دورية أكاديمية
The roles of impact and inertia in the failure of a shoelace knot.
| العنوان: | The roles of impact and inertia in the failure of a shoelace knot. |
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| المؤلفون: | Daily-Diamond CA; Department of Mechanical Engineering, University of California at Berkeley, Berkeley, CA 94720-1740, USA., Gregg CE; Department of Mechanical Engineering, University of California at Berkeley, Berkeley, CA 94720-1740, USA., O'Reilly OM; Department of Mechanical Engineering, University of California at Berkeley, Berkeley, CA 94720-1740, USA. |
| المصدر: | Proceedings. Mathematical, physical, and engineering sciences [Proc Math Phys Eng Sci] 2017 Apr; Vol. 473 (2200), pp. 20160770. Date of Electronic Publication: 2017 Apr 12. |
| نوع المنشور: | Journal Article |
| اللغة: | English |
| بيانات الدورية: | Publisher: The Society Country of Publication: England NLM ID: 9891746 Publication Model: Print-Electronic Cited Medium: Print ISSN: 1364-5021 (Print) Linking ISSN: 13645021 NLM ISO Abbreviation: Proc Math Phys Eng Sci Subsets: PubMed not MEDLINE |
| أسماء مطبوعة: | Original Publication: London : The Society, c1996- |
| مستخلص: | The accidental untying of a shoelace while walking often occurs without warning. In this paper, we discuss the series of events that lead to a shoelace knot becoming untied. First, the repeated impact of the shoe on the floor during walking serves to loosen the knot. Then, the whipping motions of the free ends of the laces caused by the leg swing produce slipping of the laces. This leads to eventual runaway untangling of the knot. As demonstrated using slow-motion video footage and a series of experiments, the failure of the knot happens in a matter of seconds, often without warning, and is catastrophic. The controlled experiments showed that increasing inertial effects of the swinging laces leads to increased rate of knot untying, that the directions of the impact and swing influence the rate of failure, and that the knot structure has a profound influence on a knot's tendency to untie under cyclic impact loading. Competing Interests: The authors have no competing interests. |
| التعليقات: | Comment in: Nature. 2017 Apr 12;544(7650):279. (PMID: 28426016) |
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| فهرسة مساهمة: | Keywords: impact; knots; shoelaces |
| سلسلة جزيئية: | figshare 10.6084/m9.figshare.c.3738116 |
| تواريخ الأحداث: | Date Created: 20170510 Latest Revision: 20201001 |
| رمز التحديث: | 20221213 |
| مُعرف محوري في PubMed: | PMC5415684 |
| DOI: | 10.1098/rspa.2016.0770 |
| PMID: | 28484324 |
| قاعدة البيانات: | MEDLINE |
| تدمد: | 1364-5021 |
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| DOI: | 10.1098/rspa.2016.0770 |