International Journal of Impact Engineering - 中国科学技术大学
proposed to investigate their dynamic crushing behaviours. By discretely modelling cell walls and cell faces, these finite element models can accurately represent the microstructural deformation mechanisms. Dynamic crushing of regular honeycombs was stud-ied by Ruan et al. [8] and a احصل على السعر
International Journal of Impact Engineering - 中国科学技术大学
for the shock strain and the shock speed of a constant-velocity impact scenario. This paper aims to present general solutions for a unified framework of plastic shock wave models, which may احصل على السعر
International Journal of Impact Engineering - 中国科学技术大学
in the dynamic crushing of cellular materials are related to the propagation of plastic shock or wave fronts. The idea of ‘structural احصل على السعر
Dynamic crushing of cellular materials: A unified framework of
2013/3/1 A unified framework of one-dimensional plastic shock wave models is presented. General solutions, although implicit, are derived for two impact scenarios. Closed-form احصل على السعر
The Effect of Elastic Stiffness on the Shock Wave Propagation in ...
2023/7/13 Based on the free-body diagram of sandwich structures, we distinguish three shock modes in the core crushing stage: single shock mode, single-single shock mode and احصل على السعر
Dynamic crushing of 2D cellular structures: Local strain field and ...
2013/7/1 Dynamic crushing of regular honeycombs was studied by Ruan et al. [8] and a deformation in a manner of shock wave propagation was observed under high impact احصل على السعر
Dynamic crushing of cellular materials: a particle
2019/4/30 Hugoniot relations between the dynamic response (i.e., shock wave speed, stress, and strain) and impact velocities were then established. It is worth noting that a linear Hugoniot relation between the shock wave speed احصل على السعر
[PDF] Dynamic crushing of cellular materials: Continuum-based
2012/4/1 DOI: 10.1016/J.IJIMPENG.2011.09.009 Corpus ID: 55823693; Dynamic crushing of cellular materials: Continuum-based wave models for the transitional and shock modes احصل على السعر
Mechanics of Materials - 中国科学技术大学
Wave propagation techniques, which contain no constitutive as- sumption, can be used to study the dynamic behavior of mate- rials (Wang et al., 2013 a). The application potential is that the احصل على السعر
Dynamic crushing of cellular materials: Continuum-based wave
2012/4/1 On the theoretical front, several models were proposed to explain the crushing behavior of foam materials under impact loading, with the simplest being the shock wave احصل على السعر
Principle of the shock tube. Download Scientific Diagram
Download scientific diagram Principle of the shock tube. ... are carried out to understand the dynamic forming behavior of friction stir spot-welded (FSSW) sheet made of AA 5052-H32 sheets of 1 ...احصل على السعر
(PDF) Effect of Relative Density on the Dynamic Impact Behaviors
2016/6/19 The results show that the shock wave speed at a specific impact velocity increases with the increase of the relative density of cellular structure in a certain extent.احصل على السعر
Dynamic crushing of cellular materials: Continuum-based wave
2012/4/1 Collectively, these models demonstrate the ability and effectiveness of the shock wave theory to capture the dynamic behavior of foam materials of uniform density under impact loadings ...احصل على السعر
Types of Crushers: What you need to know Machinery Partner
Impactor and hammer mill diagrams Tertiary crushing equipment and beyond. Sometimes you might need to continue to reduce the size of your crushed material, and a tertiary reduction may be desired (sometimes even further). Particle sizes range from 5" to 1" during this final stage. Tertiary crushing is highly valuable in the mineral processing ...احصل على السعر
EFFECT OF RELATIVE DENSITY ON SHOCK WAVE SPEED OF
3.1 The velocity field and shock wave speed The highly localized shock-like deformation is a typical deformation feature in cellular materials under dynamic crushing, which is classified as the Shock Mode [20]. The shock wave, which is used to characterize the layer-wise collapse [3], propagates from the loading end towards the supporting endاحصل على السعر
Dynamic crushing of cellular materials: Continuum-based wave
2012/4/1 Deformation front localisation and stress/strain non-uniformity in the dynamic crushing of cellular materials are related to the propagation of plastic shock or wave fronts. The idea of ‘structural shock’ propagation to model the ‘discontinuous’ behaviour was first used by Reid et al. [13] based on experiments on a one-dimensional ...احصل على السعر
[PDF] Dynamic crushing of cellular materials: Continuum-based wave
2012/4/1 DOI: 10.1016/J.IJIMPENG.2011.09.009 Corpus ID: 55823693; Dynamic crushing of cellular materials: Continuum-based wave models for the transitional and shock modes @article{Zheng2012DynamicCO, title={Dynamic crushing of cellular materials: Continuum-based wave models for the transitional and shock modes}, author={Zhijun Zheng and Yaodong Liu احصل على السعر
Schematic principles of form conditioned crushing (a), energy ...
