TY - GEN
T1 - Carbon Fiber-Based Structural Electric Capacitors
T2 - 15th Biennial International Conference on Engineering, Science, Construction, and Operations in Challenging Environments, Earth and Space 2016
AU - Shen, Zhenglai
AU - Zhou, Hongyu
N1 - Publisher Copyright:
© 2016 American Society of Civil Engineers.
PY - 2016
Y1 - 2016
N2 - This paper studies the coupled mechanical and electrical behaviors of carbon fiber-based structural electric capacitors (CSEC) materials, in particular the effects of interlaminar damage on both mechanical and electrical performances of the material. CSEC specimens with three different dielectric materials (i.e., trilayer PP-PET-PP, PETE, and LTX films) and four layup configurations were fabricated and tested to failure. The mechanical and electrical properties of material were measured concurrently and the results were compared to conventional carbon fiber reinforced polymer (CFRP) composites. It was found that the load bearing capacity of CSEC materials is, in general, lower than their CFRP counterparts, and it varies as a function of the dielectric material type. The lower load bearing capacity of CSEC is mainly due to interlaminar damage, which also leads to capacitance deterioration as mechanical load. The interlaminar damage initiates at early-stage of loading (i.e, 30-40% of the peak stresses), accompanied by capacitance decay. Both the mechanical and electrical properties of CSEC are functions of the dielectric material type and layup configuration. In general, thinner dielectric films will lead to higher nominal stiffness/strength and higher initial capacitance. On the other hand, the materials' ability to retain electrical capacitance under mechanical loading is primarily related to the interfacial fracture toughness, GIc, between dielectric materials and the matrix polymer.
AB - This paper studies the coupled mechanical and electrical behaviors of carbon fiber-based structural electric capacitors (CSEC) materials, in particular the effects of interlaminar damage on both mechanical and electrical performances of the material. CSEC specimens with three different dielectric materials (i.e., trilayer PP-PET-PP, PETE, and LTX films) and four layup configurations were fabricated and tested to failure. The mechanical and electrical properties of material were measured concurrently and the results were compared to conventional carbon fiber reinforced polymer (CFRP) composites. It was found that the load bearing capacity of CSEC materials is, in general, lower than their CFRP counterparts, and it varies as a function of the dielectric material type. The lower load bearing capacity of CSEC is mainly due to interlaminar damage, which also leads to capacitance deterioration as mechanical load. The interlaminar damage initiates at early-stage of loading (i.e, 30-40% of the peak stresses), accompanied by capacitance decay. Both the mechanical and electrical properties of CSEC are functions of the dielectric material type and layup configuration. In general, thinner dielectric films will lead to higher nominal stiffness/strength and higher initial capacitance. On the other hand, the materials' ability to retain electrical capacitance under mechanical loading is primarily related to the interfacial fracture toughness, GIc, between dielectric materials and the matrix polymer.
UR - http://www.scopus.com/inward/record.url?scp=85025691052&partnerID=8YFLogxK
U2 - 10.1061/9780784479971.073
DO - 10.1061/9780784479971.073
M3 - Conference contribution
AN - SCOPUS:85025691052
T3 - Earth and Space 2016: Engineering for Extreme Environments - Proceedings of the 15th Biennial International Conference on Engineering, Science, Construction, and Operations in Challenging Environments
SP - 787
EP - 796
BT - Earth and Space 2016
A2 - Malla, Ramesh B.
A2 - Agui, Juan H.
A2 - van Susante, Paul J.
PB - American Society of Civil Engineers (ASCE)
Y2 - 11 April 2016 through 15 April 2016
ER -