Impact Tensile Behaviors of PVDF Building Coated Fabrics

Lianqiong Zheng,Jinping Zhuang,Yilong Ye,Yongqian Zheng,Payam Shafigh

doi:10.1155/2020/1620760

Lianqiong Zheng, Jinping Zhuang + Show 3 more

Open Access

https://doi.org/10.1155/2020/1620760

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Abstract

The paper presents the impact tensile behaviors of two common building membranes (Ferrari 1002T2 membrane and XYD 300N membrane) in PVDF-coated-fabric membrane structures. The tests are conducted using the split Hopkinson bar test device. Typical forms of stress and strain are applied for comparing the stress-strain relationship between quasi-static and high strain rates. Besides, the failure mechanism and energy absorption at high strain rates are discussed. The results show that with the increase of strain rates, the growth rate of the stress of PVDF membrane decreases gradually, which is different from the stress-strain relationship in low strain rates. At high strain rates, the ultimate tensile strength increases linearly with the increase of strain rates. In addition, the energy absorption capacity of the material increases with the increase of strain rates. The results can provide an important basis for the design and analysis of membrane structures under the impact loads.

Highlights

As a new form of large-span spatial structures, membrane structures are often used in the construction of large public buildings such as stadiums and exhibition centers. e membrane structure is pretensioned to maintain the shape and bear the load [1]
Some researchers have done a lot of research on the failure mechanism and constitutive relationship of building membrane materials [7,8,9]
Some researchers have done a lot of research on the micro performance of PVDF membrane materials [10,11,12,13,14]

Summary

Introduction

As a new form of large-span spatial structures, membrane structures are often used in the construction of large public buildings such as stadiums and exhibition centers. e membrane structure is pretensioned to maintain the shape and bear the load [1]. Referring to the current research results, it can be found that the research on membrane structures mainly focuses on the mechanical properties and response analysis of materials and structures under quasi-static and the impact loads. As coated fabric composites, the mechanical properties of membrane materials under high strain rates are not clear, which is important for the response of membrane structures under impact. In order to deeply study the accurate response of membrane structures under wind-induced disasters, it is necessary to further study the mechanical properties of membrane materials under high strain rates and the impact resistance of membrane structures. Two common building membrane materials, Ferrari 1002T2 membrane and XYD 3000N membrane, are chosen as the research object. e stress-strain relationship between high strain rates and quasi-static is discussed, and the failure mechanism and energy absorption are studied. e variations of mechanical property parameters under different strain rates are analyzed, including ultimate strength, Young’s modulus, energy absorption, and so on. e results can provide an important basis for the design and analysis of membrane structures under the impact loads

Experimental Procedure

Results and Discussion

Stress-Strain Relations