1. Introduction
Cellular materials are commonly used as packaging and cladding
materials to protect products and personnel during collision
and impact events [1]. The mechanical characterization of those
cellular materials at varying strain rates is essential for their efficient
use in dynamic loading applications. As we approach the limit
of non-renewable natural resources, there is an increasingly urgent
need to find alternative materials that fulfil not only the mechanical
stability but also some integrated multi-functional properties with
low environmental impact and renewable source of reproduction
[2]. The fruits of Luffa Cylindrica (LC) have a netting-like fibrous
vascular system. When they are dried, the fibrous network structure
serves like an open cell foam material. In a recent research [3],
it has been proved that the luffa sponge is potential to be used as an
alternative sustainable material for various practical applications
such as packaging, acoustic and vibration isolation, and impact
energy absorption. The luffa sponge material can be derived from
fruit of the LC plant and has recycling capability and triggered
biodegradability [4,5]. The importance of the luffa sponge material
1. Introduction
Cellular materials are commonly used as packaging and cladding
materials to protect products and personnel during collision
and impact events [1]. The mechanical characterization of those
cellular materials at varying strain rates is essential for their efficient
use in dynamic loading applications. As we approach the limit
of non-renewable natural resources, there is an increasingly urgent
need to find alternative materials that fulfil not only the mechanical
stability but also some integrated multi-functional properties with
low environmental impact and renewable source of reproduction
[2]. The fruits of Luffa Cylindrica (LC) have a netting-like fibrous
vascular system. When they are dried, the fibrous network structure
serves like an open cell foam material. In a recent research [3],
it has been proved that the luffa sponge is potential to be used as an
alternative sustainable material for various practical applications
such as packaging, acoustic and vibration isolation, and impact
energy absorption. The luffa sponge material can be derived from
fruit of the LC plant and has recycling capability and triggered
biodegradability [4,5]. The importance of the luffa sponge material
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