Alfelda Method

**Alfeld** is the process of determining the contact under load. **Adolphs (Alfeld) method** refers to modern methods for studying dynamic loads on contacts. The load acting on a contact is the result of more than one force. This load causes the contact point to move and is accompanied by the occurrence of irregularities and thermal phenomena. In order to correctly measure the roughness of a worn surface under conditions of thermal deformation, a certain sample mounting scheme is required. One of the most common methods of securing for solving problems is dynamometry. It includes the following steps: * preliminary finishing of the contact surface; * deburring before making contact; * establishing contact on the surface; * reading of dynamometer indicators at several points; * changing the contact form and repeating the procedure again with reading indicator readings, etc. It is important to note that the quality and reliability of the results obtained depends on the correctness of the experiment.

Accurate contact setting plays an important role in determining the contact during loading. The dimensions of the contact pad will be specified with the error of the directly established contact. This will lead to an increase in error when calculating forces under pressure in the intercontact zone. The worn joint surface has a rough shape and various types of residual stress are present on it. These stresses can lead to permanent deformations. Failure to timely determine the residual deformation will lead to further failure of the part. This is confirmed by the results