Breakage of wet flexible fiber agglomerates impacting a plane

Breakage of wet flexible fiber agglomerates impacting a plane
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湿柔性纤维团块撞击飞机时破裂

DOI:
10.1002/aic.16626
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发表时间:
2019-08
期刊:
影响因子:
3.7
通讯作者:
Jennifer S Curtis
Jennifer S Curtis
中科院分区:
工程技术3区
文献类型:
--
作者:
Jiecheng Yang;Liliana Bello;Kevin Buettner;Yu Guo;Carl Wassgren;Jennifer S Curtis

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对湿纤维团块撞击平面时的断裂进行了计算。本文采用离散元法进行了研究。在凝聚中,。纤维由于液体桥的凝聚力而粘在一起。结块。不同冲击条件下的断裂,初始结构,纤维特性,和。系统地研究了液体桥的性质。断裂的程度是由冲击能、液体桥的凝聚能、能量决定的。通过纤维接触和纤维变形的耗散/吸收;凝聚体内部力传递的效率。更具体地说,破损。增大冲击速度,减小团聚体粒度,增大。初始压实,增加纤维弯曲模量,降低液体表面张力。液固体积比减小。破损是强烈依赖的。在修正韦伯数上,即韦伯数与无因次破裂距离之比,它是相对于物体的冲击能量的度量。凝聚力的能量。
The breakage of an agglomerate of wet flexible fibers impacting a plane is computationally.investigated in this work using the discrete element method. In the agglomerate,.the fibers stick together due to cohesive liquid bridge forces. Agglomerate.breakage with various impact conditions, initial configurations, fiber properties, and.liquid bridge properties is systematically investigated. The degree of breakage is.governed by the impact energy, the cohesion energy due to liquid bridges, the energy.dissipation/absorption through fiber–fiber contacts and fiber deformation, and the.efficiency of force transmission within the agglomerate. More specifically, breakage.is promoted by increasing impact velocity, decreasing agglomerate size, increasing.initial compaction, increasing fiber bending modulus, decreasing liquid surface tension,.and decreasing liquid-to-solid volume ratio. Breakage is strongly dependent.on the modified Weber number, that is, the ratio of the Weber number to a dimensionless.rupture distance, which is a measure of the impact energy relative to the.cohesion energy.
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