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Friday, July 17, 2020 | History

2 edition of Viscoelastic fracture characterization of a solid propellant found in the catalog.

Viscoelastic fracture characterization of a solid propellant

by Charles Miller Hertzler

  • 113 Want to read
  • 22 Currently reading

Published .
Written in English

    Subjects:
  • Aeronautics

  • The Physical Object
    Paginationp. ;
    ID Numbers
    Open LibraryOL25364340M

    This study presents the characterization of the nonlinearly viscoelastic behavior of double base propellant (DBP) using Schapery-type constitutive model in the different conditions of temperature, strain level and strain rate. A recursive-iterative numerical algorithm is generated for the Schapery-type nonlinearly viscoelastic constitutive and implemented in a displacement-based finite. Rate dependent fracture of a double cantilever beam with combined bulk and interfacial dissipation. International Journal of Solids and Structures , , DOI: /tr Wolfgang G. Knauss. A review of fracture in viscoelastic materials.

    A method of non-linear viscoelastic analysis of solid propellant grains for pressure load. Comput Struct. v B.S.V., Nageswara Rao, B. and Jana, M.K., Tensile fracture of HTPB based propellant specimens. Mater Sci Technol. v Google Scholar [7]. Nerse R. Characterization of a double-base propellant. MSc thesis. Viscoelastic Characterization of a Nonlinear Fiber-Reinforced Plastic , Vol. 5, pp. – Lucas, J. P., and Odegard, B. C., , “Moisture Effects on Mode 1 Interlaminar Fracture Toughness of Graphite Fiber Thermoplastic Matrix Composite,” Advances in Thermoplastic Matrix Structural Analysis of Realistic Solid Propellant.

    A three-branch viscoelastic model based on fractional derivatives is proposed for the viscoelastic behaviours of solid propellants. The simulation results show a satisfactory agreement with the str. Examples of areas of research could include investigation into fracture behavior of propellants, liners, insulation, adhesives, nozzle ablative liners, re-entry insulators, etc. Emphasis will be placed on material characterization of flaw behavior and analytical methods used to simulate these behaviors.


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Viscoelastic fracture characterization of a solid propellant by Charles Miller Hertzler Download PDF EPUB FB2

Experimental investigation of fracture surface energy of a solid propellant under different loading rates Engineering Fracture Mechanics, Vol. 31, No. 6 Investigations in the field of the mechanics of the fracture of viscoelastic bodiesCited by: In this study, evaluation of fracture toughness on a solid propellant was carried out under the assumption that the solid propellant is a linear viscoelastic material.

Viscoelastic fracture characterization of a solid propellant book As difficulties have developed in the functioning of solid rocket propellants, great emphasis has been given to studies directed at improving the quality of the propellant material, and even greater emphasis has been placed on the so-called characterization of these materials, or, in other words, on the study of their viscoelastic properties.

A viscoelastic kinetics (VEK) model for deformation and damage in solid rocket propellant has been previously developed and correlated to an extensive set of experiments to determine mechanical properties.

Ultimately, VEK will be extended to perform coupled damage and reaction modeling of XDT during propellant impacts. There are two types of damage considered in Author: E. Matheson, D. Nguyen. Dynamic loads generated in a shock tube were applied to the inner bore of annular specimens of a simulated solid propellant.

The load pulse-shape was approximately triangular, with essentially zero rise-time, a duration of about msec, and a variable intensity. At each particular pressure level the loading was repeated on a specimen until fracture of the specimen : Glenn Secor. Mechanical behavior of the Space Shuttle redesigned solid rocket motor (RSRM) propellant is studied from a phenomenological point of view.

Motivated by the study of the experimental data three initially isotropic constitutive models have been developed. Nelson, J., “Linear Viscoelastic Characterization of Redesigned Solid Rocket Motor. 1. Introduction. Owing to the widespread use of time-dependent viscoelastic materials such as solid propellant, Ni-alloy, dispersed fuel, bituminous concrete, and polymer matrix composite etc., it is necessary to have a better understanding of their fracture mechanism for achieving a material design and engineering application.

