CHINESE JOURNAL OF ENERGETIC MATERIALS
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Tensile Mechanical Properties and Strength Master Curve of Thermal Aged CMDB Propellant
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School of Mechanical Engineering, Nanjing University of Science and Technology, Nanjing 210094, China

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    Abstract:

    To investigate the quasi-static tensile mechanical properties of aging high solid content modified double-base propellants (CMDB), the uniaxial tensile tests of CMDB propellant were carried out at four different temperatures (323, 293, 273, 253 K) and different strain rates (3.3×10-5, 3.3×10-4, 3.3×10-3, 3.3×10-2 s-1). The CMDB propellant samples with different aging time (0,10,20,35,50,65,80,100 d) were tested by gas chromatography. The mechanical properties of CMDB propellant and the change of stabilizer content after aging were studied. The results show that the maximum elongation and the content of stabilizer decrease significantly during the aging process, which can be used as the failure criterion of the aging CMDB propellant. By using the time-temperature superposition principle (TTSP), the maximum tensile strength curve of CMDB propellant was obtained, and the aging strength main curve equation was established, which could be used to predict the maximum tensile strength of CMDB propellant with different aging time in the range of quasi-static strain rate.

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刘家铭,许进升,陈雄,等.热老化改性双基推进剂拉伸力学性能及强度主曲线[J].含能材料,2021,29(9):819-826.
LIU Jia-ming, XU Jin-sheng, CHEN Xiong, et al. Tensile Mechanical Properties and Strength Master Curve of Thermal Aged CMDB Propellant[J]. Chinese Journal of Energetic Materials,2021,29(9):819-826.

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History
  • Received:December 31,2020
  • Revised:June 29,2021
  • Adopted:June 23,2021
  • Online: June 28,2021
  • Published: September 25,2021