期刊
POLYMER COMPOSITES
卷 42, 期 6, 页码 3038-3050出版社
WILEY
DOI: 10.1002/pc.26037
关键词
compression; creep; fiber; relaxation; viscoelastic properties
资金
- National Natural Science Foundation of China [11972154, 51805141, 51875188]
An experimentally verified viscoelastic model was proposed to describe the stress and strain responses of fabric in the compaction process, taking into account the effects of added binder and elevated temperature. The model showed that with increasing temperature, the interaction among fibers enhanced, leading to an increase in elastic modulus and a decrease in strain.
The strain response and influence of elevated temperature on the viscoelastic behavior of fabric in the compaction process cannot be described and predicted by current viscoelastic models. Here, a viscoelastic model, verified by compaction experiments, is originally proposed to depict the stress and strain responses in different stages of the compaction, especially considering the effects of added binder and elevated temperature. The model effectively captures that with the rising temperature, the interaction among fibers is enhanced due to the fiber volume expansion. Accordingly, the elastic modulus is enlarged in the compression stage. In the relaxation stage, the interaction suppresses the fiber realignment, leading to the reduction of stress relaxation. In the creep stage, the elevated temperature increases the deformation stiffness, indicating the strain is declined. In the relaxation stage, the adhesive effect of added binder facilitates the stress relaxation, and then the increasing stress relaxation promotes the increment of strain in the creep stage.
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