Guided bending experiment for the characterisation of CFRP in VHCF-loading. (September 2016)

• Record Type: Journal Article
• Authors: Koch, I.; Just, G.; Koschichow, R.; Hanke, U.; Gude, M.
• Is Part Of: Polymer testing. Volume 54(2016:Sep.)
• Page Start: 12
• Page End: 18
• Publication Date: 2016-09
• Subjects: Very high cycle fatigue -- Carbon fibre reinforced composites -- Shaker -- Bending test; Polymers -- Testing -- Periodicals; Polymères -- Tests -- Périodiques; 620.1920287
• DOI: 10.1016/j.polymertesting.2016.06.019
• Languages: English
• ISSNs: 0142-9418

Abstract

Abstract: The effective experimental characterisation of the damage and failure behaviour of polymer based composites under VHCF-loading depends directly on the development of reliable accelerated fatigue test methods. Here, a guided-bending fatigue experiment in forced excitation is proposed. Key requirements are: high frequency fatigue without significant warming of the specimen, homogeneous stress distribution, widely automated control and in situ crack determination. Using analytical and experimental investigations, a significant improvement of the test stand design, reported earlier [1] has been found in the form of a shaker based bending test stand with kinematically guided displacement. Improvements in the area of durability, homogeneity of the stress state, repeatability of the test and control have been achieved.