Liner-Propellant Bond Tests.
DEPARTMENT OF THE ARMY WASHINGTON DC
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This report describes a method of determining tensile bond strength and lap shear strength between a linerinsulation material and a propellant composition which is cured to portions of the linerinsulation material. The linerinsulation material is bonded to a propellant composition in a dogbone configuration by positioning a predetermined size of the linerinsulation material in a groove that is constructed in a mold in a transverse direction for a tensile bond strength specimen whereby the propellant is bonded to each side of the exposed linerinsulation material. The lap shear specimen is formed in a mold wherein a predetermined size of the linerinsulation material is longitudinally positioned in a groove that is constructed in a mold. The linerinsulation material is centered with a pair of spacers having about one-half of the length of the linerinsulation material to prevent a cast propellant composition from binding to the portion covered by the spacers but to permit the remaining portion of the linerinsulation material to be embedded and cured in the propellant composition that is cast and cured in the mold.
- Test Facilities, Equipment and Methods
- Rocket Propellants