Rate-Dependent Tensile Behavior of Modular-Charge Howitzer Obturator Pad Material: Experimental and Constitutive Analysis
- Resource Type
- Conference
- Authors
- Li, Zhong-Gang; Chen, Long-Miao; Chen, Hong-Bin; Li, Yan-Ze
- Source
- 2022 International Conference on Mechanical Engineering and Power Engineering (MEPE) Mechanical Engineering and Power Engineering (MEPE), 2022 International Conference on. :85-91 Dec, 2022
- Subject
- Engineering Profession
Power, Energy and Industry Applications
Power engineering
Analytical models
Fitting
Data models
Behavioral sciences
Rubber
Mechanical engineering
rubber
constitutive model
visco-hyperelasticity
obturation (ballistics)
- Language
The rate-dependent tensile behavior of the obturator pad used as breechblock in the modular-charge howitzer is investigated experimentally and theoretically. To accurately determine the mechanical characteristics of the obturator pad material, uniaxial tension tests are carried out. The results indicate that the mechanical properties of specimen are obviously dependent on the strain rate. A modified Zhu-Wang-Tang (ZWT) visco-hyperelastic constitutive model has been presented, in which the standard elastic component has been substituted with several hyperelastic models, based on the physical behavior features. The model parameters were determined by fitting the model to experimental data by the least squares method. The results show that the visco-hyperelastic constitutive model proposed is capable of accurately describing the uniaxial mechanical property of the material used to make obturator pads. This study will serve as a theoretical guide for solving the chamber sealing problem of a modular charge howitzer.