Crack propagation velocity and fracture toughness of hydroxyl-terminated polybutadiene propellants with consideration of a thermo-viscoelastic constitutive model: Experimental and numerical study

Wang, Tingyu; Xu, Jie; Li, Hui; Chen, Xiong; Zhang, Junfa

doi:10.1016/j.tafmec.2022.103732

Cited by 6 publications

(3 citation statements)

References 51 publications

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“…Wang's study [38] indicates that blunting fracture is a phenomenon exclusive to the HTPB propellant, but the aforementioned study demonstrates that the NEPE propellant also exhibits an obvious blunting phenomenon during the crack propagation process. In previous studies, many scholars have monitored the fracture process using high-speed digital cameras and studied the crack characteristics with video imaging systems [9,12,39,40].…”

Section: Determination Results and Analysis Of Crack Tip Behaviormentioning

confidence: 96%

“…Wang's study [38] indicates that blunting fracture is a phenomenon exclusive HTPB propellant, but the aforementioned study demonstrates that the NEPE pro also exhibits an obvious blunting phenomenon during the crack propagation pro previous studies, many scholars have monitored the fracture process using high digital cameras and studied the crack characteristics with video imaging s [9,12,39,40]. However, the video imaging system alone lacks accuracy, and thus on focuses of this study is to combine the video imaging system with image digitizatio nology in order to study the crack characteristics with the aim to improve the accu the analysis.…”

Section: Determination Results and Analysis Of Crack Tip Behaviormentioning

confidence: 99%

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Research on Crack Propagation of Nitrate Ester Plasticized Polyether Propellant: Experiments and Simulation

Liu,

Wang,

2024

Materials

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To understand the fracture properties of the nitrate ester plasticized polyether (NEPE) propellant, single-edge notched tension (SENT) tests were carried out at room temperature (20 °C) under different tensile rates (10–500 mm/min). The mechanical response, crack morphology, evolution path, and crack propagation velocity during the fracture process were studied using a combination of a drawing machine and a high-speed camera. The mode I critical stress intensity factor KIc was calculated to analyze the tensile fracture toughness of the NEPE propellant, and a criterion related to KIc was proposed as a means of determining whether the solid rocket motors can normally work. The experimental results demonstrated that the NEPE propellant exhibited blunting fracture phenomena during crack propagation, resulting in fluctuating crack propagation velocity. The fracture toughness of the NEPE propellant exhibited clear rate dependence. When the tensile rate increased from 10 mm/min to 500 mm/min, the magnitude of the critical stress intensity factor increased by 62.3%. Moreover, numerical studies based on bond-based peridynamic (BBPD) were performed by modeling the fracture process of the NEPE propellant, including the crack propagation speed and the load–displacement curve of the NEPE propellant. The simulation results were then compared with the experiments.

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Section: Determination Results and Analysis Of Crack Tip Behaviormentioning

confidence: 96%

Section: Determination Results and Analysis Of Crack Tip Behaviormentioning

confidence: 99%

Research on Crack Propagation of Nitrate Ester Plasticized Polyether Propellant: Experiments and Simulation

Liu,

Wang,

2024

Materials

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“…For solid propellant, there are usually 3 to 9 terms of Prony series are used to fit relaxation curve at room temperature or master relaxation curve under unsteady temperatures 5 , 24 , 32 , 44 , 49 . Besides, our recent study has shown that the relaxation curve at a signal temperature has a better prediction accuracy than the master curve under unsteady temperatures 51 . Therefore, in this work, the temperature is uncoupled.…”

Section: Model Parameters Identification and Validationmentioning

confidence: 98%

A nonlinear viscoelastic constitutive model with damage and experimental validation for composite solid propellant

Chen

et al. 2023

Sci Rep

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The development of a nonlinear viscoelastic constitutive model of composite solid propellant (CSP) coupled with effects of strain rate and confining pressure is essential to assess the reliability of solid propellant grains during ignition operation process. In the present work, a nonlinear viscoelastic constitutive model with novel energy-based damage initiation criterion and evolution model was firstly proposed to describe the coupled effects of confining pressure and strain rate on mechanical responses of CSP. In the developed damage initiation criterion and evolution model, the linear viscoelastic strain energy density was introduced as the damage driving force, and the coupled effects of strain rate, damage history and confining pressure on damage growth were taken into account. Then, uniaxial tensile tests from low strain rates to medium strain rates and various confining pressures, and stress relaxation tests were conducted using a self-made active confining pressure device. Finally, the identification procedures of model parameters and validation results of the constitutive model were presented. Moreover, the master curve of damage initiation parameter was constructed through the time-pressure superposition principle (TPSP). The results show that the developed nonlinear constitutive model is capable of predicting the stress–strain responses of CSP under different strain rates and confining pressures.

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Effects of dynamic loading and temperature on NEPE propellant: damage and ignition analysis

Guo,

Xu,

Chen

et al. 2024

Mech Time-Depend Mater

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Crack propagation velocity and fracture toughness of hydroxyl-terminated polybutadiene propellants with consideration of a thermo-viscoelastic constitutive model: Experimental and numerical study

Cited by 6 publications

References 51 publications

Research on Crack Propagation of Nitrate Ester Plasticized Polyether Propellant: Experiments and Simulation

Research on Crack Propagation of Nitrate Ester Plasticized Polyether Propellant: Experiments and Simulation

A nonlinear viscoelastic constitutive model with damage and experimental validation for composite solid propellant

Effects of dynamic loading and temperature on NEPE propellant: damage and ignition analysis

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