Chapter 24
Experiment Research on Tensile Process
of Type IV Gas Cylinder Liner-HDPE
Based on Acoustic Emission
Yilin Yuan, Gongtian Shen, Junjiao Zhang, Bo Zhao, Yongna Shen,
and Ke Bo
Abstract The high-density polyethylene material (HDPE) of the plastic liner
composite material full-wound gas cylinder (type IV gas cylinder) is made into three
types of tensile samples, sample with no pre-defects and V-shaped notch sample and
sample with preset round notch. Tensile tests were carried out on the three samples,
and the tensile process was monitored by acoustic emission method to obtain the
mechanical properties and acoustic emission signal characteristics of HDPE tensile
damage. The research shows that when detecting and monitoring the acoustic emission of the plastic liner, the VS150 sensor can be selected with the amplitude and
energy values as the characteristic parameters, and the acoustic emission signals at
different stages of the tensile process are correlated with the structural changes inside
the HDPE material molecules. The results of the study provide a basis for the fatigue
monitoring of Type IV gas cylinder acoustic emission.
24.1 Introduction
Plastic liner composite material full-wound gas cylinder (type IV gas cylinder)
appears as a new type of Compressed Natural Gas (CNG) gas cylinder due to its
advantages of light weight, high strength, fatigue resistance and corrosion resistance.
The bottle belongs to a high-pressure container for storing flammable and explosive
media. The general design pressure is mostly 20 MPa, which is highly dangerous,
and its explosion will cause casualties and property losses [1]. Due to the immature
manufacturing process, an explosion occurred during the application of the Type IV
gas cylinder. The Type IV gas cylinder was previously ordered to stop using and
became a shortage in the production of domestic gas cylinders [2]. Therefore, the
research on the safety technology of Type IV gas cylinder gave great significance to
gain a place in the competition of CNG automobile market.
The structure of CNG gas cylinders mainly includes a fiber reinforced layer,
an inner liner and an outer protective layer. At present, the non-destructive testing
Y. Yuan · G. Shen (B) · J. Zhang · B. Zhao · Y. Shen · K. Bo
China Special Equipment Inspection and Research Institute, Beijing 100029, China
e-mail: shengongtian@csei.org.cn
© The Author(s), under exclusive license to Springer Nature Singapore Pte Ltd. 2021
G. Shen et al. (eds.), Advances in Acoustic Emission Technology, Springer Proceedings
in Physics 259, https://doi.org/10.1007/978-981-15-9837-1_24
281
Experiment Research on Tensile Process
of Type IV Gas Cylinder Liner-HDPE
Based on Acoustic Emission
Yilin Yuan, Gongtian Shen, Junjiao Zhang, Bo Zhao, Yongna Shen,
and Ke Bo
Abstract The high-density polyethylene material (HDPE) of the plastic liner
composite material full-wound gas cylinder (type IV gas cylinder) is made into three
types of tensile samples, sample with no pre-defects and V-shaped notch sample and
sample with preset round notch. Tensile tests were carried out on the three samples,
and the tensile process was monitored by acoustic emission method to obtain the
mechanical properties and acoustic emission signal characteristics of HDPE tensile
damage. The research shows that when detecting and monitoring the acoustic emission of the plastic liner, the VS150 sensor can be selected with the amplitude and
energy values as the characteristic parameters, and the acoustic emission signals at
different stages of the tensile process are correlated with the structural changes inside
the HDPE material molecules. The results of the study provide a basis for the fatigue
monitoring of Type IV gas cylinder acoustic emission.
24.1 Introduction
Plastic liner composite material full-wound gas cylinder (type IV gas cylinder)
appears as a new type of Compressed Natural Gas (CNG) gas cylinder due to its
advantages of light weight, high strength, fatigue resistance and corrosion resistance.
The bottle belongs to a high-pressure container for storing flammable and explosive
media. The general design pressure is mostly 20 MPa, which is highly dangerous,
and its explosion will cause casualties and property losses [1]. Due to the immature
manufacturing process, an explosion occurred during the application of the Type IV
gas cylinder. The Type IV gas cylinder was previously ordered to stop using and
became a shortage in the production of domestic gas cylinders [2]. Therefore, the
research on the safety technology of Type IV gas cylinder gave great significance to
gain a place in the competition of CNG automobile market.
The structure of CNG gas cylinders mainly includes a fiber reinforced layer,
an inner liner and an outer protective layer. At present, the non-destructive testing
Y. Yuan · G. Shen (B) · J. Zhang · B. Zhao · Y. Shen · K. Bo
China Special Equipment Inspection and Research Institute, Beijing 100029, China
e-mail: shengongtian@csei.org.cn
© The Author(s), under exclusive license to Springer Nature Singapore Pte Ltd. 2021
G. Shen et al. (eds.), Advances in Acoustic Emission Technology, Springer Proceedings
in Physics 259, https://doi.org/10.1007/978-981-15-9837-1_24
281