Abstract
In this study, the impact behavior of patch-repaired layered composite plates under low velocity impact loads was numerically investigated. For this purpose, layered composite plates with holes with different geometries in the middle were repaired with patches using various adhesives. Impact behavior of the composite material was investigated by dropping the strikers with different speeds on the repaired composite plate. Layered composite plate was used as the sheet and patch material, and the orientation angles are [0 ° / 45 ° / 45 ° / 0 °] for the plate and [0 ° / 45 °] for the patch. ANSYS Ls-Dyna finite element package program was used for three dimensional modelling and solution. Therefore, the effects of variables such as striker, adhesive, plate and patch on the impact behavior of layered composite material were investigated for different boundary conditions. It has been determined that the hexagonal patch type performs better than other patch geometries.
Highlights
In the light of technological developments, innovations about the design, production and repair ability of materials have emerged and various researches are carried out on their applicability
In this study, the impact behavior of patch-repaired layered composite plates was numerically investigated under low velocity impact loads
Composite materials are highly preferred in machinery and building systems thanks to their ability to be produced in accordance with the intended use to contain the features of the components that make it up and to have higher strength and performance
Summary
In the light of technological developments, innovations about the design, production and repair ability of materials have emerged and various researches are carried out on their applicability. With the development of production techniques, a significant part of the elements that constitute the machine and building system can be produced from composite materials. Plates are exposed to impacts and stresses depending on where they are used, and as a result, different stresses occur. These stresses can damage the plates and prevent them from performing their essential function. Fiber reinforced composites exhibit brittle fracture behavior and damage occurs due to fiber breakage resulting from impact. These fractures cause the start and spread of the damage on the surfaces outside the impact contact area, and sometimes even invisible delamination (separation between layers) damage. It is important to carry out studies to increase impact resistance during manufacturing or production phases
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