No abstract

Current versions of two methods commonly used for the determination of tearing strength require clarification regarding treatment of the data obtained and revision to accommodate newer types of inertialess testing machines. Experimental information, providing the necessary background data, has been obtained. Sixteen fabrics of mili tary interest have been tested by the Tongue (single rip) method and the Trapezoid method, on both pendulum and inertialess testing machines. The experimental data for these fabrics are analyzed to permit a comparison of both methods and both machines. It is concluded that existing test method procedures are vague in respect to the inter pretation of the data obtained, and results given by the two types of testing machine differ significantly. The Trapezoid method could be interpreted equally well through a single maximum tearing force for each specimen, but the Tongue (single rip) method is the more satisfactory experimental procedure. It is suggested that the latter be utilized in specifications governing fabric procure ment. The question of the relationship between existing tearing-strength test methods and service conditions and requirements is raised.

No abstract

No abstract

No abstract