Steady-state simulation represents an instantaneous mass balancing of the crushing plant circuit, while dynamic simulation can imitate timedependent phenomena in the crushing plant circuit such as ...احصل على السعر
Analysis of failure mechanical behavior and structural stability of ...
2024/11/1 Fig. 1 illustrates the categorization of rock loading into five types: creep [7, 8], quasi-static state [9, 10], medium strain rate [11, 12], high strain rate [13, 14], and ultrahigh strain rate [15, 16].Studies have shown that the rate of strain in rocks, concrete, and other materials greatly influences their mechanical strength [17].Generally, the load-bearing characteristics of احصل على السعر
Crushing force vs. Displacement of the structures for the cases of:
This work proposes a method for the shouted and multi speaker's vs normal and single speaker's speech classification, which is the most frequently occurring scenario in news debates.احصل على السعر
Concrete crushing based on the high-voltage pulse
2021/9/1 High-voltage pulse discharge (HVPD) technology has a broad prospect in concrete crushing. The model of concrete beam sections is established by ANSYS/LS-DYNA finite element software. The shock wave, caused by the electrohydraulic effect of HVPD with 50 kJ energy, is equivalent to an explosive blast shock load.احصل على السعر
Experimental research on the dynamic characteristics of
E XPERIMENTAL RESEARCH ON THE DYNAMIC CHARACTERISTICS OF UNDERWATER SHOCK WAVE PRESSURE SENSOR. C HUNDONG X U, L IANGQUAN W ANG ISSN P RINT 2345-0533, ISSN O NLINE 2538-8479, K AUNAS, L ITHUANIA 117 reflection when the underwater shock wave generated from explosion reached an end surface of the water shock احصل على السعر
Dynamic crushing of 2D cellular structures: Local strain field
2013/7/1 Shock wave velocity is measured by an approach that gives the location of the shock front varying with the impact time. A comparison of the cell-based finite element model with continuum-based shock models indicates that the shock model based on a material accounting for the post-locking behaviour is more accurate in predicting the shock wave ...احصل على السعر
Illustrations of the cracking strain and inelastic (or crushing ...
The integrity of the dam body is well maintained under the action of a small-quantity water explosion, and the dynamic response of the dam body is mainly caused by the shock wave. Both the shock ...احصل على السعر
Concrete crushing based on the high-voltage pulse
2021/9/1 High-voltage pulse discharge (HVPD) technology has a broad prospect in concrete crushing. The model of concrete beam sections is established by ANSYS/LS-DYNA finite element software. The shock wave, caused by the electrohydraulic effect of HVPD with 50 kJ energy, is equivalent to an explosive blast shock load.احصل على السعر
Experimental research on the dynamic characteristics of
E XPERIMENTAL RESEARCH ON THE DYNAMIC CHARACTERISTICS OF UNDERWATER SHOCK WAVE PRESSURE SENSOR. C HUNDONG X U, L IANGQUAN W ANG ISSN P RINT 2345-0533, ISSN O NLINE 2538-8479, K AUNAS, L ITHUANIA 117 reflection when the underwater shock wave generated from explosion reached an end surface of the water shock احصل على السعر
Dynamic crushing of 2D cellular structures: Local strain field
2013/7/1 Shock wave velocity is measured by an approach that gives the location of the shock front varying with the impact time. A comparison of the cell-based finite element model with continuum-based shock models indicates that the shock model based on a material accounting for the post-locking behaviour is more accurate in predicting the shock wave ...احصل على السعر
Illustrations of the cracking strain and inelastic (or crushing ...
