According to the present technology, an impact test in which an impact application member is made to free fall onto a test sample of a plurality of types of rubbers having different physical properties is performed under prescribed test conditions; data for at least one of three items including a loss energy that is absorbed by the test sample when the impact application member collides with the test sample, a thermal energy that is generated at the test sample, and an indentation amount into the test sample by the impact application member is acquired; and an optimal test sample is selected from the respective test samples on a basis of a ranking of the superiority of the respective test samples with respect to the item(s) for which data was acquired.

According to the present technology, an impact test in which an impact application member is made to free fall onto a test sample of a plurality of types of rubbers having different physical properties is performed under prescribed test conditions; data for at least one of three items including a loss energy that is absorbed by the test sample when the impact application member collides with the test sample, a thermal energy that is generated at the test sample, and an indentation amount into the test sample by the impact application member is acquired; and an optimal test sample is selected from the respective test samples on a basis of a ranking of the superiority of the respective test samples with respect to the item(s) for which data was acquired.

This invention relates to a method and apparatus for examining eggs, in particular for determining eggshell characteristics of eggs, the method comprising, positioning the eggs to be examined, with a deformer, deforming a part of such an egg at least once, at least determining deformation contact time, and determining the shell stiffness and/or the eggshell strength of such an egg. Such a manner of detection can be suitably applied to sorting machines for eggs. With this methodology, in a short time, for a very large number of products, such as eggs in the present case, a quality parameter such as the strength and/or stiffness can be determined. With such determinations, in an advantageous manner, high requirements set in many fields of technology and industry can be met.

This invention relates to a method and apparatus for examining eggs, in particular for determining eggshell characteristics of eggs, the method comprising, positioning the eggs to be examined, with a deformer, deforming a part of such an egg at least once, at least determining deformation contact time, and determining the shell stiffness and/or the eggshell strength of such an egg. Such a manner of detection can be suitably applied to sorting machines for eggs. With this methodology, in a short time, for a very large number of products, such as eggs in the present case, a quality parameter such as the strength and/or stiffness can be determined. With such determinations, in an advantageous manner, high requirements set in many fields of technology and industry can be met.

A geotechnical apparatus comprising a holder with a coiled rod with a probe, such as a penetrometer, a rod bending/straightening device and a drive unit for both uncoiling the coiled continuous rod and pushing the uncoiled rod with the probe into the ground and for pulling such a rod with the probe out of the ground and recoiling the continuous rod, wherein the drive unit comprises two grippers to alternatingly grip the rod and move it along its longitudinal axis over a predefined length, the bending/straightening device has a first set of rollers, at least two of which are at one side of the rod and the remaining rollers are at an opposing side of the rod, such that the rollers convert the coiled rod to an essentially straight rod when uncoiling and convert the straight rod to a coiled rod of essentially constant coil diameter when coiling.

A geotechnical apparatus comprising a holder with a coiled rod with a probe, such as a penetrometer, a rod bending/straightening device and a drive unit for both uncoiling the coiled continuous rod and pushing the uncoiled rod with the probe into the ground and for pulling such a rod with the probe out of the ground and recoiling the continuous rod, wherein the drive unit comprises two grippers to alternatingly grip the rod and move it along its longitudinal axis over a predefined length, the bending/straightening device has a first set of rollers, at least two of which are at one side of the rod and the remaining rollers are at an opposing side of the rod, such that the rollers convert the coiled rod to an essentially straight rod when uncoiling and convert the straight rod to a coiled rod of essentially constant coil diameter when coiling.

A stone impact simulator is provided. That stone impact simulator includes a projectile propulsion section to propel a projectile toward a test sample and a projectile capture section to capture the projectile after the projectile ricochets off of the test sample. The projectile capture section includes a rebound block, a spent projectile storage compartment and a projectile energy dissipation element between the rebound block and the spent projectile storage compartment.

A dual indentation test method according to an aspect of the present disclosure may include a first indentation step of indenting a surface of a material using a flat first indenter and a second indentations step of indenting the surface of the material indented by the first indenter using a second indenter.

A dual indentation test method according to an aspect of the present disclosure may include a first indentation step of indenting a surface of a material using a flat first indenter and a second indentations step of indenting the surface of the material indented by the first indenter using a second indenter.

This disclosure relates to rapid and repeatable tests that can be used to evaluate the interfacial adhesion of coatings to substrates. In particular embodiments, tests are used to assess the resistance of anodic oxides to delamination from aluminum substrates. The tests can be conducted using standard hardness test equipment such as a Vickers indenter, and yield more controlled, repeatable results than a large sample of life-cycle tests such as rock tumble tests. In particular embodiments, the tests involve forming an array of multiple indentations within the substrate such that stressed regions where the coating will likely delaminate are formed and evaluated.