Investigation on Resistance Change in Carbon Fiber Reinforced Polymer to Detect Crack Damage on Its Structure in Structural Health Monitoring
I Nyoman Adhywinaya, Bentang Arief Budiman, Poetro Lebdo Sambegoro, Ignatius Pulung Nurprasetio

Faculty of Mechanical and Aerospace Engineering, Institut Teknologi Bandung, Ganesha Street No. 10, Bandung, 40132, Indonesia
National Center for Sustainable Transportation Technology, Institut Teknologi Bandung, Indonesia

Abstract

Carbon Fiber Reinforced Polymer (CFRP) is one of the most widely used composite materials due to its excellent properties. Although CFRP composites have attractive mechanical properties, these materials are notch sensitive and lose much of their structural integrity when damaged. One of the damages that is frequently found in the CFRP structure is crack damage. In structural health monitoring (SHM) technology, detection of crack that occurs in the composite material is very critical. Apparently, CFRP has piezoresistive properties which make it able to conduct electrical current. The resistance of the CFRP may change when the crack damage occurs in its surface. In this paper, the crack is ensured to be detected using the resistance change behavior of the CFRP. The crack in the specimen made from CFRP is generated in three different orientation and the respective resistance change is evaluated. The focus of this paper is to get the relationship between the crack length and orientation with the resistance change respond. The evaluation from this work can also utilized for the development in SHM technology.

Keywords: CFRP, electrical resistance, crack, SHM

Topic: Mechanical Engineering