Use of micro-tomography for validation of method to identify interfacial shear strength from tensile tests of short regenerated cellulose fibre composites

37th Risø International Symposium on Materials Science

Hajlane, A.^1 ; Miettinen, A.^2 ; Madsen, B.^3 ; Beauson, J.^3 ; Joffe, R.^1

Luleå University of Technology, Department of Engineering Sciences and Mathematics, Luleå

SE-971 87, Sweden^1

University of Jyvaskyla, Department of Physics, P.O. Box 35 (YFL), Jyvaskyla

FI-40014, Finland^2

Technical University of Denmark, Department of Wind Energy, Risø Campus, Frederiksborgvej 399, Roskilde

4000, Denmark^3

关键词: Interfacial shear strength;    Micro-mechanical modeling;    Micro-tomography;    Orientation distributions;    Parameters characterizing;    Regenerated cellulose;    Surface treated;    Weight content;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/139/1/012021/pdf
DOI  :  10.1088/1757-899X/139/1/012021

来源: IOP

【 摘 要 】

The interfacial shear strength of short regenerated cellulose fibre/polylactide composites was characterized by means of an industry-friendly adhesion test method. The interfacial shear strength was back-calculated from the experimental tensile stress-strain curves of composites by using a micro-mechanical model. The parameters characterizing the microstructure of the composites, e.g. fibre length and orientation distributions, used as input in the model were obtained by micro-tomography. The investigation was carried out on composites with untreated and surface treated fibres with various fibre weight contents (5wt%, 10wt%, and 15wt% for untreated fibres, and 15wt% for treated fibres). The properties of fibres were measured by an automated single fibre tensile test method. Based on these results, the efficiency of the fibre treatment to improve fibre/matrix adhesion is evaluated, and the applicability of the method to measure the interfacial shear strength is discussed. The results are compared with data from previous work, and with other results from the literature.