Dynamic cushion, quasi-static stab resistance, and acoustic absorption analyses of flexible multifunctional inter-/intra-bonded sandwich-structured composites

Abstract

This study proposes flexible multifunctional sandwich-structured composites that are reinforced by using aramid staple fibers and a needle-punching process and measures their cushion performance using a self-made drop-tower machine with a realistic depth sensor. The Mechanical properties of the laminated nonwoven composites are evaluated to examine the influence of the content of aramid staple fibers. Moreover, the puncture resistance rises linearly with the increasing aramid content. When the aramid content is 15%, the laminated nonwoven composites can bear 60.34% of dynamic impact force and have the maximum burst load of 1798.5 N, the maximum puncture resistance of 320.1 N, the maximum stab resistance of 191.9 N, the maximum sound absorption coefficient of 0.99, and NRC of 0.41. Therefore, aramid staple fibers are good candidate to be used as improvement in cushioning, stab resistant, and sound-absorbent properties of security walls.

Keywords:

• Dynamic cushion
• stab resistance
• acoustic absorption
• laminated composites

Disclosure statement

No potential conflict of interest was reported by the authors.

Additional information

Funding

The authors gratefully acknowledge the financial support provided by the National Natural Science Foundation of China [grant numbers 51503145 and 11702187], the Natural Science Foundation of Fujian [2018J01504, 2018J01505], and the Open Project Program of Fujian Key Laboratory of Novel Functional Fibers and Materials (Minjiang University), China [nos. FKLTFM 1704 and FKLTFM1722]. This study is also supported by the Opening Project of Green Dyeing and Finishing Engineering Research Center of Fujian University [2017002B, 2017005B, and 2017001A] and the Natural Science Foundation of Tianjin.