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In 1938, a research director for Thann & Mulhouse, Joseph Zeltner, first conceived the idea of Nylon 11, which was suggested in the works of Wallace Carothers. [3] Thann & Mulhouse had already been involved in processing castor oil for 10-undecenoic-acid, which would eventually be converted into the first amount of 11-aminoundecanoic acid in 1940 with the help of coworkers Michel Genas and ...
The Vickers hardness test was developed in 1921 by Robert L. Smith and George E. Sandland at Vickers Ltd as an alternative to the Brinell method to measure the hardness of materials. [1] The Vickers test is often easier to use than other hardness tests since the required calculations are independent of the size of the indenter, and the indenter ...
Package testing or packaging testing involves the measurement of a characteristic or property involved with packaging. This includes packaging materials, packaging components, [1] primary packages, shipping containers, and unit loads, as well as the associated processes.
Barcol hardness test, for composite materials; Tensile testing, used to obtain the stress-strain curve for a material, and from there, properties such as Young modulus, yield (or proof) stress, tensile stress and % elongation to failure. Impact testing Izod test; Charpy test; Fracture toughness testing Linear-elastic (K Ic) K–R curve
Float-equipped PA-11S at Seattle Renton in 1973. A small number of PA-11s have been modified to use a Tricycle landing gear. [3] The PA-11 was one of the first aircraft to be used by Piper for experiments with the nose wheel (also known as tricycle gear) configuration. Although its original design is intended to be a tail-dragger, a ...
In materials science and solid mechanics, biaxial tensile testing is a versatile technique to address the mechanical characterization of planar materials.It is a generalized form of tensile testing in which the material sample is simultaneously stressed along two perpendicular axes.