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Dynamic Mechanical Response and Damage Mechanism of HTPB Propellant under Impact Loading.
Materials (Basel). 2020 Jul 07; 13(13)M

Abstract

The dynamic mechanical behaviors of Hydroxyl-terminated polybutadiene (HTPB) propellant was studied by a split Hopkinson pressure bar apparatus (SHPB) at strain rates ranging from 103 to 104 s-1. The obtained stress-strain curves indicated that the mechanical features, such as ultimate stress and strain energy, were strongly dependent on the strain rate. The real time deformation and fracture evolution of HTPB propellant were captured by a high-speed digital camera accompanied with an SHPB setup. Furthermore, microscopic observation for the post-test specimen was conducted to explore the different damage mechanisms under various conditions of impact loading. The dominated damage characteristics of HTPB propellant were changed from debonding and matrix tearing to multiple cracking modes of ammonium perchlorate (AP) particles, along with the increase of the strain rate. For the first time, the influence of AP particle density on the dynamic response of HTPB propellant was studied by analyzing the strain-rate sensitivity (SRS) index of HTPB propellant with two different filler content (80 wt.% and 85 wt.%), which deduced from a power function of ultimate stress and strain energy density. The result of this study is of significance for evaluating the structural integrity and security of HTPB propellant.

Authors+Show Affiliations

Xi'an Modern Chemistry Research Institute, Xi'an 710049, Shaanxi, China.Xi'an Modern Chemistry Research Institute, Xi'an 710049, Shaanxi, China.Department of Engineering Mechanics, School of Aerospace Engineering, State Key Laboratory for Strength and Vibration of Mechanical Structures, Xi'an Jiaotong University, Xi'an 710049, Shaanxi, China.Xi'an Modern Chemistry Research Institute, Xi'an 710049, Shaanxi, China.Xi'an Modern Chemistry Research Institute, Xi'an 710049, Shaanxi, China.Xi'an Modern Chemistry Research Institute, Xi'an 710049, Shaanxi, China.Xi'an Modern Chemistry Research Institute, Xi'an 710049, Shaanxi, China.

Pub Type(s)

Journal Article

Language

eng

PubMed ID

32645902

Citation

Zhang, Hengning, et al. "Dynamic Mechanical Response and Damage Mechanism of HTPB Propellant Under Impact Loading." Materials (Basel, Switzerland), vol. 13, no. 13, 2020.
Zhang H, Liu M, Miao Y, et al. Dynamic Mechanical Response and Damage Mechanism of HTPB Propellant under Impact Loading. Materials (Basel). 2020;13(13).
Zhang, H., Liu, M., Miao, Y., Wang, H., Chen, T., Fan, X., & Chang, H. (2020). Dynamic Mechanical Response and Damage Mechanism of HTPB Propellant under Impact Loading. Materials (Basel, Switzerland), 13(13). https://doi.org/10.3390/ma13133031
Zhang H, et al. Dynamic Mechanical Response and Damage Mechanism of HTPB Propellant Under Impact Loading. Materials (Basel). 2020 Jul 7;13(13) PubMed PMID: 32645902.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Dynamic Mechanical Response and Damage Mechanism of HTPB Propellant under Impact Loading. AU - Zhang,Hengning, AU - Liu,Meng, AU - Miao,Yinggang, AU - Wang,Han, AU - Chen,Tao, AU - Fan,Xuezhong, AU - Chang,Hai, Y1 - 2020/07/07/ PY - 2020/05/31/received PY - 2020/07/02/revised PY - 2020/07/04/accepted PY - 2020/7/11/entrez KW - damage mechanisms KW - hydroxyl-terminated polybutadiene propellant KW - split Hopkinson pressure bar KW - strain rate sensitivity JF - Materials (Basel, Switzerland) JO - Materials (Basel) VL - 13 IS - 13 N2 - The dynamic mechanical behaviors of Hydroxyl-terminated polybutadiene (HTPB) propellant was studied by a split Hopkinson pressure bar apparatus (SHPB) at strain rates ranging from 103 to 104 s-1. The obtained stress-strain curves indicated that the mechanical features, such as ultimate stress and strain energy, were strongly dependent on the strain rate. The real time deformation and fracture evolution of HTPB propellant were captured by a high-speed digital camera accompanied with an SHPB setup. Furthermore, microscopic observation for the post-test specimen was conducted to explore the different damage mechanisms under various conditions of impact loading. The dominated damage characteristics of HTPB propellant were changed from debonding and matrix tearing to multiple cracking modes of ammonium perchlorate (AP) particles, along with the increase of the strain rate. For the first time, the influence of AP particle density on the dynamic response of HTPB propellant was studied by analyzing the strain-rate sensitivity (SRS) index of HTPB propellant with two different filler content (80 wt.% and 85 wt.%), which deduced from a power function of ultimate stress and strain energy density. The result of this study is of significance for evaluating the structural integrity and security of HTPB propellant. SN - 1996-1944 UR - https://www.unboundmedicine.com/medline/citation/32645902/Dynamic_Mechanical_Response_and_Damage_Mechanism_of_HTPB_Propellant_under_Impact_Loading DB - PRIME DP - Unbound Medicine ER -
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