Investigation on Strength Reduction in Carbon Fiber Reinforced Polymer Due to Contact Resistance Measurement and Its Prospect in Structural Health Monitoring

• Main Author: Tania Utami, Sarah
• Format: Final Project
• Language: Indonesia
• Online Access: https://digilib.itb.ac.id/gdl/view/43558
• Institution: Institut Teknologi Bandung

Composite materials used in military aviation are given high requirements to support its function, not only mechanical, but thermal, chemical, and often even ballistic as well. Because of the dangerous usage of fighter jets, the security of the jets needs to be very high, including the security of the structure. There are many ways to improve structural security. One way is to apply structural health monitoring. Structural health monitoring is the process of damage detection strategy. The process starts from the observation of structure, then the extraction and analysis of features until appropriate repair, rehabilitate, and/or strengthening of the structure are decided to prolong these structures lives. CFRP is a material that has piezoresistive properties, that is, a property in which electrical resistance will change if the object is given mechanical strain. CFRP is a material commonly used in industries such as the aerospace, automotive and civil engineering industries. Structural health monitoring can be carried out on CFRP by measuring resistance to CFRP. To do resistance measurements, the material needs to be sanded so that it can be attached to the electrode. In this study, the effect of the polishing process on contact resistance and strength of CFRP, both with unidirectional fiber and plain woven fiber, are tested. The tensile test is carried out by testing three specimens for each type of treatment, and one specimen for each type of treatment for the contact resistance test. Based on the results of these tests, it was found that CFRP contact was reduced with the reduced surface roughness of the material. In addition, sandpaper was found to have no significant effect on the material.