期刊
COMPOSITE STRUCTURES
卷 161, 期 -, 页码 384-392出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.compstruct.2016.11.060
关键词
z-Reinforcements; Surface properties; Mechanical properties; Polymer-matrix composites (PMC)
资金
- Federal Ministry of Education and Research, Germany, (BMBF) within TransHybrid project
A testing method is presented to determine the pull-out behavior of interleaving metallic z-reinforcements for carbon fiber reinforced polymer (CFRP) laminates and joints. Energy absorbing mechanisms are described with respect to the metallic materials and means of surface pretreatment applied. Mechanical, wet-chemical and physical pretreatments result in milli-, micro- and nanoscaled oxide morphologies of titanium and stainless steel surfaces. Both, a high macro roughness of the reinforcement surface and a low difference in thermal expansion with regard to the surrounding CFRP is clearly proven to feature the highest level of energy absorption during pull-out tests. Surface analyses through scanning electron microscopy (SEM) and X-ray photoelectron spectroscopy (XPS) indicate laser-induced nanostructure's scale and morphology to provide good adhesion properties but not to allow macroscopic friction between metal surface and epoxy resin. (C) 2016 Elsevier Ltd. All rights reserved.
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