Thermomechanical characterization and development of SMA embedded CFRP composites with self-damage control

Byungkoog Jang, Ya Xu, Ryutaro Oishi, Hideki Nagai, Hitoshi Yoshida, Yoshio Akimune, Kazuhiro Otsuka, Teruo Kishi

Research output: Contribution to journalArticle

4 Citations (Scopus)

Abstract

The focus of this work is the thermomechanical characterization and effect of damage recovery on the pre-strained SMA wire embedded CFRP composites for developing the smart composites with self-damage control. The SMA utilized in this work is a Ni-45at%Ti wire with a diameter of 0.4 mm. A steel mold was specially designed to embed the pre-strained TiNi wire into CFRP preperg and prevent their recovery during the cure cycle. TiNi/CFRP composites were fabricated by hot-pressing in the temperature range of 150-180°C by controlling the applied pressure. The overall research is divided into four parts: fabrication of SMA wire embedded CFRP composites, experimental characterization of thermomechanical behavior on SMA wire by electrical heating, recovery effect of self-damage control in composites and sensing effect by detecting the electrical resistance at SMA wire. Compressive recovery force induced by thermomechanical actuation of SMA depends on pre-strained level and volume fraction of TiNi. The hot-pressed TiNi/CFRP specimens were loaded under tensile test in order to induce a transverse crack or partial damage. Specially, transverse crack easily happen at 90° stacking CFRP layers. The damage degree due to generation of transverse cracks is quantified by real-time measurements of electrical resistance of SMA in composites during tensile load. After electrical heating, the generated transverse cracks at composites successfully repaired due to compressive force introduced by pre-strained TiNi wires and resulting in the self-damage recovery effect.

Original languageEnglish
Pages (from-to)182-190
Number of pages9
JournalProceedings of SPIE-The International Society for Optical Engineering
Volume4699
DOIs
Publication statusPublished - Jan 1 2002

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carbon fiber reinforced plastics
spectral mixture analysis
Carbon fiber reinforced plastics
Damage
Composite
wire
Wire
damage
composite materials
Recovery
Composite materials
recovery
Crack
Transverse
cracks
Cracks
Acoustic impedance
electrical resistance
Heating
heating

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Computer Science Applications
  • Applied Mathematics
  • Electrical and Electronic Engineering

Cite this

Thermomechanical characterization and development of SMA embedded CFRP composites with self-damage control. / Jang, Byungkoog; Xu, Ya; Oishi, Ryutaro; Nagai, Hideki; Yoshida, Hitoshi; Akimune, Yoshio; Otsuka, Kazuhiro; Kishi, Teruo.

In: Proceedings of SPIE-The International Society for Optical Engineering, Vol. 4699, 01.01.2002, p. 182-190.

Research output: Contribution to journalArticle

Jang, Byungkoog ; Xu, Ya ; Oishi, Ryutaro ; Nagai, Hideki ; Yoshida, Hitoshi ; Akimune, Yoshio ; Otsuka, Kazuhiro ; Kishi, Teruo. / Thermomechanical characterization and development of SMA embedded CFRP composites with self-damage control. In: Proceedings of SPIE-The International Society for Optical Engineering. 2002 ; Vol. 4699. pp. 182-190.
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