Monitoring Microstructural Evolution, Crack Formation, and Damage Characteristics near Crack Tip in a Highly Filled Elastomer-Using Digital Radiography X-ray Techniques

Liu, C. T.

doi:10.1007/s11340-006-9141-2

Cited by 4 publications

(2 citation statements)

References 13 publications

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“…At present, the experimental methods used for the identification for powder debonding of solid propellant include scanning electron microscopy (SEM), optical microscopy (OM), micro-CT (MCT), ultrasonic measurement (UT) etc. (Knollman and Yee, 1988; Liu, 2007; Nevière, 2006; Miller, 2019; Miqoi et al., 2021; Shekhar and Sahasrabudhe, 2011; Tang et al., 1995). However, these methods can’t consider the analysis of microscopic characteristics, quantitative characterization and real-time dynamic detection of damage simultaneously.…”

Section: Introductionmentioning

confidence: 99%

A coda wave interferometry to characterize and evaluate the powder debonding damage of solid propellant: Experimental investigation and discrete element simulation

Pan,

Yang,

et al. 2023

International Journal of Damage Mechanics

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The debonding of solid filler powder and binder matrix is the main form of damage for composite solid propellant. This study proposes a coda wave interference (CWI) analysis method to quantitatively characterize and evaluate the internal powder debonding damage of composite solid propellant by experiment and discrete element simulation. In order to verify the validity of numerical simulation, the discrete element method (DEM) samples to simulate the powder debonding damage of solid propellant are established, and the DEM simulation and micro-CT scanning experiment are carried out. The micro-experimental and DEM results prove the efficiency and accuracy of DEM samples in modeling the damage behaviors of solid propellant specimens. Furthermore, in order to quantitatively characterize and evaluate powder debonding damage of solid propellant, using CWI method to analyze the damage states of solid propellants in the experiment and DEM simulation of tension. Two coda evaluation parameters based on different damage states are proposed, and the relationship curves of coda evaluation parameters and tensile strain are obtained. Though the analysis of the curve results of experiment and DEM simulation, the validity of CWI is demonstrated. The coda evaluation parameters can quantitatively identify and judge the accumulation process of initial damage, the appearance of micro holes and the failure point of propellant.

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Section: Introductionmentioning

confidence: 99%

A coda wave interferometry to characterize and evaluate the powder debonding damage of solid propellant: Experimental investigation and discrete element simulation

Pan,

Yang,

et al. 2023

International Journal of Damage Mechanics

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“…It is generally believed that end-burning cone burning effect and pressure rise are affected by both physical and chemical mechanisms. And the physical mechanism mainly includes particle aggregation [3], shear flow [4], composition shift [5,6], stress [5,6], heat conduction effects [7], stressinduced grain defect [8], and end motor structure [9], while chemical mechanism mainly contains chemical reaction feature [10], heat flux of gas [11], and flame stretch by the velocity field [12]. In order to prevent the cone problem and interior ballistic instability from affecting the performance and reliability of a grain, the improvement in grain configuration [13], an important means of stabilizing the working pressure is often adopted.…”

Section: Introductionmentioning

confidence: 99%

Burning Rate Enhancement Analysis of End-Burning Solid Propellant Grains Based on X-Ray Real-Time Radiography

Wei

Tao

Wang³

et al. 2020

International Journal of Aerospace Engineering

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Unexpected pressure rise may occur in the end-burning grain solid rocket motor. It is generally believed that this phenomenon is caused by the nonparallel layer combustion of the burning surface, resulting in the increase of burning rate along the inhibitor. In order to explain the cause of this phenomenon, the experimental investigation on four different end configurations were carried out. Based on the X-ray real-time radiography (RTR) technique, a new method for determining the dynamic burning rate of propellant and obtaining the real-time end-burning profile was developed. From the real-time images of the burning surface, it is found that there was a phenomenon of nonuniform burning surface displacement in the end-burning grain solid rocket motor. Through image processing, the real-time burning rate of grain center line and the real-time cone angle are obtained. Based on the analysis of the real-time burning rate at different positions of the end surface, the end face cone burning process in the motor working process is obtained. The closer to the shell, the higher the burning rate of the propellant. Considering the actual structure of this end-burning grain motor, it is speculated that the main cause of the cone burning of the grain may be due to the heat conduction of the metal wall. By adjusting the initial shape of the grain end surface, the operating pressure of the combustion chamber can be basically unchanged, so as to meet the mission requirements. The results show that the method can measure the burning rate of solid propellant in real time and provide support for the study of nonuniform combustion of solid propellant.

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Effect of the open crack on the pull-in instability of an electrostatically actuated micro-beam

Motallebi

Fathalilou

Rezazadeh

2012

Acta Mechanica Solida Sinica

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Monitoring Microstructural Evolution, Crack Formation, and Damage Characteristics near Crack Tip in a Highly Filled Elastomer-Using Digital Radiography X-ray Techniques

Cited by 4 publications

References 13 publications

A coda wave interferometry to characterize and evaluate the powder debonding damage of solid propellant: Experimental investigation and discrete element simulation

A coda wave interferometry to characterize and evaluate the powder debonding damage of solid propellant: Experimental investigation and discrete element simulation

Burning Rate Enhancement Analysis of End-Burning Solid Propellant Grains Based on X-Ray Real-Time Radiography

Effect of the open crack on the pull-in instability of an electrostatically actuated micro-beam

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