ASTM D2507-93(2001)

Standard Terminology of Rheological Properties of Gelled Rocket Propellants (Withdrawn 2003)

SCOPE
1.1 These definitions cover the flow properties of gelled propellants of interest to the aerospace industry.

General Information

• Status: Withdrawn
• Publication Date: 14-Mar-1993
• Withdrawal Date: 21-Oct-2003
• ICS: 75.160.10 - Solid fuels
• Technical Committee: F07 - Aerospace and Aircraft
• Drafting Committee: F07.90 - Executive

Relations

• Replaces: ASTM D2507-93 - Standard Terminology of Rheological Properties of Gelled Rocket Propellants
• Effective Date: 15-Mar-1993
• Referred By: ASTM C647-19 - Standard Guide to Properties and Tests of Mastics and Coating Finishes for Thermal Insulation
• Effective Date: 15-Mar-1993
• Referred By: ASTM D907-15(2023) - Standard Terminology of Adhesives
• Effective Date: 15-Mar-1993

Standards Content (Sample)

NOTICE: This standard has either been superceded and replaced by a new version or discontinued.
Contact ASTM International (www.astm.org) for the latest information.
Designation: D 2507 – 93 (Reapproved 2001)
Standard Terminology of
Rheological Properties of Gelled Rocket Propellants
This standard is issued under the fixed designation D 2507; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval. A
superscript epsilon (e) indicates an editorial change since the last revision or reapproval.
1. Scope Discussion—The ratio decreases asymptotically with dura-
tion of shear.
1.1 These definitions cover the flow properties of gelled
Class III—Non-Newtonian Shear-Thickening Fluid—a
propellants of interest to the aerospace industry.
fluid in which the shear stress is not directly proportional to
2. Terminology
the shear rates, and in which the shear stress-shear rate ratio
increases as the shear stress increases.
2.1 Definitions:
(a) Type A—Dilatant Fluid—a Class III fluid that exhibits
apparent viscosity (of a non-Newtonian fluid)——the vis-
a shear stress-shear rate ratio that is independent of the duration
cosity of a Newtonian fluid that produces the same reading
of application of shear stress.
in the same apparatus under identical conditions.
(b) Type B—Rheopectic Fluid—A Class III fluid that
Discussion—Avoidance of this artificial term is recom-
exhibits time-dependent, reversible changes of the shear stress-
mended.
shear rate ratio.
Classification of Fluids:
Discussion—The ratio increases asymptotically with dura-
Class I—Newtonian Fluid—a fluid that exhibits a direct
tion of shear.
proportionality between shear stress and shear rate in the
emulsion—a two-phase liquid system in which small droplets
region of laminar flow.
of one liquid (the internal phase) are immiscible in, and are
Discussion—The shear rate is independent of the time of
dispersed uniformly throughout, a second, continuous liquid
application of shear stress.
phase (the external phase).
Class II—Non-Newtonian Shear-Thinning Fluid—a fluid in
gel—a liquid containing a colloidal structural network that
which the shear stress is not directly proportional to the shear
forms a continuous matrix and completely pervades the
rate and in which the shear stress-shear rate ratio decreases
liquid phase.
as the shear stress increases.
Discussion—A gel deforms elastically upon application of
(a) Type A—Plastic Fluid—a Class II fluid that exhibits a
shear forces less than the yield stress. At shear forces above the
change in shear rate directly proportional to the change in shear
yield stress, the flow properties are principally determined by
stress above the yield stress.
the gel matrix.
(b) Type B—Pseudoplastic Fluid—a Class II fluid that
viscosity—the ratio of shear stress to shear rate. For non-
exhibits a shear stress-shear rate ratio that is independent of the
Newtonian fluids, it is preferable to report s
...