PSI - Issue 37

Rogério Lopes et al. / Procedia Structural Integrity 37 (2022) 123–130 R. F. Lopes et al./ Structural Integrity Procedia 00 (2019) 000 – 000

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the buckling effect. This phenomenon induces high instability in the structure which directly leads to a challenge. Thus, we choose to continue the remaining analysis only with the Pamcrash software, which in this case allowed a better approximation to the experimental results. In the Fig. 5 a comparison between the final geometry in the experimental and numerical test, is shown. It is possible to notice that there is an excellent similarity for the final configuration. In this way, Pamcrash was able to accurately predict the behavior of the door system.

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Fig. 5. Direct final geometry comparison between numerical and experimental methods: a) front view and b) back view

3.1. Strain comparison The experimental results from six unidirectional strain gauges were considered. Four of them are positioned in the 355 3 alloy steel, while the others in the 10130 01 alloy steel. The Fig. 6 shows the location of the several strain gauges.

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Fig. 6. Experimental location of strain gauges on the door: a) front view and b) back view The Fig. 7.a) shows a comparison for the strain values, measured experimentally and numerically, by the 1 and 4 strain gauges, while the Fig. 7.b) shows the plot data of 5 and 6 strain gauges. In the Fig. 8, the values 2 and 3 , represents the only ones positioned in the 10130 01 steel. At the first sight, there is low variation between the experimental and numerical curves. Note that experimental values are represented by solid dashes while numerical values are represented by round dot dashes. Strain gauges located close to the surrounding load application area are those that vary the most, as expected. If we look at the 6 , which is positioned quite far from the loading area, there is a reasonable agreement between the two curves. This fact is similar to 2 . The only strain gauge that suffered permanent deformation are located in 10130 01 .