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Pankaj Rana, Dharmpal Deepak MECHANICAL PROPERTIES OF ABACA FIBER BASED REINFORCED POLYURETHANE COMPOSITE

Natural Fiber Based Polymer Composites

Technik
Englisch
8932 Wörter
Ab 12 Jahren
91
1

From last few decades’ composite materials, ceramics and plastics has made a mark in the field of materials. Applications of these materials in engineering arespecially attributed to their low specific weight and comparatively high strength. Applications of composite materials vary from the basic daily needs to sophisticated luxury applications. The demand of natural fiber in the composite materials has been increased owing to low density, low cost and biodegradable properties of natural fiber.But at the same time the natural fibers has certain disadvantages viz. they are hydrophilic in nature due to which there is poor incompatibility of natural fiber with the matrix. This intensity of this disadvantage can be reduced with the help of chemical treatment of natural fibers. Natural fiber has tendency of water absorption, which can also be reduced with chemical treatment. There are number of factors which affect the properties of natural fiber reinforced composite viz. fabrication method, environment condition during fabrication, fiber and its quantity, matrix material. Any slight modification in the above said variables leads to change in the properties of the final composite material. In the present work, the tensile and flexural properties of natural fiber (abaca fiber) reinforced TPU composites have been investigated. The content of natural fiber in composites has been varied from 0 to 30 wt%. The reinforced fibers were chemically treated with NaOH followed by treatment with maleic anhydride in acetone, prior to fabricating of samples by injection moulding. It is observed that the composite containing 10 wt% of abaca fiber has highest tensile strength among all the composites fabricated for this study, whereas the tensile strength of pure TPU sample has maximum among all the samples fabricated during this research work.Maximum flexural strength is observed ofthe composite containing 30 wt% of abaca fiber.SEM examinations of the fractured surface reveal that primary failure mechanisms in composite as fiber fracture and fiber pull-out. [mehr]

Stichwörter: Natural Fiber, Polyurethrane, Composite, Mechanical Testing

3,99 US$

Nitin Dhawan, Dharmpal Deepak PROCESS PARAMETERS OF AL ALLOY CASTINGS PRODUCED BY HIGH PRESSURE DIE CASTING

Aluminium Alloy Castings

Technik
Englisch
16598 Wörter
Ab 12 Jahren
240
0

In the current study, an industrial product (electrical wire connector) have been casted in cold chamber die casting process using LM2 aluminium alloy to produce certain specimens to be assessed under the study for the determination of the responses ( mechanical properties such as impact strength, hardness and surface roughness). As cold chamber die casting is being popularly known for its efficient and accurate casting process which can process a broad range of castings with intricate shape easily, hence it requires a lot of study in controlling the process variables with optimum combination of process variables to produce defect free and sound casting. Therefore in the current study, the process variables such as pouring temperature (725oC, 750oC, 775oC), intensification pressure (170 kg/cm2, 180 kg/cm2, 190 kg/cm2), type of coating (oil+graphite coating, dycote+graphite coating and dycote coating) and type of cooling (air cooling, water cooling and oil cooling) have been varied at three levels and 9 different experiments have been designed using Taguchi array (L9 orthogonal array) to assess the effects of different combinations of process variables over the mechanical properties (impact strength, hardness and surface roughness). The study aims at selecting the optimum combination process variables on the basis of the responses resulted in the 9 experiments. The graphs for the responses (impact strength, hardness and surface roughness) against each process variables have been plotted and carefully observed to identify the significant process variable along with respective level of operation affecting the respective response. From the overall study, intensification pressure was concluded to be the most significant process variable with maximum contribution to the impact strength and surface finish. The micrograph images captured corresponding to the respective levels of intensification pressure (170 kg/cm2, 180 kg/cm2, 190 kg/cm2) revealed the presence of shrinkage porosity corresponding to lowest level of intensification pressure (170 kg/cm2) and with further increase in intensification pressure led to a decrease in the extent of presence of porosity. Dycote coating was considered as the most optimum coating with significant contribution to the hardness. Air cooling and oil cooling were equally significant process variables with equivalent contribution to the mechanical properties. [mehr]

