Determination of mechanical behaviour of printed PLA specimens using digital image correlation
AbstractThis study presents the determination of mechanical properties of PLA material using 2D Digital Image Correlation (DIC) method. The tensile specimens were printed with a constant infill ratio and performed uniaxial tensile test with various test speeds. The elongations and local strains were measured with 2D DIC. Stress vs. strain curves were calculated from force data and DIC measurement. As a result, ultimate tensile stresses were directly proportional with the test speed increments, and maximum forces as well. The elongations were observed to decline during the test speed increments. It was underlined that the elongations gave the average results instead of the real behaviour of the fractured area.