Observation of High-Speed Fracture Phenomena of Glass Containers by Using Underwater Shockwave

2011 ◽  
Vol 673 ◽  
pp. 53-58 ◽  
Author(s):  
Shinjiro Kawabe ◽  
Hidetoshi Sakamoto ◽  
Yoshifumi Ohbuchi ◽  
Shigeru Itoh
Keyword(s):  
High Speed ◽  
Fem Simulation ◽  
High Speed Photography ◽  
Explosive Energy ◽  
Generation Technique ◽  
Glass Containers ◽  
Fracture Behaviors

The glass containers crushing process for recycling by using underwater shockwave was observed and the new cullet generation technique by explosive energy was proposed. In this study, the high-speed fracture behaviors of glass containers were visualized by using the high-speed photography and FEM simulation.

Observation of High Speed Glass Bottle Fracture Behaviors by Underwater Shockwave

2012 ◽  
Vol 586 ◽  
pp. 151-155
Author(s):  
Kosuke Nagata ◽  
Hidetoshi Sakamoto ◽  
Yoshifumi Ohbuchi ◽  
Hiroyuki Kuramae ◽  
Eiji Nakamachi
Keyword(s):  
High Speed ◽  
Fracture Process ◽  
Glass Bottle ◽  
Explosive Energy ◽  
Washing Process ◽  
Fracture Behaviors ◽  
Glass Bottles ◽  
Glass Recycling

This paper described new effective glass bottle fracture process for glass recycling by underwater shockwave. The high-speed fracture behaviors of glass bottles by explosive energy were discussed. In the proposed technique, the washing process can be skipped because the bottle crushing process execute in water. As a result, the recycling cost can be decreased. In order to clarify the behaviors of glass bottle fracture, the bottle was painted by 5 colors. The crushing experiment was executed under four explosive conditions. The influence of various explosive conditions on the cullet sizes were calcified by using painted bottle.

Investigation of chip formation and burr control in PCB fixture hole

Circuit World ◽  
2015 ◽  
Vol 41 (2) ◽  
pp. 61-69 ◽  
Author(s):  
Lixin Huang
Keyword(s):  
High Speed ◽  
Fem Simulation ◽  
Circuit Board ◽  
Hole Drilling ◽  
High Speed Photography ◽  
Drilling Process ◽  
Feed Speed ◽  
Content Type ◽  
Helical Angle ◽  
Exit Burr

Purpose – This paper aims to analyze their generation mechanism and factors influencing burr generation. The final goal is to use appropriate drill design and drilling process to control the generation of burrs. Design/methodology/approach – The mechanism of burr generation was studied through finite element method (FEM) simulation and drilling experiments. High-speed photography technology and scanning electron microscope (SEM) were used in this study. Findings – High-speed drilling burr is a printed circuit board (PCB) copper foil burr. Within a certain range, the feed speed and burr height is in positive correlation, and decrease in the feeding speed will favor the exit burr. Drill angle influences burr and chisel edge affect significantly, followed by the point angle, and helical angle has little effect. From the perspective of reducing the burr, a smaller chisel edge and smaller point angle should be chosen. Grinding chisel edge is another choice to decrease the burr but also ensures the blade strength. Originality/value – This paper investigates the mechanism of burr generation of PCB fixture hole drilling. The process of burr generation was captured by high-speed camera. The controlling methods of burr generation were illustrated at the end.

The Study about “Cullet” Generation Technique and Application for Recycling System by Using Underwater Shockwaves

2007 ◽  
Vol 566 ◽  
pp. 231-236 ◽  
Author(s):  
S. Kawabe ◽  
Hidetoshi Sakamoto ◽  
Masahiro Himeno ◽  
T. Ono ◽  
Shigeru Itoh
Keyword(s):  
Fracture Mechanism ◽  
High Speed ◽  
Fem Simulation ◽  
Recycling Process ◽  
Recycling System ◽  
Generation Technique ◽  
Washing Process ◽  
Glass Bottles ◽  
Photography Method

The high-speed fracture mechanism of glass bottles by using underwater shockwave and the recycling process by crushing the glass bottles were discussed. The proposed crushing process of the glass bottles can decrease the recycle cost by generating small fragments called "Cullet" and by executing the washing process at the same time as the crushing process. In this study, the relations between the "Cullet" sizes and various explosive conditions, that is, the distance from explosive, the amount, the velocity and the shapes of explosive, were clarified by using beer bottles, and the influence of the serial and concentric arrangements of two or more bottles on "cullet" sizes were examined. Moreover the behaviors of the underwater shockwave were observed by framing photograph method, shadowgraph method, illumination photography method and the FEM simulation was executed in order to make clear the high speed fracture mechanism.

