In this paper we study numerically and experimentally non-reversible deformation of anisotropic, semi-flexible fibre networks. We formulate a Discrete Element Model (DEM) with bonded particles to simulate uniaxial compression of such networks and use this model to describe and quantify the effect of elasto-plastic fibre contacts and fibre-fibre adhesion on non-reversible deformation. Our results show that inter-fibre adhesion plays a role for compression in a low solid volume fraction range where adhesive forces can overcome fibre deformation forces and moments. Also, elasto-plastic contacts between fibres become important at higher solid volume fractions when the yield criterion is exceeded. The combined case of fibres having elasto-plastic contacts and adhesion shows a significant synergetic effect leading to a degree of non-reversible deformation of the network far beyond that of networks with only elasto-plastic fibre contacts or inter-fibre adhesion.

在本文中，我们通过数值和实验研究了各向异性、半柔性纤维网络的不可逆变形。我们制定了一个离散元模型 (DEM) 与粘结粒子模拟这种网络的单轴压缩，并使用该模型来描述和量化弹塑性纤维接触和纤维 - 纤维粘附对不可逆变形的影响。我们的结果表明，纤维间粘附在低固体体积分数范围内对压缩起作用，其中粘附力可以克服纤维变形力和力矩。此外，当超过屈服标准时，纤维之间的弹塑性接触在较高的固体体积分数下变得重要。