Crack Formation in Cement-Based Composites

Autor:	Leonids Pakrastinsh, Nikolai Vatin, Andina Sprince
Rok vydání:	2016
Předmět:	Crack closure Cracking Materials science Tension (physics) Ultimate tensile strength Crack tip opening displacement Fracture mechanics Composite material Crack growth resistance curve Extensometer
Zdroj:	IOP Conference Series: Materials Science and Engineering. 123:012050
ISSN:	1757-899X 1757-8981
DOI:	10.1088/1757-899x/123/1/012050
Popis:	The cracking properties in cement-based composites widely influences mechanical behavior of construction structures. The challenge of present investigation is to evaluate the crack propagation near the crack tip. During experiments the tension strength and crack mouth opening displacement of several types of concrete compositions was determined. For each composition the Compact Tension (CT) specimens were prepared with dimensions 150×150×12 mm. Specimens were subjected to a tensile load. Deformations and crack mouth opening displacement were measured with extensometers. Cracks initiation and propagation were analyzed using a digital image analysis technique. The formation and propagation of the tensile cracks was traced on the surface of the specimens using a high resolution digital camera with 60 mm focal length. Images were captured during testing with a time interval of one second. The obtained experimental curve shows the stages of crack development.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::4dbe352f7516893f4a17698a4facee22 https://doi.org/10.1088/1757-899x/123/1/012050 Zobrazit plný text záznamu