A team of researchers of the Universitat Politécnica de València (Valencia, Spain) and the Universidad Politécnica Salesiana del Ecuador (Cuenca, Ecuador) published their research on different infills in 3D printed objects.
The researchers tested the flexibility and the strength of a 150x20x6mm object that was 3D printed with different infills. The team used 3mm ABS filament to produce the test object and produced them with line, rectilinear and honeycomb infill. The objects were also produced with different infill densities.
The study shows that the form of infills chosen results in different characteristics regarding the tensile strength, weight and the elastic modulus.
The relationship between the form of infill like lines, rectilinear and honeycomb shows larger differences in the elastic modulus of the object. But the team states that this field needs more research to say if the flexibility between the layers causes that. Also the researchers want to test the different infills with PLA filament.
You can read the paper in the 3D Printing and Additive Manufacturing Journal here.