Abstract
The paper presents the results of an investigation conducted to assess the fatigue-life and prediction of flexural fatigue strength of polymer concrete composites based on epoxy resin as binder material. Three point flexural fatigue tests were conducted on polymer concrete specimens using MTS servo controlled actuator, to obtain the fatigue lives of the composites at different stress levels. One hundred and thirty-seven specimens of size 40×40×160 mm were tested in flexural fatigue. Forty-three static flexural tests were also conducted to facilitate fatigue testing. It has been observed that the probabilistic distribution of fatigue-life of polymer concrete composite (PCC) and glass fibre reinforced polymer concrete composite (GFRPCC), at a particular stress level, approximately follows the two-parameter Weibull distribution, with statistical corelation coefficient values exceeding 0.90. The fatigue strength prediction model, representing S-N relationship, has been examined and the material coefficients have been obtained for GFRPCC containing 0.5% and 1.0% glass fibres. Design fatigue lives for GFRPCC containing different contents of glass fibres have been estimated for acceptable probabilities of failure and compared with those of PCC.
Highlights
Polymer concrete composites (PCC) have been in use in the domain of civil engineering since the 1960s for various applications
Recent studies on machine tools having bases made of PCC and glass fibre reinforced polymer concrete composite (GFRPCC) have concluded that components manufactured on these have better surface finish and tolerance when compared to those with cast iron bases [1,2,3]
Flexural fatigue tests were conducted to obtain the fatigue lives of PCC and GFRPCC at different stress levels
Summary
Polymer concrete composites (PCC) have been in use in the domain of civil engineering since the 1960s for various applications. Various fatigue strength prediction models have been proposed to predict the fatigue-life of composite materials Most of these models provide relationship between applied stress level and number of cycles to failure [9, 11]. A number of studies on fibre reinforced polymer concrete composites (FRPCC) cite improvement in mechanical properties due to addition of fibres [15,16,17,18,19]. All of these studies have reported only the behaviour of PCC and FRPCC under statically applied loads. The results reported here on fatigue of PCC and GFRPCC are a part of this larger investigation
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