Rigidity considerations in fixture design—rigidity of clamping elements

An experimental investigation of fixture–workpiece contact behaviour for the dynamic simulation of complex fixture–workpiece systems

“…However, one of the remaining issues to address here is the definition of the spring profiles for different fixture-workpiece contact scenarios because it is critical that the spring elements in the model are able to emulate the realworld behaviour of the contact. Yeh and Liou [4] and Mittal et al [5], in their research, used contact profiles produced experimentally by Shawki and Abdel-Aal [6,7]. However, the fixture and workpiece parameters investigated by Shawki Fig.…”

“…A complete FEA model of the fixture and workpiece system. and Abdel-Aal [6,7] are rather dissimilar to the ones currently used in the aerospace and power generation industry. Therefore, a different set of experiments to produce the required profiles are warranted.…”

“…The hardware setup used for this experiment is similar, in concept, to the one used by Shawki and Abdel-Aal [6,7] in their experiments. The general idea is to apply a controlled load between the fixturing element and the workpiece and to measure and characterise the deformation that is caused by the applied load.…”

FEA-based methodology for the prediction of part–fixture behaviour and its applications

“…However, it has been shown that empirically derived contact rigidity profiles are more accurate in describing the behaviour of real-world part-fixture contacts [6]. Therefore, empirical models such as those derived by Shawki and Abdel Aal [8,9] and Ratchev et al [10] can be used to define the required contact rigidity profiles.…”

Analytical and finite element modeling of a machining system to minimize inaccuracy in milling and using rapid prototyping for die manufacturing

“…In another research project, Shawki and Abdel-Aal (1966b) investigated the contact rigidity of fixtures for three types of locating elements (spherical, flat, and V-shaped), where the force deflection characteristic was obtained in a miniature hy draulic press for a wide range of operating conditions. The experimental results…”