Stichwörter: Aluminium Alloy Castings;, Cold Chamber High Pressure Die Casting, Mechanical Testing

3,49 US$

Galoperiscol testing

Musik
Englisch
2 Wörter
Keine Altersempfehlung
301
2

Kostenlos

isaax isaax Testing Book

Abenteuer
Englisch
1138 Wörter
Keine Altersempfehlung
269
0

This is a test

Kostenlos

Paul White Mechanical Mike

An Electric Eclectic book

Belletristik
Englisch
5852 Wörter
Ab 12 Jahren
174
0

I had much so much fun in creating this story it has encouraged me to venture into writing more tales in the realms of 'Comic book /Pu;p fiction' Science fiction. Mechanical Mike is a fun tale, a modern pulp fictional story of Metal Robotics, Nazi-occupied France and Love. I originally penned this for a science fiction website that never became a reality, so with a few alterations and edits, I have made Mechanical Mike into an Electric Eclectic Novelette. Enjoy. [mehr]

Stichwörter: Robots, pulp fiction, Nazi, fun, Paris, love, wartime, scientist, girl

3,99 US$

JOSHUA ROSE MECHANICAL DRAWING SELF-TAUGHT

Belletristik
Englisch
57548 Wörter
Ab 18 Jahren
2
1

The object of this book is to enable the beginner to learn to make simple mechanical drawings without the [mehr]

Kostenlos

Joshua Rose Mechanical Drawing Self-Taught

Belletristik
Englisch
68163 Wörter
Ab 18 Jahren
2
0

Joshua Rose (born 16 December 1981 in Rockhampton, Queensland) is an Australian football (soccer) player who plays for [mehr]

Kostenlos

Larissa Feldhaber Feeling mechanical hearts

Science Fiction
Deutsch
12829 Wörter
Ab 16 Jahren
145
0

Nachdem Scarlett von ihrem Mann fast tot gefahren wurde, weil er es nicht akzeptieren wollte, dass sie zeugungsunfähig ist, zog sie zu ihrer Oma. Da sie jedoch nichts mehr aß und Schwierigkeiten hatte, zu akzeptieren, dass sie nun querschnittsgelähmt bleiben würde, rief ihre Oma ihre Schwester Giséle um Hilfe. Ihre Schwester bot ihr an zu ihr zu ziehen, um auf andere Gedanken zu kommen. Aber war dies wirklich eine gute Idee gewesen zu ihrer Schwester zu ziehen? Giséle hatte ein Geheimnis. Würde Scarlett dahinter kommen und würde sie auch bei ihrem Pfleger Daniel, der ein Android ist, bleiben und ihn lieben können? Oder würde sie zu ihrer Oma zurückkehren? [mehr]

Stichwörter: Androiden, Geschwister, Verrat, Gefühle, Erotik, Liebe

Kostenlos

Mrs. Humphry Ward The Testing of Diana Mallory

Belletristik
Englisch
147389 Wörter
Keine Altersempfehlung
504
1

Kostenlos

Mrs.Humphry Ward The Testing of Diana Mallory

Belletristik
Englisch
153726 Wörter
Ab 18 Jahren
2
0

Prolific English novelist, critic, journalist, memoirist, settlement house organizer, and opponent of women's suffrage who was the author of Robert Elsmere (1888), one of the most famous religious novels of the 19th century . Name variations: Mary Augusta Arnold (1851–1871); Mary Augusta Ward (1871–1920); Mrs. Humphry Ward (in all publications). Born Mary Augusta Arnold in Hobart Town, Tasmania, on June 11, 1851; died in London, England, on March 24, 1920; eldest of eight children of Thomas Arnold (second son of Dr. Thomas Arnold, headmaster at Rugby) and Julia (Sorrell or Sorell) Arnold (1826–1888); sister of Julia Arnold Huxley (1862–1908); married Thomas Humphry Ward, in 1872; children: Dorothy Ward (b. 1874); Arnold (b. 1876); Janet Ward (b. 1879). [mehr]

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eBooks „Mechanical Testing“

Bücher (28)

eBooks „Mechanical Testing“

Bücher (28)

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