Abstract

In this paper, three kinds of warp knitted spacer fabrics (WKSFs) with different thickness were superposed in different ways. Furthermore, the multi-layer WKSFs were treated by hot-melting nonwovens. The aim of the study is to compare the compressive characteristics of multi-layer WKSFs with different lamination methods and various interfaces conditions. The results show that the compressive stress-strain curves have a tendency during single flat plate compression, which could be divided into three stages: linear compression stage, yield stage and crushing stage. Due to the influence of the number of layers, the yield stage also could be divided into three small stages. While the stress-strain curves of some WKSFs treated with hot-melting nonwovens are slightly different from those of untreated WKSFs. In the fatigue compression test, all multi-layer WKSFs directly transition from the linear compression stage to the crushing stage. Compared with multi-layer WKSFs untreated, multi-layer WKSFs treated with hot-melting nonwovens have less deformation under the same load. In addition, the energy absorbed by WKSFs and the compressive resilience would be increased with the increase of the first layer thickness of the multi-layer WKSF.

摘要

本文将三种不同厚度的经编间隔织物（WKSFs）以不同方式叠加。此外，多层 WKSFs 用热熔无纺布处理。该研究的目的是比较多层 WKSFs 在不同层压方法和各种界面条件下的压缩特性。结果表明，单板受压过程中，压应力-应变曲线有一定的趋势，可分为线性压缩阶段、屈服阶段和破碎阶段三个阶段。由于层数的影响，屈服阶段也可以分为三个小阶段。而一些用热熔无纺布处理的WKSFs的应力-应变曲线与未经处理的WKSFs略有不同。在疲劳压缩试验中，所有多层 WKSF 直接从线性压缩阶段过渡到破碎阶段。与未处理的多层WKSFs相比，经热熔无纺布处理的多层WKSFs在相同载荷下变形较小。此外，随着多层 WKSF 第一层厚度的增加，WKSFs 吸收的能量和压缩回弹性将增加。