Adhesives and adhesive joints under impact loadings: An overview

Development of a Drop Weight Machine for Adhesive Joint Testing

“…When a high load is applied in an, almost, instantaneous period of time on a material, it can be considered as an impact load. When this type of loading is used to test adhesives, they are subjected to high strain rates and, consequently, properties like stiffness, yield stress and elongation are affected [7]. These properties can be studied by means of specific tests, that can be seen in Table 2.1.…”

“…These properties can be studied by means of specific tests, that can be seen in Table 2.1. Table 2.1 -Studied properties of adhesive joints and associated types of test [7].…”

“…However, different types of tests are made to assess the impact behaviour of adhesive joints. These tests give important information about the adhesive joint tested, like the adherent properties, surface preparation or joint geometry [7]. When studying the structural integrity of adhesive joints under impact conditions, three questions should be kept in mind:…”

“…To answer these questions, it´s important to have simple, yet accurate, tests that can be made in a reliable and repeatable way [8]. There are some tests that can be performed on adhesive joints and they are usually divided in terms of velocity, as it is shown in Table 2.2 [7].…”

The Influence of Selected Test Conditions on the Impact Strength of Adhesively Bonded Connections

“…In addition, the stiffness of the test stand appears to be of key importance to the reliability of the results, as it is usually disregarded. One of the most popular methods of impact strength testing of glued connections is the standard method [11][12][13]. This research technique includes many of the described features, therefore it was decided to carry out investigations that will make it possible to assess the influence of certain factors on the obtained results.…”