans Jürgen Maier, Christian Klose   +9 more
wiley   +1 more source

Resistance Rapid Heating of Aluminum Coatings in an Extreme High Vacuum–Adequate Atmosphere for Hot Stamping

Advanced Engineering Materials, EarlyView.
The subject of this work is the development of a corrosion‐protective coating on steel sheets for form hardening. Rapid heating in an extreme high vacuum (XHV)‐adequate atmosphere is a useful method to prevent oxidation during alloying of 22MnB5 and aluminum to obtain a metallurgical bonding.
Lorenz Albracht, Alexander Schnettger, Ulrich Holländer, Sven Hübner, Bernd‐Arno Behrens, Hans Jürgen Maier   +5 more
wiley   +1 more source

Numerical Integration Study of Penetration and Blasting Damage for Composite Underground Protective Structure with Reinforcement Layers

Buildings
In response to the increasing threat of powerful earth-penetrating weapons, underground protective structures typically employ composite structural systems with reinforced steel layers.
Xingji Zhu, Can Zhao, Longjun Xu, Yujin Wang, Shibin Lin, Guochen Zhao   +5 more
doaj   +1 more source

Pyramidal Structures on Yttria‐Stabilized Zirconia after High Temperature Exposure at 1500°C: New Features on an Old Material

Advanced Engineering Materials, EarlyView.
New features on yttria‐stabilized zirconia after exposure at 1500°C: Newly discovered pyramidal structures on an old material. After exposure at 1550°C on the cross section of YSZ new features, namely pyramidal structures are discovered. These structures grow with time, increase in numbers, appear as singularities, are often arranged in strings, and ...
Doris Sebold, Dylan Jennings, Robert Vaßen   +2 more
wiley   +1 more source

Pioneering Insights into the Reaction Kinetics of Metastable Intermolecular Composites Based on Metal Fluorides: Virtually non‐existent condensed Phase Combustion Products and Ultra‐Efficient Reactivity

Advanced Science
As a typical representative of Metastable intermolecular composites (MICs), the energy release of nano‐thermites relying on aluminum‐oxygen reaction is limited by the formation of high boiling point condensed phase products.
Xuwen Liu, Jingwei Li, Shenghua Feng, Yongsheng Jia, Maocong Hu, Yingkang Yao, Jinshan Sun, Quanmin Xie, Hongqian Sang   +8 more
doaj   +1 more source

Response Characteristics and Safety Criterion of Double-Arch Tunnel Under Blast-Induced Disturbance from New Tunnel Excavation

Applied Sciences
Blast-induced vibrations from newly constructed tunnels may adversely affect adjacent existing tunnel structures. To ensure the safety of the existing tunnel, it is essential to investigate its dynamic response under blast disturbances.
Youxin Shao, Zhen Zhang, Jinshan Sun, Yingkang Yao, Nan Jiang, Shimao Ma   +5 more
doaj   +1 more source