Effects of the Number of Fatigue Cycles on the Hoop Tensile Strength of Glass Fiber/Epoxy Composite Pipes
- PDF / 840,163 Bytes
- 6 Pages / 595.276 x 790.866 pts Page_size
- 55 Downloads / 271 Views
TECHNICAL ARTICLE—PEER-REVIEWED
Effects of the Number of Fatigue Cycles on the Hoop Tensile Strength of Glass Fiber/Epoxy Composite Pipes Memduh Kara . Muhammed Kirici . Suleyman Cinar Cagan
Submitted: 29 May 2019 / Published online: 3 September 2019 ASM International 2019
Abstract Glass fiber-reinforced plastics (GFRPs) composite materials are widely used in many areas due to their superior properties such as high strength, corrosion resistance against many chemicals, duplicate production, the possibility of production in very large dimensions, and lighter weight than metals and alloys. As the use of GFRP pipes increases, many test methods are performed to determine their mechanical properties. Hoop tensile strength of GFRP pipes was determined by hoop tensile strength test according to ASTM D 2290 standard, and fatigue tests of GFRP pipes were carried out by applying internal hydraulic pressure according to ASTM D 2992 standard. In this study, six-layered E-glass epoxy composite pipes which were manufactured by the filament wound method for winding angle ± 55 were subjected to fatigue tests at the different number of cycles, and hoop tensile strength of fatigued pipes was determined. The samples were subjected to a fatigue test at a stress ratio of 0.05 and a frequency of 0.42 Hz according to ASTM D 2992 standard. Fatigue tests were performed on samples with a stress value of 35% static burst pressure. As a result of experiments, the effects of the number of fatigue cycles on the hoop tensile strength of the GFRP pipes were investigated, and the damage occurred in the GFRP pipes was evaluated. The increase in the number of cycles from the fatigue tests applied to the samples resulted in a reduction in the tensile strength of the samples. M. Kara S. C. Cagan (&) Department of Mechanical Engineering, Engineering Faculty, Mersin University, Yenisehir, Mersin, Turkey e-mail: [email protected] M. Kirici Department of Metallurgical and Materials Engineering, Selcuk University, Konya, Turkey
Keywords GFRP Composite pipe Fatigue Hoop tensile strength test
Introduction The composite materials obtained by adding glass fibers as a reinforcing material to the epoxy resin are called glass fiber-reinforced plastic materials. It has become important to implement many areas because GFRPs have advantageous properties such as high strength, corrosion resistance against many chemicals, duplicate production, possibilities of production in very large dimensions, and lighter weight than metals and alloys. One of the applications of GFRPs is pipe manufacturing, which has an important place in the industry. GFRP pipes are used in many fields such as drinking water lines, marine discharge lines of wastewater facilities, transmission lines of hydroelectric power plants, underpasses, GFRP tanks, and silos. Numerous studies have been carried out on the investigation and improvement in the mechanical properties by increasing the use of GFRP pipes. Hawa et al. [1] have investigated the effects of aging time on impact beha
Data Loading...
