Title: New Method of Interfacial and Micro-damage Sensing of Composites Via Pencil Lead Drawing Paper Sensor (PLDPS) and Electrical Resistance (ER) Mapping
Authors: Joung-Man Park, Ha-Seung Park, Pyeong-Su Shin, Jong-Hyun Kim, Yeong-Min Baek, and Lawrence K. DeVries
Abstract: The pencil drawing paper sensor (PLDPS) is a flexible and wearable sensing device. A new concept sensor offers tremendous potential feasibility for a variety of applications. It is highly responsive, sensitive, low cost, easily handles pencil lead-graphite on paper and can be made from cellulose pulp fibers extracted from wood, rags or grass, which are inexpensive, nature-friendly materials. Sensing effects, on 3 different papers (Plane, Hwasun, and Han papers) based on the properties of PLDPS, were compared using FT-IR, tensile tests, optical observations and electrical resistance (ER). Interfacial and mechanical properties of epoxy and GF/epoxy composites were evaluated by damage sensing and ER mapping using PLDPS during impact, flexural, and interlaminar shear strength (ILSS) testing. Plane paper was found to the optimal type of paper for use as the adherend for the pencil sensor. Glass fiber (GF)/epoxy composites were severely damaged, and as a result large ER changes of the PLDPS were observed.
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Conference: SAMPE 2019 - Charlotte, NC
Publication Date: 2019/05/20
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