Effect of Pre-Strain Aging on the Microdamage Properties of Composite Solid Propellant

Dong Mo Zhou; Han Xu Wu; Xiang Yang Liu; Peng Jun Zhang; Hui Yuan Wang

doi:10.1002/prep.202000034

Effect of Pre-Strain Aging on the Microdamage Properties of Composite Solid Propellant

Dong Mo Zhou^*, Han Xu Wu, Xiang Yang Liu, Peng Jun Zhang, Hui Yuan Wang

^*Corresponding author for this work

School of Aerospace Engineering

North University of China

Research output: Contribution to journal › Article › peer-review

8 Citations (Scopus)

Abstract

Accelerated aging tests under pre-strain were conducted on HTPB-based composite solid propellant with the goal of investigating the effect of pre-strain aging on its microdamage properties. The tensile fracture morphologies, stress-strain curve and dissipative energy density of propellant samples were analyzed. Results showed that there was no obvious dewetting macroscopically when the pre-strain was less than 9 %, but the pre-strain can still cause microdamage of propellant interface. The microdamage of propellant interface can be characterized by the critical dewetting strain, corresponded to pre-strain by a linear law. The bonding performance between HTPB propellant matrix and solid filler was mainly affected by aging temperature. There was a critical temperature T_C, For the HTPB propellant investigated in this study, the T_C is between 65 °C and 70 °C. When aging temperature is below T_C, there was no significant decrease in the overall levels of dissipated energy density, but decrease began significantly when the aging temperature is above T_C.

Original language	English
Pages (from-to)	1234-1242
Number of pages	9
Journal	Propellants, Explosives, Pyrotechnics
Volume	45
Issue number	8
DOIs	https://doi.org/10.1002/prep.202000034
Publication status	Published - 1 Aug 2020

Keywords

Composite solid propellant
Critical dewetting strain
Dissipated energy density
Microdamage
Pre-strain

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10.1002/prep.202000034

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title = "Effect of Pre-Strain Aging on the Microdamage Properties of Composite Solid Propellant",

abstract = "Accelerated aging tests under pre-strain were conducted on HTPB-based composite solid propellant with the goal of investigating the effect of pre-strain aging on its microdamage properties. The tensile fracture morphologies, stress-strain curve and dissipative energy density of propellant samples were analyzed. Results showed that there was no obvious dewetting macroscopically when the pre-strain was less than 9 %, but the pre-strain can still cause microdamage of propellant interface. The microdamage of propellant interface can be characterized by the critical dewetting strain, corresponded to pre-strain by a linear law. The bonding performance between HTPB propellant matrix and solid filler was mainly affected by aging temperature. There was a critical temperature TC, For the HTPB propellant investigated in this study, the TC is between 65 °C and 70 °C. When aging temperature is below TC, there was no significant decrease in the overall levels of dissipated energy density, but decrease began significantly when the aging temperature is above TC.",

keywords = "Composite solid propellant, Critical dewetting strain, Dissipated energy density, Microdamage, Pre-strain",

author = "Zhou, {Dong Mo} and Wu, {Han Xu} and Liu, {Xiang Yang} and Zhang, {Peng Jun} and Wang, {Hui Yuan}",

note = "Publisher Copyright: {\textcopyright} 2020 Wiley-VCH Verlag GmbH & Co. KGaA, Weinheim",

year = "2020",

month = aug,

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doi = "10.1002/prep.202000034",

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T1 - Effect of Pre-Strain Aging on the Microdamage Properties of Composite Solid Propellant

AU - Zhou, Dong Mo

AU - Wu, Han Xu

AU - Liu, Xiang Yang

AU - Zhang, Peng Jun

AU - Wang, Hui Yuan

PY - 2020/8/1

Y1 - 2020/8/1

N2 - Accelerated aging tests under pre-strain were conducted on HTPB-based composite solid propellant with the goal of investigating the effect of pre-strain aging on its microdamage properties. The tensile fracture morphologies, stress-strain curve and dissipative energy density of propellant samples were analyzed. Results showed that there was no obvious dewetting macroscopically when the pre-strain was less than 9 %, but the pre-strain can still cause microdamage of propellant interface. The microdamage of propellant interface can be characterized by the critical dewetting strain, corresponded to pre-strain by a linear law. The bonding performance between HTPB propellant matrix and solid filler was mainly affected by aging temperature. There was a critical temperature TC, For the HTPB propellant investigated in this study, the TC is between 65 °C and 70 °C. When aging temperature is below TC, there was no significant decrease in the overall levels of dissipated energy density, but decrease began significantly when the aging temperature is above TC.

AB - Accelerated aging tests under pre-strain were conducted on HTPB-based composite solid propellant with the goal of investigating the effect of pre-strain aging on its microdamage properties. The tensile fracture morphologies, stress-strain curve and dissipative energy density of propellant samples were analyzed. Results showed that there was no obvious dewetting macroscopically when the pre-strain was less than 9 %, but the pre-strain can still cause microdamage of propellant interface. The microdamage of propellant interface can be characterized by the critical dewetting strain, corresponded to pre-strain by a linear law. The bonding performance between HTPB propellant matrix and solid filler was mainly affected by aging temperature. There was a critical temperature TC, For the HTPB propellant investigated in this study, the TC is between 65 °C and 70 °C. When aging temperature is below TC, there was no significant decrease in the overall levels of dissipated energy density, but decrease began significantly when the aging temperature is above TC.

KW - Composite solid propellant

KW - Critical dewetting strain

KW - Dissipated energy density

KW - Microdamage

KW - Pre-strain

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Effect of Pre-Strain Aging on the Microdamage Properties of Composite Solid Propellant

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Keywords

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