DEFORMATION BEHAVIOR OF POLYMERIC MATERIALS BY TAYLOR IMPACT

2008 ◽  
Vol 22 (09n11) ◽  
pp. 1235-1242 ◽  
Author(s):  
HYUNG-SEOP SHIN ◽  
SUNG-TAEK PARK ◽  
SEE-JO KIM ◽  
JOON-HONG CHOI ◽  
JEONG-TAE KIM
Keyword(s):  
Strain Rate ◽  
High Speed ◽  
Polymeric Materials ◽  
High Speed Photography ◽  
Air Gun ◽  
Deformation And Fracture ◽  
Governing Factor ◽  
Fracture Behaviors ◽  
The Impact ◽  
Impact Experiments

The deformation of polymers under high loading-rate conditions will be a governing factor to be considered in their impact-resistant applications such as protective shields and armors. In this study, the deformation and fracture behaviors of polymeric materials such as PE, PC and PEEK have been investigated by Taylor cylinder impact tests with the high speed photography. A 20 mm air gun was used to perform the impact experiments. Cylindrical projectiles have been impacted onto a hardened steel anvil at a velocity ranging from 120 to 320 m/s. After impact experiments, the shape of projectiles was examined and compared with high speed photographic images to distinguish the elastic deformation component from the deformation measured instantaneously. Each adopted material showed different deformation and fracture behaviors. As compared with the quasi-static cases all polymers showed a significant strain rate hardening when the strain rate used was over 6 × 103 s −1. This appeared most significant in PE.

“Glass Cullet” Generation Technique by Underwater Shockwave for Recycling System of Glass Bottles

2007 ◽  
Vol 353-358 ◽  
pp. 3120-3123
Author(s):  
Shinjiro Kawabe ◽  
Hidetoshi Sakamoto ◽  
Kazuo Satoh ◽  
Masahiro Himeno ◽  
Shigeru Itoh
Keyword(s):  
High Speed ◽  
Fem Simulation ◽  
Fracture Propagation ◽  
Cleaning Process ◽  
Glass Cullet ◽  
Underwater Shock Wave ◽  
Recycling System ◽  
Generation Technique ◽  
Underwater Shock ◽  
Glass Bottles

The high-speed fracture mechanics of glass bottles by using underwater shockwaves technique and its application for recycling system of glass bottles were discussed. The proposed small fragments, also called “Cullet”, generation technique can decrease the recycling cost by carrying out of crashing and cleaning process simultaneously. In this study, the effects of the explosive conditions and multi-specimen’s arrangements on the “Cullet” sizes were investigated and basic data for commercialization of this method were obtained. An FEM simulation and framing photograph were used to observe underwater shock wave and fracture propagation.

Crack divergence phenomena in tempered glass

2020 ◽  
Vol 13 (3) ◽  
pp. 115-129
Author(s):  
Shin’ichi Aratani
Keyword(s):  
Optimal Design ◽  
High Speed ◽  
Glass Plate ◽  
Acute Angle ◽  
Divergence Angle ◽  
High Speed Photography ◽  
Tempered Glass ◽  
Thick Glass

High speed photography using the Cranz-Schardin camera was performed to study the crack divergence and divergence angle in thermally tempered glass. A tempered 3.5 mm thick glass plate was used as a specimen. It was shown that two types of bifurcation and branching existed as the crack divergence. The divergence angle was smaller than the value calculated from the principle of optimal design and showed an acute angle.

Experimental study of hydrodynamic effects in the inverse water hydrocarbon emulsions flow in microchannels

2016 ◽  
Vol 11 (1) ◽  
pp. 30-37 ◽  
Author(s):  
A.A. Rakhimov ◽  
A.T. Akhmetov
Keyword(s):  
High Speed ◽  
Petroleum Industry ◽  
Chemical Compounds ◽  
High Viscosity ◽  
Blocking Effect ◽  
High Speed Photography ◽  
Simple Chemical ◽  
Reported Study ◽  
Dynamic Blocking ◽  
Hydrodynamic Effects

The paper presents results of hydrodynamic and rheological studies of the inverse water hydrocarbon emulsions. The success of the application of invert emulsions in the petroleum industry due, along with the high viscosity of the emulsion, greatly exceeding the viscosity of the carrier phase, the dynamic blocking effect, which consists in the fact that the rate of flow of emulsions in capillary structures and cracks falls with time to 3-4 orders, despite the permanent pressure drop. The reported study shows an increase in viscosity with increasing concentration or dispersion of emulsion. The increase in dispersion of w/o emulsion leads to an acceleration of the onset of dynamic blocking. The use of microfluidic devices, is made by soft photolithography, along with high-speed photography (10,000 frames/s), allowed us to see in the blocking condition the deformation of the microdroplets of water in inverse emulsion prepared from simple chemical compounds.

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