PSI - Issue 47

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Rachid Bensaada et al. / Procedia Structural Integrity 47 (2023) 503–512 R. Bensaada et al. / Structural Integrity Procedia 00 (2019) 000 – 000

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b)

c)

Fig. 3. Post Pull-Off fracture facies of Tensylon® assembled with substrates a)Steel, b) Aluminum, c) ABS

2.3 Adhesive and Tensylon® testing preparation After substrate and adhesive selection, an Arcan test is performed on only adhesive. The Adhesive is spread on the lower substrate surface before making the assembly with the upper substrate surface. The substrates were maintained in this position during the curing process by two screws screwed with a torque screwdriver (Fig. 4a). The same steps were followed to bond the Tensylon to the ABS Substrates (Fig. 4b). The specimens were cured for 48h before testing. The extremities (the screwed parts), necessary for the assemblies preparation, are removed after adhesive curing by means of diamond disc.

b)

a)

Fig. 4. Assembly preparation for a) Adhesive testing; b) Tensylon® out-of-plane testing

Concerning the experimental test, the post-treatment for the adhesive testing as well as the Tensylon® testing was achieved by Digital Image Correlation (DIC) thanks to the Aramis® software (GOM 2011). This device makes it possible to measure the relative displacement of the substrates with a minimum resolution of 1 µm. This method requires a speckled pattern applied on the substrate face in the front of the camera (Fig. 5).

Fig. 5. Surface preparation and selection for DIC treatment