Synthetic granite composite for precision equipment structures

ABSTRACT The structure is a component that plays an extremely important role in the equipment’s performance, it must withstand efforts without compromising the function, receive and transfer heat, dampen vibrations and position the elements, as well as promote ergonomics and aesthetics. In lightweig...

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Bibliographic Details
Published inMatéria Vol. 23; no. 4
Main Authors Lovo, João Fiore Parreira, Pedroso, Marcos Paulo Gonçalves, Erbereli, Rogério, Purquerio, Benedito de Moraes, Fortulan, Carlos Alberto
Format Journal Article
LanguageEnglish
Portuguese
Published Rede Latino-Americana de Materiais 01.01.2018
Subjects
CONSTRUCTION & BUILDING TECHNOLOGY
MATERIALS SCIENCE, MULTIDISCIPLINARY
METALLURGY & METALLURGICAL ENGINEERING
Synthetic granite
damping
composite
machine structure
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Summary:ABSTRACT The structure is a component that plays an extremely important role in the equipment’s performance, it must withstand efforts without compromising the function, receive and transfer heat, dampen vibrations and position the elements, as well as promote ergonomics and aesthetics. In lightweight and precision equipment’s the raw material used must also allow thin walls, rigid, resistant and low density. The objective of the present work is the development of a synthetic granite composite for manufacturing of equipment’s structures. For this, an abundant Brazilian granite, a high strength epoxy resin and segmented carbon fibers were selected as materials. Test specimens, with maximized packing with granite gravel less than 2.0 mm were fabricated and tested for tensile strength, compression, flexural, damping, hardness, dilatometry, thermal conductivity and density. The maximized composition supported flexural stresses above 42 MPa, without fiber reinforcement and 51 MPa with carbon fiber reinforcement. The damping coefficient was about 7 times higher than cast iron, coefficient of thermal expansion of 1.4E-05 m/m.K, thermal conductivity coefficient of 1.2 W/m.K and density of 2.1 g/cm3. The developed composite showed potential for refining structures, with ease of molding of thin-walled elements, use of inserts, re-machining, providing economical manufacture of single parts, and is still able to perform the function with high damping coefficient and low weight.
ISSN:1517-7076
1517-7076
DOI:10.1590/s1517-707620180004.0563