The integrity of the dam body is well maintained under the action of a small-quantity water explosion, and the dynamic response of the dam body is mainly caused by the shock wave. Both the shock ...احصل على السعر
Dynamic crushing of 2D cellular structures: Local strain field
2013/7/1 Continuum-based shock models have been proposed by different authors to understand the strength enhancement and deformation localization phenomena observed in the dynamic response of cellular materials, but their applicability is still debatable due to continuum-based stress wave theory being used to cellular materials with finite cell sizes. A method احصل على السعر
Working Principle of Crushers - 911Metallurgist
2016/2/18 Working Principle of Crushers. On left is a showing of the “standard gyratory with straight concaves” is a section through any vertical, radial plane in the crushing chamber of one of the intermediate sizes of the crusher. In order to understand the crushing action in such a chamber it is helpful to consider the process as though each step took place in an orderly, and احصل على السعر
Dynamic response of functionally graded cellular materials
2016/2/1 N nuclei are generated in a square area A 0 according to the principle that the distance between any two points is not less than a given distance δ.Then these nuclei are copied to the surrounding neighboring areas by translation. The set of these 9N nuclei are used to construct the Delaunay triangulation and even the Voronoi diagram. A Voronoi cell could احصل على السعر
Thermophysical-mechanical behaviors of hot dry granite subjected
2024/9/7 Early studies of temperature-dependent rock mechanics are focused on the static or quasi-static loading, where the P-wave velocity, thermal conductivity, strength, and elastic modulus of rocks gradually decrease with increasing temperature, while the peak strain and porosity increases (Qin et al., 2020; Zhu et al., 2023).With the split Hopkinson pressure bar احصل على السعر
The Effect of Elastic Stiffness on the Shock Wave Propagation in ...
2023/7/13 Based on the free-body diagram of sandwich structures, we distinguish three shock modes in the core crushing stage: single shock mode, single-single shock mode and single-double shock mode. Using the R-PP-L model and the one-dimensional shock wave theory, we give the governing equations for the three shock modes and obtain the evolution of ...احصل على السعر
Dynamic crushing of cellular materials: Continuum-based wave
2012/4/1 As shown in the extensive studies of the dynamic responses of cellular materials, when the impact velocity is high, ‘shock’ waves can be generated. Because of the nature of the cellular structure, behind the ‘shock (or compaction) front’, there is a region of thickness approximately one single-cell-layer, across which the deformation can vary enormously, with احصل على السعر
Dynamic crushing of cellular materials: Continuum-based shock wave ...
Dynamic crushing of cellular materials: Continuum-based shock wave models for the transitional and shock modes. Z Zhijun Zheng, Y Liu, J Yu, Stephen R Reid. Engineering; University of Science and Technology of China; Research output: Contribution to journal › Article › peer-review.احصل على السعر
Construction, Working and Maintenance of Crushers for
between the crushing elements (mantle and concaves), finally exiting the crushing chamber at the bottom under the influence of gravity. The crushing elements, mantle and concaves are made of high wear resistant material. The crushing gap is adjusted by hydraulically lifting or lowering the main shaft by the hydraulic cylinder.احصل على السعر
On the Mechanism of High-Voltage Pulsed Fragmentation from
2021/6/19 When the principle of electrical crushing work, the plasma channel is formed into the rock, and the generated stress wave directly acts inside of the rock. Obviously, electrical crushing can achieve sufficient breaking and its efficiency is higher. Therefore, the principle of electrical crushing is mainly applied for the development of HVPF tools.احصل على السعر
The Effects of Nuclear Weapons - Glasstone and Dolan Chapter IV
4.06 As the wave front moves forward, the reflected overpressure on the face of the structure drops rapidly to that produced by the blast wave without reflection, 1 plus an added drag force due to the wind (dynamic) pressure. At the same time, the air pressure wave bends or “diffracts” around the structure, so that the structure is ...احصل على السعر
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