%0 Publication %T Stress dependence of indentation modulus for carbon fiber in polymer composite %A Hongxin Wang; Han Zhang; Ikumu Watanabe; Kenta Goto; Hiroaki Mamiya; Daiming Tang; Daisuke Fujita; Masamichi Kawai; Hideaki Kitazawa %8 02/03/2023 %I Informa UK Limited %U https://mdr.nims.go.jp/concern/publications/s7526g78w %( https://doi.org/10.1080/14686996.2019.1600202 %X Elastic modulus measured through atomic force microscopy (AFM)-based indentation on single carbon fiber (CF) is found with dependence on lateral applied stress. An in situ indentation experiment inside a high-resolution transmission electron microscope was per- formed to quantitatively understand this phenomenon by observing microstructure change in the indented area. Change of graphitic basal plane misalignment angle during indentation was linked to a continuous change of modulus with the help of finite element simulation. The established relationship between modulus and indentation force was further used to calcu- late residual stress distribution in CF imbedded in a CF reinforced polymer composite using the AFM indentation technique. The stress-induced formation of nanoscale defects in the CF and their transformation into fracture were directly characterized. %G English %9 Article %K Atomic force microscopy; indentation %~ MDR: NIMS Materials Data Repository %W National Institute for Materials Science