Fracture of solid rocket propellant grains Engineering Fracture Mechanics, Vol. 43, No. 3 ON THE NONLINEAR VISCOELASTIC CHARACTERIZATION OF CREEP AND STRESS RELAXATION OF POLYMERIC MATERIALS. Usually, the relaxation modulus over a wide range of time (i.e. 10 −10 –10 10 s) and over a narrow range of time (i.e.

– s) are both useful for the viscoelastic characterization of the solid propellants. Experimental results on polymeric composites are subsequently presented to illustrate this approach to deformation and fracture characterization.

Finally, extension to viscoelastic behavior is. Viscoelastic fracture characterization of a solid propellant. By Charles Miller. Hertzler Fracture characterization was then performed by experimentally relating the crack tip stress intensity factor to the crack velocity.

The theory was applied to solid propellant fracture tests; however, the dewetting behavior of the propellant was not. Solid propellants are an integral part of the structure of solid rockets although their chemical composition and overall configuration are dictated by ballistic requirements.

If the propellant is viewed as a material of construction, it must be characterized with respect to mechanical response, failure, and physical deterioration.

Results are coherent with Shapery’s theory of fracture for viscoelastic materials. Results can be used within finite element simulations to assess the safety and integrity of a solid-propellant rocket motor under various loads, such as thermal cycling and ignition, assuming stationary conditions.

Viscoelastic 'Fracture Characterization of a Solid Propellant 4. OES(RIPTIVE-NOT ES (7Ype of report ive datee) Aeronautical Engineer; (June )-j. AU THORISI (First name, middle initial, last name) Charles Miller Hertzler I.

REPORT OATE 7a. TOTAL NO. OF PAGES 7b. OF REFS June 41 14 _ CONTRACT OR GRANT NO. This review is written in honor of Max L. Williams who not only started this International Journal of Fracture (the author’s Ph.D.

advisor. Originally the Journal was called International Journal of Fracture Mechanics) but who had a seminally fundamental influence on the course of fracture mechanics in general, and specifically as applied to the time dependent failure of elastomers/polymers.

Propellant has some mechanical properties that are not found in ordinary structural materials and these have received relatively little study. The viscoelastic nature of solid propellant is time-history dependent and the material accumulates damage from repeated stresses; this is known as the cumulative-damage phenomenon.

FRACTURE • C AN1CS GENERAL FAILURE SURFACE STUDIES Test Analysis DYNAMIC VISCOELASTIC CHARACTERIZATION Dynamic Shear Modulus the mechanical behavior and failure properties of solid propellant with the basic characteristics of the propellant and its constituents.

This research. A solid-propellant rocket or solid rocket is a rocket with a rocket engine that uses solid propellants (fuel/oxidizer).The earliest rockets were solid-fuel rockets powered by gunpowder; they were used in warfare by the Chinese, Indians, Mongols and Persians, as early as the 13th century.

All rockets used some form of solid or powdered propellant up until the 20th century, when liquid. Abstract: The uniaxial tensile creep tests of the double-base solid propellant specimens were carried out at C under five different stress levels.

The viscoelastic models such as three parameters solid model, Burgers model, generalized Kelvin model, five parameters solid. This book is composed of 22 chapters that cover the many branches of studies that touch upon the science and technology of solid propellants.

Some chapters present the mathematical and physical theories underlying the behavior of solid propellants, such. The problem of separating two viscoelastic solids of different properties in a time dependent manner is considered. This work is part of a wider study concerned with the time dependent failure of viscoelastic adhesive bonds at and/or near the interface, including propagation of a crack away from the interface.This book deals with structural failure (induced by mechanical, aerodynamic, acoustic and aero-thermal, loads, etc.) of modern aerospace vehicles, in particular high-speed aircraft, solid propellant rocket systems and hypersonic flight vehicles, where structural integrity, failure prediction and service life assessment are particularly challenging, due to the increasingly more demanding.-Materials Characterization of Solid Propellants -Materials Characterization of Shape Memory Alloys -Superplasticity -Mechanics of Ice -Viscoelastic and Hydroelastic Behavior of Composites -Mechanisms of Failure of Fiber Composites -Interfacial Fracture -Crack Growth Mechanisms -Hydraulic Fracture for Enhancement of Oil Recovery.