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Flex Fatigue Behavior Of Plastic Optical Fibers With Low Bending Cycles

Huang J., Křemenáková D., Militký J.

Autex Research Journal

2015

Vol. 15, no. 2

112--115

Flex fatigue behaviour of plastic optical fibres (POFs) with the diameters of 0.2 and 0.3 mm under different pretensions is measured with fatigue life curve by flexometer. The fatigue sensitivity coefficient is calculated by the linear fitting curve of normalised stress versus logarithm of bending cycles. The residual modulus is investigated during the flex fatigue processes. The results exhibit the exponential relationship between applied pretension and numbers of bending cycles at break. It is indicated that the flex fatigue of POFs might be sensitive with high swing angle or swing speed. There is an evident loss of modulus for two POFs with pretensions of 4 and 10% of ultimate tensile strength during 10-times bending cycles. The values of residual modulus of two POFs almost keep constant after 10-times bending cycles.

Analysis of main propulsion engine seating in ship power plants

Piaseczny L.

Journal of Polish CIMAC

2010

Vol. 5, no 1

135-142

In the circumstances of information gap from the manufacturer of engines mounted in ship power plants about the tension of foundation bolts resulting from normal engine work in ship operation, the author resolved to check on ships constructed in Poland how the applied pre-tensions of foundation bolts relate to different parameters of engines. On the basis of research and control calculations of the seating of main propulsion engine series MAN B&W type L35MC on foundations it was shown that the number and tension of foundation bolts are directly proportional to the weight of seated engine.

Roszczenie negatoryjne

Radecki W.

Zieleń Miejska

2008

Nr 4

64-65

W kodeksie cywilnym problematyka ochrony zieleni, drzew i krzewów zawiera się w roszczeniu o zaniechanie naruszania własności, jeżeli to naruszenie nie polega na pozbawianiu właściciela faktycznego władztwa nad rzeczą.