scholarly journals Characterization of Cellulosic Fibres from Coconut Peduncle Leaf Stalk Fibres (CPLSF)

2021 ◽  
Vol 36 (1) ◽  
pp. 204-208
Author(s):  
Dr.M. Mohan Prasad ◽  
Dr.S. Padmavathy ◽  
P. Gowshick ◽  
P. Kavinkumar ◽  
O.A. Kishore
Keyword(s):  
Mechanical Properties ◽  
High Pressure ◽  
Testing Machine ◽  
Distilled Water ◽  
Universal Testing ◽  
Naoh Solution ◽  
Pressure Water ◽  
High Pressure Water Jet ◽  
Cellulosic Fibres

In this examination the Mechanical Properties of Coconut Leaf Stalk Fibre Peduncle is found for the various lengths (3mm, 6mm, 9mm) are taken and treating with two different process. One set of fibre is washed with the distilled water and another set of fibre is treated with sodium hydroxide (NaOH) solution to increase the strength of the fibre. Here the NaOH mixer is about 5% are considered. After treatment the fibre are dried for 2 days and cut to the required sample size. All sample composite materials were made using the standard die (hand layup method) and samples were cut using high-pressure water jet cutter as per ASTM standard. The test was taken with ASTM D638, ASTM D790 and ASTM D256 standard Universal testing machine (UTM). The result exemplify that the 6 mm alkali-treated CPLSF (6 NTCPLSF) composite exhibited the maximum tensile strength of 26.14MPa, the flexural strength of 79.81MPa and impact strength (Izod) 9.7 kJ/m2.

Experimental Study on Enhancement of Steel Mechanical Properties by High Pressure Jet Quenching

2014 ◽  
Vol 893 ◽  
pp. 634-637
Author(s):  
Chia Hao Chang ◽  
Fang Zhou Lin ◽  
Zong Han Lee ◽  
Bo Han Wang ◽  
Rin Yo Huang ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
High Pressure ◽  
Test Sample ◽  
Jet Quenching ◽  
Metallographic Analysis ◽  
Quenching Process ◽  
Pressure Water ◽  
High Pressure Water Jet ◽  
Martensite Microstructure ◽  
Martensite Structure

The purpose of this study is to enhance the strength of steel by increasing the percentage of martensite microstructure with a high pressure water jet quenching. JIS SS400 carbon steel was chosen as a test sample. The cooling rate of surface and center reached approximately 180oC/sec and 65oC/sec, respectively. After this quenching process, the metallographic analysis showed that the steel turned into martensite structure. Furthermore, the tensile strength of sample increased from 363MPa to 543MPa; the yielding strength increased from 284MPa to 420Mpa. In general, the overall enhancement of mechanical strength was about 140%.

The mechanism and application of high-pressure water jet technology to prevent compound dynamic disaster

2021 ◽  
Vol 14 (13) ◽  
Author(s):  
Zeng-qiang Yang ◽  
Chang Liu ◽  
Feng-shuo Li ◽  
Lin-ming Dou ◽  
Gang-wei Li ◽  
...  
Keyword(s):  
High Pressure ◽  
Water Jet ◽  
Pressure Water ◽  
Dynamic Disaster ◽  
High Pressure Water Jet

scholarly journals Mechanical Properties of the Composite Material consisting of β-TCP and Alginate-Di-Aldehyde-Gelatin Hydrogel and Its Degradation Behavior

Materials ◽  
2021 ◽  
Vol 14 (5) ◽  
pp. 1303
Author(s):  
Michael Seidenstuecker ◽  
Thomas Schmeichel ◽  
Lucas Ritschl ◽  
Johannes Vinke ◽  
Pia Schilling ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Compressive Strength ◽  
Protein Concentration ◽  
Failure Load ◽  
Testing Machine ◽  
Experimental Period ◽  
Flow Chamber ◽  
Degradation Behavior ◽  
Gelatin Hydrogel ◽  
Universal Testing

This work aimed to determine the influence of two hydrogels (alginate, alginate-di-aldehyde (ADA)/gelatin) on the mechanical strength of microporous ceramics, which have been loaded with these hydrogels. For this purpose, the compressive strength was determined using a Zwick Z005 universal testing machine. In addition, the degradation behavior according to ISO EN 10993-14 in TRIS buffer pH 5.0 and pH 7.4 over 60 days was determined, and its effects on the compressive strength were investigated. The loading was carried out by means of a flow-chamber. The weight of the samples (manufacturer: Robert Mathys Foundation (RMS) and Curasan) in TRIS solutions pH 5 and pH 7 increased within 4 h (mean 48 ± 32 mg) and then remained constant over the experimental period of 60 days. The determination surface roughness showed a decrease in the value for the ceramics incubated in TRIS compared to the untreated ceramics. In addition, an increase in protein concentration in solution was determined for ADA gelatin-loaded ceramics. The macroporous Curasan ceramic exhibited a maximum failure load of 29 ± 9.0 N, whereas the value for the microporous RMS ceramic was 931 ± 223 N. Filling the RMS ceramic with ADA gelatin increased the maximum failure load to 1114 ± 300 N. The Curasan ceramics were too fragile for loading. The maximum failure load decreased for the RMS ceramics to 686.55 ± 170 N by incubation in TRIS pH 7.4 and 651 ± 287 N at pH 5.0.

Crowning Carrots with a High Pressure Water Jet

1988 ◽  
Vol 4 (4) ◽  
pp. 340-343 ◽  
Author(s):  
John H. Posselius ◽  
Jr.. Glenn T. Conklin
Keyword(s):  
High Pressure ◽  
Water Jet ◽  
Pressure Water ◽  
High Pressure Water Jet

Damage Analysis and Simulation of Rock under High Pressure Waterjet

2011 ◽  
Vol 462-463 ◽  
pp. 774-779
Author(s):  
Hu Si ◽  
Xiao Hong Li ◽  
Yan Ming Xie
Keyword(s):  
High Pressure ◽  
Damage Mechanics ◽  
Water Jet ◽  
Penalty Function Method ◽  
Impulsive Effect ◽  
Contact Method ◽  
Arbitrary Lagrangian Eulerian ◽  
Rock Breakage ◽  
Pressure Water ◽  
High Pressure Water Jet

The high pressure waterjet is widely applied for mine industry, mechanical manufacture, environmental engineering, and medicine field due to its particular characteristic. Recently, the application of high pressure waterjet for gas drainage in mine has been receiving increasing attention with the development of exploitative technology. The micro-damage mechanism of coal under high pressure water jet is key to drain gas effectively. Based on damage mechanics and rock dynamics, the paper analyzed the micro-structure deformation and damage of rock and the impulsive effect under high pressure water jet and developed the dynamic model. Further, on the assumption of that rock was homogeneous and isotropic, a computational model was established based on the Arbitrary Lagrangian Eulerian (ALE) fluid-solid coupling penalty function method. The rock damage under high pressure water jet was simulated by the dynamic contact method. The results showed that the damage and breakage of ruck was mainly attributed to impacting effect and was characterized by local effect, and the evolvement of rock breakage went through three stages and the figure of rock breakage trended a funnel. On the whole, numerical results agreed with experimental results.

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