2017
DOI: 10.1002/prep.201600128
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Effect of Pre‐strain Aging on the Damage Properties of Composite Solid Propellants based on a Constitutive Equation

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 damage properties. A statistical damage constitutive model based on continuum damage theory and statistical strength theory was established. The aging damage coefficient, making aging process of propellant equivalent to a form of damage, was introduced to correct the damage variable. Experimental results show that theoretical model has good agreem… Show more

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Cited by 18 publications
(14 citation statements)
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“…When studying the damage of solid propellants, scholars [32] assumed the Weibull distribution to be particularly suitable for describing the damage process of this type of material [33]. Considering that: (1) the damage evolution depends on tensile strain, and (2) according to the damage law [34], there is a debonding damage threshold ( ) as shown in Figure 4 [35], the expression of damage variable can be obtained as Equation :…”
Section: Resultsmentioning
confidence: 99%
See 1 more Smart Citation
“…When studying the damage of solid propellants, scholars [32] assumed the Weibull distribution to be particularly suitable for describing the damage process of this type of material [33]. Considering that: (1) the damage evolution depends on tensile strain, and (2) according to the damage law [34], there is a debonding damage threshold ( ) as shown in Figure 4 [35], the expression of damage variable can be obtained as Equation :…”
Section: Resultsmentioning
confidence: 99%
“…Therefore, the damage variable is defined as Equation ( 7): (7) When studying the damage of solid propellants, scholars [32] assumed the Weibull distribution to be particularly suitable for describing the damage process of this type of material [33]. Considering that: (1) the damage evolution depends on tensile strain, and (2) according to the damage law [34], there is a debonding damage threshold ( ) as shown in Figure 4 [35], the expression of damage variable can be obtained as Equation ( 8): (8) In Equation ( 8), and are the Weibull distribution parameters, which are the parameters that characterize the mechanical properties of the material and reflects its different response characteristics of the material to the external load.…”
Section: Constitutive Model Theorymentioning
confidence: 99%
“…The related parameters of the maximum tensile strength ( σ m ), initial modulus ( E 0 ), elongation at maximum tensile strength ( ε m ), and elongation at break ( ε b ) were calculated by the stress–strain curves. 24 …”
Section: Methodsmentioning
confidence: 99%
“…Based on statistical theory, the Weibull probability distribution function [48] can be used to characterize the local failure strength of these materials [49–52]. Assuming that damage evolution is dependent on the tensile strain and damage strain threshold, the damage probability density function of microelements can be expressed as follows:…”
Section: Constitutive Modelmentioning
confidence: 99%