Stretchable and fatigue-resistant materials

Xiang，Chunping1,2; Wang，Zhengjin1,2; Yang，Canhui2,3; Yao，Xi2,4; Wang，Yecheng2; Suo，Zhigang2

2019

10.1016/j.mattod.2019.08.009

Materials Today   影响因子和分区

1369-7021

1873-4103

In developing a material for a load-bearing application, attention inevitably falls on the resistance of the material to the growth of a crack, characterized by toughness under monotonic load, and by threshold under cyclic load. Many methods have been discovered to enhance toughness, but they do not enhance threshold. For example, stretch-induced crystallization and inorganic fillers have made the toughness of natural rubber well above 10000 J/m, but have left the threshold of natural rubber around 50 J/m. Here we describe a principle of stretchable and fatigue-resistant materials. To illustrate the principle, we embed unidirectional fibers of a soft and stretchable material in a matrix of a much softer and much more stretchable material, and adhere the fibers and the matrix by sparse and covalent interlinks. When the composite is cut with a crack and subject to a load, the soft matrix shears readily and delocalizes the high stretch of a fiber over a long segment. A threshold of 1290 J/m is reached, below which the composite does not suffer any mode of failure (fiber break, kink crack, or matrix fracture). The principle of stretchable and fatigue-resistant materials is applicable to various materials, layouts, and methods of fabrication, opening an enormous design space for general applications.

SCI ; EI

英语

其他

MRSEC[DMR-14-20570]

Materials Science

Materials Science, Multidisciplinary

WOS:000531095800009

ELSEVIER SCI LTD

20193907467506

Fatigue of materials ; Fibers ; Rubber

Natural Rubber:818.1 ; Materials Science:951

2-s2.0-85072518017

Scopus

1.State Key Laboratory for Strength and Vibration of Mechanical StructuresSchool of Aerospace EngineeringXi'an Jiaotong University,Xi'an,710049,China
2.John A. Paulson School of Engineering and Applied SciencesKavli Institute for Bionano Science and TechnologyHarvard University,Cambridge,02138,United States
3.Department of Mechanics and Aerospace EngineeringSouthern University of Science and Technology,Shenzhen,518055,China
4.Key Lab for Special Functional Materials of Ministry of EducationHenan University,Kaifeng,475004,China

Xiang，Chunping,Wang，Zhengjin,Yang，Canhui,et al. Stretchable and fatigue-resistant materials[J]. Materials Today,2019,34:7-16.

Xiang，Chunping,Wang，Zhengjin,Yang，Canhui,Yao，Xi,Wang，Yecheng,&Suo，Zhigang.(2019).Stretchable and fatigue-resistant materials.Materials Today,34,7-16.

Xiang，Chunping,et al."Stretchable and fatigue-resistant materials".Materials Today 34(2019):7-16.