TY - JOUR
T1 - Deformation and fracture of 3D printed disordered lattice materials
T2 - Experiments and modeling
AU - Xu, Yading
AU - Zhang, Hongzhi
AU - Šavija, Branko
AU - Chaves Figueiredo, Stefan
AU - Schlangen, Erik
PY - 2019/1/15
Y1 - 2019/1/15
N2 - A method is presented to model deformation and fracture behavior of 3D printed disordered lattice materials under uniaxial tensile load. A lattice model was used to predict crack pattern and load-displacement response of the printed lattice materials. To include the influence of typical layered structures of 3D printed materials in the simulation, two types of printed elements were considered: horizontally and vertically printed elements. Strengths of these elements were measured: 3 mm cubic units consist of lattice elements with two printing directions were printed and their strengths were tested in uniaxial tension. Afterwards, the measured element strengths and bulk material strength, respectively, were used as model input. Uniaxial tensile tests were also performed on the printed lattice materials to obtain their crack pattern and load-displacement curves. Simulations and experimental results were comparatively analyzed. For both levels of disorder considered, only when measured strengths were assigned to the elements with identical printing direction, are the predicted crack patterns and load-displacement curves in agreement with experimental results. The results emphasize the importance of considering printing direction when simulating mechanical performance of 3D printed structures. The influence of disorder on lattice material mechanical properties was discussed based on the experiments and simulations.
AB - A method is presented to model deformation and fracture behavior of 3D printed disordered lattice materials under uniaxial tensile load. A lattice model was used to predict crack pattern and load-displacement response of the printed lattice materials. To include the influence of typical layered structures of 3D printed materials in the simulation, two types of printed elements were considered: horizontally and vertically printed elements. Strengths of these elements were measured: 3 mm cubic units consist of lattice elements with two printing directions were printed and their strengths were tested in uniaxial tension. Afterwards, the measured element strengths and bulk material strength, respectively, were used as model input. Uniaxial tensile tests were also performed on the printed lattice materials to obtain their crack pattern and load-displacement curves. Simulations and experimental results were comparatively analyzed. For both levels of disorder considered, only when measured strengths were assigned to the elements with identical printing direction, are the predicted crack patterns and load-displacement curves in agreement with experimental results. The results emphasize the importance of considering printing direction when simulating mechanical performance of 3D printed structures. The influence of disorder on lattice material mechanical properties was discussed based on the experiments and simulations.
KW - 3D printing
KW - Fracture
KW - Lattice material
KW - Lattice model
KW - Uniaxial tensile test
UR - http://www.scopus.com/inward/record.url?scp=85057166406&partnerID=8YFLogxK
U2 - 10.1016/j.matdes.2018.11.047
DO - 10.1016/j.matdes.2018.11.047
M3 - Article
AN - SCOPUS:85057166406
SN - 0264-1275
VL - 162
SP - 143
EP - 153
JO - Materials and Design
JF - Materials and Design
ER -