Novel FBG probes for memorizing the maximum tensile strain of composite materials
In this paper, Two types of FBG (Fiber Bragg grating) sensor probes are designed to intermittently detect the maximum tensile strain of composite materials.One is fabricated by two thin aluminum films bonded to an FBG optical fiber, and two brackets, fixed on the surface of composite materials.The other probe is constructed with an FBG optical fiber packaged in silver epoxy.These probes are bonded on composite tensile specimens.By using universal material testing machine, these specimens were tested with the condition of repeated tensile loading.From the test results, it was concluded that detection Was possible, because the residual strain was readable.The strain ratio of the Al-packaged FBG probe was 0.23, and the strain ratio of the silver epoxy packaged FBG probe was 0.078.The strain sensitivity, which shows the residual strain due to the maximum strain, of the aluminum bonded FBG probe is higher than that of the silver epoxy packaged FBG probe.Therefore, it was confirmed that these novel FBG probes can be used to memorize the maximum strain of composite materials
aluminum film bonded FBG probe silver epoxy FBG probe the maximum tensile strain residual strain composite materials
I.B.Kwon J.Im
Center for Safety Measurements,Korea Research Institute of Standards and Science,Daejeon 305-340,South Korea
国际会议
南京
英文
42-45
2014-10-12（万方平台首次上网日期，不代表论文的发表时间）