Low-temperature dynamic mechanical properties of thermal aging of hydroxyl-terminated polybutadiene-based propellant

Bing, Long; Chen, Xiangdong; Wang, Hongliang

doi:10.1007/s13726-021-00902-3

Cited by 8 publications

(5 citation statements)

References 21 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…These factors can induce internal structural damage to the propellant, manifesting as microcrack expansion, micropore proliferation, and weakened bonding strength between particles and the matrix, or at the matrix interface [9][10][11]. Over time, such damages accumulate, resulting in alterations to the propellant's macroscopic mechanical properties, such as reduced modulus and hardness [12][13][14][15][16].…”

Section: Introductionmentioning

confidence: 99%

Analysis of thermomechanical coupled accelerated aging of HTPB propellants

Zeng,

Huang,

Chen

et al. 2024

Propellants Explo Pyrotec

View full text Add to dashboard Cite

This study employed macroscopic uniaxial compression tests at low and medium strain rates, coupled with microscopic electron microscopy, to extensively analyse the impact of thermomechanical coupled aging on the accelerated aging of Hydroxyl‐terminated Polybutadiene (HTPB) propellants, contrasting it with the effects of isolated factors such as heat and dynamic reciprocating force. Results indicate that at various environmental temperatures (323 K, 343 K, and 363 K), thermomechanical coupled aging more significantly affects HTPB propellants than isolated factors. This effect is macroscopically evident in increased ease of deformation, permanent deformation during aging, continual increase in dissipated energy, and a decrease in average stress and ultimate strain post‐aging. Microscopically, the effect predominantly arises from the interplay between matrix thermal degradation and particle fragmentation, which rapidly accumulate and substantially impact the material's macroscopic mechanical properties. Furthermore, as the aging temperature rises, the alterations in both macroscopic mechanical properties and microscopic morphology of HTPB propellants become more pronounced. However, overly high temperatures may swiftly result in substantial material performance deterioration. Consequently, while elevating temperature effectively accelerates thermomechanical aging, the potential adverse effects on material performance must be judiciously considered. This underscores the necessity of balancing temperature regulation with aging efficiency enhancement in HTPB propellants to ensure effective control and quantitative assessment of the aging process, while minimizing material degradation.

show abstract

Section: Introductionmentioning

confidence: 99%

Analysis of thermomechanical coupled accelerated aging of HTPB propellants

Zeng,

Huang,

Chen

et al. 2024

Propellants Explo Pyrotec

View full text Add to dashboard Cite

show abstract

“…Therefore, it was particularly important to accelerate the creep experiment and establish the creep model [1][2][3] to predict the creep behavior. Creep is the most direct expression of the viscoelastic properties of polymers [4][5][6] and is also one of the main failure forms of material. Many engineering problems include creep 7,8 mainly exists in fan blades, bridges, parts and other places and has a great impact on safety performance of structure part.…”

Section: Introductionmentioning

confidence: 99%

Research and prediction of creep behavior of triaxial warp‐knitted composites by time–temperature equivalent principle

You,

Gao,

et al. 2023

Polymer Composites

View full text Add to dashboard Cite

In this paper, the creep behavior of triaxial warp‐knitted composites (TWKC) was investigated. The TWKC specimens were prepared by applying vacuum‐assisted resin infusion (VARI), and the three‐point bending creep experiments at different temperatures were carried out. The shift factor was calculated based on the activation energy method, and the creep curve at 25°C within 105s was obtained according to the time–temperature equivalence principle, the time–temperature equivalent model was established, and the model was verified by measuring the long‐term creep data with self‐made instrument. There is approximately agreement between the prediction result and experimental one, which is less than 10% within 105s. The results show that the model could be used to predict the creep behavior of TWKC. The viscoelastic properties of the specimen were analyzed based on dynamic mechanical analysis (DMA), and the creep behavior of TWKC was further analyzed by acoustic emission and digital image correlation damage analysis.Highlights The viscoelasticity of TWKC was analyzed based on dynamic mechanical analysis (DMA), and the activation energy was calculated. Based on the activation energy method, the time–temperature equivalent model was established to predict the creep behavior of TWKC. The creep behavior of TWKC were further analyzed by acoustic emission (AE) and digital image correlation (DIC) damage analysis.

show abstract

“…In this study, the research focused on a HTPB propellant with a solid content of over 70% [ 49 , 50 , 51 , 52 , 53 ], as shown in Figure 1 . Experimental measurements were conducted to determine the flow-dependent performance parameters of the propellant slurry.…”

Section: Introductionmentioning

confidence: 99%

Study on Rheological Properties and Pouring Process of Hydroxyl-Terminated Polybutadiene (HTPB) Propellants

Wang,

Ji,

Jiang

et al. 2023

Polymers

View full text Add to dashboard Cite

The process of solid propellant production, which is the most widely used high-energy material, has garnered significant attention from researchers. However, there have been relatively few studies on its processing, due to the unique nature of the casting process. This paper aims to further analyze the pouring process of the propellant slurry. Initially, we obtained a sample of the propellant slurry and measured its rheological parameters using a rotary rheometer. From the analysis of the experimental results, we derived the viscosity parameters and the yield values of the propellant slurry. Subsequently, we simulated the pouring process, setting the slurry parameters based on the data obtained from the rheological measurement experiment. The simulation results demonstrated that the flower plate significantly impacts upon the cutting and separating effect on the slurry during pouring. Upon leaving the flower plate, the slurry descends onto the core mold platform under the influence of gravity, gradually flowing along the edge of the core mold. Although there may be some small voids in the pouring process, the voids will disappear completely at the end of pouring. A comparison with the actual pouring situation revealed a higher consistency between the simulation results and reality, thus establishing the reliability of the simulation method as a reference for analyzing the pouring process.

show abstract

Low-temperature dynamic mechanical properties of thermal aging of hydroxyl-terminated polybutadiene-based propellant

Cited by 8 publications

References 21 publications

Analysis of thermomechanical coupled accelerated aging of HTPB propellants

Analysis of thermomechanical coupled accelerated aging of HTPB propellants

Research and prediction of creep behavior of triaxial warp‐knitted composites by time–temperature equivalent principle

Study on Rheological Properties and Pouring Process of Hydroxyl-Terminated Polybutadiene (HTPB) Propellants

Contact Info

Product

Resources

About