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This paper deals with two possibilities, which enable the investigation of the machining quality of parts made of fibre reinforced polymers. Finishing operations like milling or drilling are necessary in actual production processes. Such operations mostly cause damages like fraying, delamination or splintering at the machining surface. The one dimensional maximum method and the three dimensional damage analysis are two tools, which allow a reliable comparison between different experiments with, for example, varied process parameters. Therefore the one dimensional maximum method (1D-MM) only needs a calliper or microscope with measuring feature and can be accomplished in nearly every environment. The three dimensional damage analysis (3D-DA) requires high end measuring equipment but provides more information. Both procedures distinguish the occurring damages in fraying, delamination and splintering, what enables the optimized enhancement of the process. Such measurement methods are the necessary basis for every development or investigation in this field and should be understood as an approach for standardization. [ABSTRACT FROM AUTHOR]

The paper deals with the dynamic behaviour of CFRP leaf springs. The experimental modal analysis is used for the investigation. Therefore two different methods (impact test and shaker test) for the excitation of the parts have been applied. A standard steel spring is used as reference. Three different composite springs are investigated and compared. The composite design is calculated via classical lamination theory and the manufacturing was done by hand lay-up and autoclave. An important aspect for spring elements is the behaviour at different thermal conditions. Therefore one of the test bodies was investigated at low temperature. At last the suitability of the analytical calculation of the Euler – Bernoulli beam theory was investigated and compared with the experimental results. [ABSTRACT FROM AUTHOR]

Abstract: Multitude of repair schemes are currently available to retrofit damaged civil engineering structures. Among them, efficient and effective method of repairing damaged structures is the application of Fiber Reinforced Plastics (FRP) because of its distinct advantages over other techniques. In the past, several structures have been successfully rehabilitated using the FRP techniques. To quote some examples, a calcareous masonry bell tower building, about 30 m in height and 1,200 m in width with a rectangular plan was retrofitted with FRP. Pushover curves for the retrofitted and un-retrofitted structures presented have disclosed that FRP intervention enhanced the seismic capacity of the structure. In the case of repairing of underwater pre- stressed piles, corrosion rate measurements indicated that the performance of the wrapped piles is consistently better than that the unwrapped controls. The paper presents a review of using the FRP techniques, their applications, case studies of repairing civil engineering structures, and appropriate concluding remarks. [Copyright &y& Elsevier]