Compressive mechanical properties of metal fiber sintered sheets at different strain rates

Liu, G., Song, W. and Li, P. (2020) Compressive mechanical properties of metal fiber sintered sheets at different strain rates. Composite Structures, 233, 111703. (doi: 10.1016/j.compstruct.2019.111703)

Abstract

The quasi-static and dynamic mechanical behaviors of metal fiber sintered sheets (MFSSs) with six relative densities and three fiber diameters at the strain rates ranging from 0.001/s to 2000/s are investigated by using Universal Materials Testing System and split Hopkinson pressure bar (SHPB) system. The effects of relative density, strain rate on the yield strength and the energy absorption efficiency of MFSSs are evaluated. Finite element models (FEM) based on computed tomography (CT) images and idealized fiber networks are developed to simulate the compressive behavior at different strain rates. The measured responses of MFSSs are generally in agreement with that predicted by the 3D reconstructed model and the idealized model. Two deformation modes of MFSSs are explored based on stress wave theory and a critical speed is calculated to differentiate the two modes. Finally, an idealized lapping network is proposed to explore the compatibility condition of the geometrical characteristics and the effect of the strain rate and relative density on the mechanical behavior MFSSs.

• Item Type: Articles
• Additional Information: The author acknowledges the financial support of the National Key R&D Program of China (2016YFC0801200), the National Natural Science Foundation of China (11672043, 11732003, 11802028), the Opening Project of State Key Laboratory for Strength and Vibration of Mechanical Structures (SV2019-KF-02), the Opening Project of State Key Laboratory of Traction Power (TPL1701), Project funded by China Postdoctoral Science Foundation (2018 M640072), the Project of State Key Laboratory of Explosion Science and Technology (YBKT18-07, KFJJ19-12 M) and other projects of China (614260601010617 and SAST2017-029).
• Status: Published
• Refereed: Yes
• Glasgow Author(s) Enlighten ID: Li, Dr Peifeng
• Authors: Liu, G., Song, W., and Li, P.
• College/School: College of Science and Engineering > School of Engineering > Systems Power and Energy
• Journal Name: Composite Structures
• Publisher: Elsevier
• ISSN: 0263-8223
• ISSN (Online): 1879-1085
• Published Online: 22 November 2019
• Copyright Holders: Copyright © 2019 Elsevier Ltd.
• First Published: First published in Composite Structures 233:111703
• Publisher Policy: Reproduced in accordance with the copyright policy of the publisher