arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 1905.09220cond-mat.softphysics.app-ph
收藏

粘弹性薄板折叠中的松弛常数

A relaxation constant in the folding of thin viscoelastic sheets

Kasra Farain

摘要:

如果在施加的力的作用下折叠薄的粘弹性片材,则形成塑性形变线,该塑性变形线将片材成形为角度。我们确定的参数,定义这个角度的实验和表明,无论有多大的负载之一,它是不可能的,使角度小于一定的最小角度在一定的时间。此外,它表明,无论是自由释放后,或保持在负载下,对数松弛过程遵循的第一变形。该对数的斜率在两种条件下是相同的,并且既不取决于所施加的力也不取决于片的厚度,这表明它直接是材料的分子迁移率的探针。这种固有的弛豫常数测定为0.01和5.7的聚酯薄膜和纸张,分别。本文还建议,所观察到的最小折叠角可以定义为不同材料塑性的特征指标。

英文摘要:

If one folds a thin viscoelastic sheet under an applied force, a line of plastic deformation is formed which shapes the sheet into an angle. We determine the parameters that define this angle experimentally and show that, no matter how much load one applies, it is impossible to make angles less than a certain minimum angle in a definite time. Moreover, it is shown that regardless of whether the sheet is released freely afterward or kept under the load, a logarithmic relaxation process follows the first deformation. The slope of this logarithm is the same in both conditions and depends neither on the applied force nor on the thickness of the sheet, which indicates it is directly a probe of the molecular mobility of the material. This intrinsic relaxation constant was measured 0.01 and 5.7 for Mylar and paper sheets, respectively. It is also suggested that the observed minimum angle of folding can be defined as a characteristic index for the plasticity of different materials.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

↑