Investigation on Steel Fiber Composite Beam Using Fracture Mechanics Approach
Sk. Amreen1, P. Poluraju2

1Sk. Amreen, Department of Civil Engineering, Koneru Lakshmaiah Education Foundation Deemed to be University, Guntur (A.P), India.
2Dr. P. Poluraju, Associate Professor, Department of Civil Engineering, Koneru Lakshmaiah Education Foundation Deemed to be University, Guntur (A.P), India.
Manuscript received on 29 April 2019 | Revised Manuscript received on 13 May 2019 | Manuscript Published on 28 May 2019 | PP: 27-31 | Volume-7 Issue-6C2 April 2019 | Retrieval Number: F10060476C219/2019©BEIESP
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Abstract: Fracture mechanics is the field of mechanics based on energy principles. The crack propagates in a material when energy dissipation is more. The existence of pores and cracks which are stable are not considered while designing a structure under ultimate load in stress-strain criteria, but their presence is included in energy based principles i.e., fracture mechanics. The fracture mechanics study determines the ductile behavior of a particular structure under loading conditions using following parameters such as fracture energy, stress intensity factor, fracture process zone etc., The ductile and toughness nature of a concrete elements will be increased by incorporation of steel fiber in a normal concrete defined as steel fiber reinforced concrete (SFRC). In this present study, the experimental work has been carried out on steel fiber reinforced concrete notched beams by varying notch to depth ratio as recommended by RILEM (fracture test) tested under three point bending test (TPBT). The behavior of notched beams has been assessed through load-deflection curve, crack pattern resulted from three point bending test which are required to find the fracture parameters such as fracture energy and stress intensity factor. It is been observed from the experimental study, the energy dissipation produced by the crack was shortened by the usage of steel fiber.
Keywords: Fracture Energy, Notch to Depth Ratio, Stress Intensity Factor, Steel Fiber Reinforced Concrete.
Scope of the Article: Composite Materials