Constitutive modeling of viscoelastic materials with damage – computational aspects

Canga, Marcelo E.; Becker, Eric B.; Özüpek, Şebnem

doi:10.1016/s0045-7825(00)00231-0

Cited by 37 publications

(15 citation statements)

References 3 publications

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“…f and f are constants related to e 0 and t a , respectively. Using the data in Figure 5, e th0 , f and f were determined to be 0.07726, À0.07322, and À6.6 3 10 À5 d À1 , respectively. The related coefficient for Equation (12) was 0.8915.…”

Section: Damage Strain Thresholdmentioning

confidence: 99%

Effect of Pre‐strain Aging on the Damage Properties of Composite Solid Propellants based on a Constitutive Equation

Zhou

Liu

Sui

et al. 2017

Propellants Explo Pyrotec

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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 agreement with experimental results and can accurately describe the mechanical behavior of propellant during pre‐strain aging. Further analysis indicated that the damage effects caused by pre‐strain can be identified from the equation of the aging damage coefficient. Aging time influences both tensile strength and shape characteristics of the stress‐strain curve of propellant in the damage stage, while pre‐strain only decreased the tensile strength. The strain damage threshold value decreased linearly over the aging period and with increasing pre‐strain level during the aging process.

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Section: Damage Strain Thresholdmentioning

confidence: 99%

Effect of Pre‐strain Aging on the Damage Properties of Composite Solid Propellants based on a Constitutive Equation

Zhou

Liu

Sui

et al. 2017

Propellants Explo Pyrotec

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“…Figure 1 shows the stress strain and volume dilatation strain relations for a redesigned space-shuttle solid rocket motor (RSRM) propellant subject to uniaxial tension at a low strain rate [6]. The RSRM propellant consists of ammonium perchlorate (69.7 %(wt.…”

Section: Introductionmentioning

confidence: 99%

The cohesive law of particle/binder interfaces in solid propellants

Tan

2011

Progress in Propulsion Physics

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Solid propellants are treated as composites with high volume fraction of particles embedded in the polymeric binder. A micromechanics model is developed to establish the link between the microscopic behavior of particle/binder interfaces and the macroscopic constitutive information. This model is then used to determine the tension/shearing coupled interface cohesive law of a redesigned solid rocket motor propellant, based on the experimental data of the stress strain and dilatation strain curves for the material under slow rate uniaxial tension.

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“…A calibration of a number of parameters is required prior to using the model for numerical simulation predictions. A modification of this model in order to be used in finite element simulations was done by Canga et al (2001). These researchers considered that the presence of voids affected the volumetric response by reducing the bulk modulus, softened the deviatoric response which was described by means of a damage function, and affected the dissipation work on cyclic loading through another cyclic loading function.…”

Section: Introductionmentioning

confidence: 99%

Constitutive modeling of solid propellant materials with evolving microstructural damage

Aravas

Sofronis

2008

Journal of the Mechanics and Physics of Solids

102

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Constitutive modeling of viscoelastic materials with damage – computational aspects

Cited by 37 publications

References 3 publications

Effect of Pre‐strain Aging on the Damage Properties of Composite Solid Propellants based on a Constitutive Equation

Effect of Pre‐strain Aging on the Damage Properties of Composite Solid Propellants based on a Constitutive Equation

The cohesive law of particle/binder interfaces in solid propellants

Constitutive modeling of solid propellant materials with evolving microstructural damage

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