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Experimentelle Charakterisierung von Verbunden und mittels Gewebelagen reparierter Platten im Kerbschlagversuch
Author(s) -
Khalili S. M. R.,
Nooramin A. S.,
Shiravi M.
Publication year - 2009
Publication title -
materialwissenschaft und werkstofftechnik
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.285
H-Index - 38
eISSN - 1521-4052
pISSN - 0933-5137
DOI - 10.1002/mawe.200900427
Subject(s) - kevlar , charpy impact test , materials science , composite material , composite number , enhanced data rates for gsm evolution , toughness , telecommunications , computer science
Abstract In this study, edge‐cracked steel plates repaired on two‐sides with composite as well as smart composite patches were investigated experimentally for their response to Charpy impact test. Woven glass and Kevlar fibres were used for composite patches. Each patch was made by two layers. The crack length was kept constant for all the specimens. The types of patches were selected according to different combination of glass and/or Kevlar fibres for maximum energy absorption. Kevlar fibre composite patches showed better energy absorption. This configuration was then reinforced by shape memory alloy (SMA) wires. For fabrication of smart patches, nickel‐titanium (Ni‐Ti) wires were embedded in the Kevlar fibre composites. The SMA wires in the patches were used in 3 different temperatures or pre‐stress states. The patch of Kevlar fibre reinforced by Ni‐Ti wires treated by combination of pre‐load and temperature states showed better results than all other smart patches in Charpy impact test.