Abstract
Structural biological materials with integrated soft and hard phases are ubiquitous in nature. Over recent decades, bio-inspired hard-soft-integrated materials (BHSIMs) have shown excellent mechanical properties of drag reduction and abrasion resistance. This work is proposed to investigate the friction behaviors of BHSIMs via theoretical modeling, numerical simulation and experimental verification. First, the mathematical model of the friction process was established based on the classic adhesive friction theory. Then, a range of factors in the friction process were examined by simulation and the respective friction coefficients were discussed. Subsequently bio-inspired materials with integrated soft and hard layers were prepared by 3D printing and their friction coefficients were measured by experiments, which had verified the results of theoretical analyses.
Highlights
Coatings 2021, 11, 1296. https://It is well known that structural biological materials are often of heterogeneous phases and hierarchical architectures, which afford outstanding mechanical performance to protect an organism against complex environments [1,2,3]
bio-inspired hard-soft-integrated materials (BHSIMs) here,here, we we describe it by two scalar parameters, modulus of soft phase) hard phase), which areare thethe loadload per modulus phase) and andEEh h(Young’s (Young’smodulus modulusofof hard phase), which unit surface per relative elongation/compression of the chain for pure soft and hard per unit surface per relative elongation/compression of the chain for pure soft hard phases
We have investigated the friction behaviors of bio-inspired hard-softIn this work, we have investigated the friction behaviors of bio-inspired hard-softintegrated materials (BHSIMs) via theoretical modeling, numerical simulation and experiintegrated materials (BHSIMs) via theoretical modeling, numerical simulation and expermental verification
Summary
It is well known that structural biological materials are often of heterogeneous phases and hierarchical architectures, which afford outstanding mechanical performance to protect an organism against complex environments [1,2,3]. One particular feature of these structural biomaterials, such as nacre, bones and skins, is the integration of periodic soft and hard layers, which widely exist in a vast array of invertebrates and vertebrates [4]. Snake skin exhibits a similar arrangement of relative stiff scale supported by a flexible layer [5,6]. It has been shown that biomaterials with integrated hard and soft phases are of exceptional mechanical properties beyond those of pure soft or hard phase, demonstrating a remarkable balance of stiffness, strength, fracture toughness, energy dissipation and wear resistance [7,8,9,10,11,12,13,14].
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