In this study, five different auxetic structures
were designed into dog bone specimens and printed with
approximated similar masses, intended as the constant
parameter. These specimens were then simulated by
Finite Element Analysis before being subjected to tensile
testing. In the simulation, yield stress comparisons
between auxetic structures and non-auxetic were
analyzed. UTS (Ultimate Tensile Stress) and maximum
strain from tensile test results were compared with 3D
printed non-auxetic with concentric infill. The results
showed agreement between simulation and testing in
terms of deformations and failure spots. In the end,
simulated auxetic structures showed extensions in
yielding limit at a range of 5-20% compared to control.
Meanwhile, four out of five tested auxetics were proved to
gain increment in UTS value at a range of 25.14%-
160.9% and additional maximum strain percentage by
4.1-31.49% compared to non-auxetic with 10.1 MPa and
2.48%, UTS and maximum strain Respectively.
Keywords : Additive Manufacturing; Auxetic Structure; Finite Element Analysis; Tensile Test; Polylactic Acid.