Mechanical behavior of cross-linked random fiber networks with inter-fiber adhesion
Mechanical behavior of cross-linked random fiber networks with inter-fiber adhesion
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具有纤维间粘附力的交联随机纤维网络的机械行为
DOI：
10.1016/j.jmps.2018.09.027
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发表时间：
2018
影响因子：
5.3
通讯作者：
Negi, V
中科院分区：
文献类型：
--
作者：
Negi, V
本文研究了纤维间粘附力对二维交联无规纤维网络力学行为的影响。为此，我们考虑网络的连接数，z，低于，在，和以上的结构没有粘附力，zc的均衡极限。纤维以轴向和弯曲变形方式储存能量，交联为自由旋转型。粘合力导致纤维成束并导致网络的总体积减小。收缩程度作为粘合强度和网络参数的函数来确定。进一步研究了这些结构在单轴拉伸和压缩下的力学响应。无纤维间粘附的网络的应力-应变曲线表现出一个初始的线性政权，然后应变硬化拉伸和应变软化和应变局部化压缩。在存在粘附的情况下，响应变得更加复杂。初始线性状态持续存在，在z>zcandz<zc的情况下，有效模量分别随着粘附力的增加而减小和增加。线性区域的应变范围随着粘附力的增加而显著增加。z> zc的网络以取决于粘附强度的速率经受拉伸应变-应变，但最终进入大应变/应力状态，其中响应与该参数无关。z <z的网络在无负载状态下通过粘附稳定。超过初始线性状态，它们的切线模量逐渐减小，仅在大应变下再次增加。粘合剂相互作用导致压缩中的类似效应。具体地，在这种情况下，增加粘合强度降低了线性弹性模量，并显著增加了线性状态的范围，延迟了应变局部化。这第一次调查的力学交联随机网络与纤维间的粘附打开了大门，设计的软材料与新的性能。
We study the effect of inter-fiber adhesion on the mechanical behavior of cross-linked random fiber networks in two dimensions. To this end, we consider networks with connectivity number,z, below, at, and above the isostaticity limit of the structure without adhesion,zc. Fibers store energy in the axial and bending deformation mode and the cross-links are of freely rotating type. Adhesive forces lead to fiber bundling and to a reduction of the total volume of the network. The degree of shrinkage is determined as a function of the strength of adhesion and network parameters. The mechanical response of these structures is further studied in uniaxial tension and compression. The stress-strain curves of networks without inter-fiber adhesion exhibit an initial linear regime, followed by strain stiffening in tension and strain softening and strain localization in compression. In presence of adhesion, the response becomes more complex. The initial linear regime persists, with the effective modulus decreasing and increasing with increasing adhesion in cases withz>zcandz<zc, respectively. The strain range of the linear regime increases significantly with increasing adhesion. Networks withz>zcsubjected to tension strain-stiffen at rates that depend on the adhesion strength, but eventually enter a large strain/stress regime in which the response is independent of this parameter. Networks withz<zcare stabilized by adhesion in the unloaded state. Beyond the initial linear regime their tangent modulus gradually decreases, only to increase again at large strains. Adhesive interactions lead to similar effects in compression. Specifically, in thez>zccase, increasing the adhesion strength reduces the linear elastic modulus and significantly increases the range of the linear regime, delaying strain localization. This first investigation of the mechanics of cross-linked random networks with inter-fiber adhesion opens the door to the design of soft materials with novel properties.
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影响因子：
19
作者：
A. Linares;F. Vandevelde;J. Pantigny;A. Falcimaigne-Cordin;K. Haupt
通讯作者：
A. Linares;F. Vandevelde;J. Pantigny;A. Falcimaigne-Cordin;K. Haupt
影响因子：
2.6
作者：
Islam, M. R.;Picu, R. C.
通讯作者：
Picu, R. C.
DOI：
--
发表时间：
2013
期刊：
影响因子：
--
作者：
A. Shahsavari;R. C. Picu
通讯作者：
R. C. Picu
詹姆斯·克拉克·麦克斯韦的科学论文：关于力的倒数和图
影响因子：
0.5
作者：
J. Maxwell;W. Niven
通讯作者：
W. Niven
DOI：
10.1103/physreve.84.031904
发表时间：
2011
期刊：
Physical review. E, Statistical, nonlinear, and soft matter physics
影响因子：
--
作者：
R. C. Picu;G. Subramanian
通讯作者：
G. Subramanian