By Shanglei Li, Anish Poudel (auth.), Helena Jin, Cesar Sciammarella, Sanichiro Yoshida, Luciano Lamberti (eds.)
Advancement of Optical tools in Experimental Mechanics: Proceedings of the 2013 Annual convention on Experimental and utilized Mechanics, the 3rd quantity of 8 from the convention, brings jointly contributions to this significant zone of study and engineering. the gathering provides early findings and case reviews on a variety of optical tools starting from conventional photoelasticity and interferometry to more moderen DIC and DVC thoughts, and contains papers within the following common technical examine components:
Optical metrology and displacement measurements at diversified scales
Digital holography and experimental mechanics
Optical size platforms utilizing polarized gentle
Digital photo correlation
Optical tools for MEMS and NEMS
Three-dimensional imaging and volumetric correlation
Imaging equipment for thermomechanics applications
3D volumetric circulate size
Optical residual pressure size techniques
Advances in imaging technologies
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Extra info for Advancement of Optical Methods in Experimental Mechanics, Volume 3: Conference Proceedings of the Society for Experimental Mechanics Series
Although by then an extended literature is available on the different types of identification methods, much less papers have been dedicated to the study of the interactions between the identification procedure and the full-field optical technique used to obtain the strain data. So far, the error assessment has most of the time been focused only on the full-field optical measurement [5, 6]. In order to study the interactions between measurement and identification technique, a test simulator aimed to reproduce the whole measurement chain was firstly proposed in .
Thus, the principle of virtual work, with the substitution of Eq. 22) The internal virtual work integral on the left hand side can be evaluated as Z ðQ1 E1 þ V Q2 E2 ÞEÃ1 dV ¼ Z m X k¼1 Vk ðQ1 E1 þ Q2 E2 ÞEÃ1 dV ! 23) where V k is the volume of a slice of width ΔX2 ¼ L2 =m and length L1 centred around X1 ¼ (X1)k. The integral over the kth slice is now considered. 25) l¼1 Then, Ik becomes Z " L1 Ik ¼ hΔX2 p X Q1 0 l¼1 p X þ Q2 ! # ðk;lÞ ðA~r2 Þ fn ðX1 ; l r r Þ fn ðX1 ; i r r ÞdX1 l¼1 ¼ hΔX2 p X Q1 ðA~r1 Þ l¼1 ðk;lÞ þ Q2 ðA~r2 Þ Z L1 ðk;lÞ Z L1 fn ðX1 ; l r r Þfn ðX1 ; i r r ÞdX1 0 !
When a tensile test is simulated, however, a much larger standard deviations of the identification parameters is obtained in the experiments compared to the simulated tests. This can be explained because of the out-of-plane movements that has to be considered in the simulator. The simulator has to be enriched including more source of errors to fit the experimental tests. After a calibration of the simulator using simple tensile tests, it can be used to correctly reproduce more complex experimental tests which involves heterogeneous strain fields and inverse methods to identify the constitutive parameters.
Advancement of Optical Methods in Experimental Mechanics, Volume 3: Conference Proceedings of the Society for Experimental Mechanics Series by Shanglei Li, Anish Poudel (auth.), Helena Jin, Cesar Sciammarella, Sanichiro Yoshida, Luciano Lamberti (eds.)