Definition of Area of the Maximum Shear Deformations for CFRP Samples on Iosipescu Method, With Use of Optical System of Measurements

Estimation of Sheet Deformation of Aluminium Blank using Non-Contact Methods on the Example of Erichsen Cupping Test

“…housing part (c) [2] and special application parts (d) [3] There is a sufficiently great number of Russian and foreign works, in which the deformation of materials is assessed in a non-contact manner, during mechanical tests, with further plotting flow curves, forming limit diagrams, etc. Many works contain the research on the application of non-contact strain assessment systems: to collect data on material behavior for subsequent accurate computer simulation of sheet material fracture under different loading conditions (uniaxial tension, bulging test according to standard ISO 16808:2022) [9]; for capturing strains of sandwich structure based on steel sheet and glass fiber [10]; to measure the strain of carbon fiber-reinforced plastic specimens according to GOST R 56799-2015 [11]; to clarify the macroscopic localization of non-uniform plastic flow as a result of the Porteven-Le Chatelier effect of aluminum specimens at different stress-strain states (SSS) [12,13]; to obtain information on the ultimate forming curve by the Marcignac method, according to the standard ISO ISO-12004-2-2021 [14]; for determining critical strain values in uniaxial tension of steel specimens with stress concentrators [15], for determining the strain field when testing composite materials based on glass-textolite and carbon fiber-reinforced plastic under uniaxial tensile pattern [16]. Based on non-contact algorithms of strain estimation, a system can be developed to determine the micro-and macro-architectonics of the surface based on captures of the surface of a welded stainless steel specimen subjected to fatigue testing [17].…”