TY - JOUR
T1 - Using Compliant Interlayers as Crack Arresters in 3-D-Printed Polymeric Structures
AU - Arbeiter, Florian
AU - Petersmann, Sandra
AU - Wiener, Johannes
AU - Oesterreicher, Florian
AU - Spörk, Martin
AU - Pinter, Gerald Gerhard
PY - 2020/11/1
Y1 - 2020/11/1
N2 - The aim of this study is to show the influence of using compliant interlayers as crack arresters for three-dimensional (3-D)-printed polymeric structures. To investigate the effectiveness of compliant interlayers, specimens consisting of a stiff and brittle matrix and thin compliant interlayers were printed. The results of these polymeric composites were compared to pure matrix material samples. To generate specimens, a commercially available material extrusion-based desktop 3-Dprinter was used. Additively manufactured samples were tested in both impact as well as fracture mechanical tests. The application of a compliant interlayer as crack arrester showed high potential in both types of test. Instrumented Charpy impact tests according to EN ISO 179-2 revealed an increase of notched impact strength from 5.0 ± 0.1 kJm−2 to 25 kJm−2 (energy up to Fmax) and 136 ± 2.6 kJm−2 (total energy during testing), respectively. This indicates an increase of roughly 725% and 2,720%, while the maximum force during testing remained almost unchanged at approximately 200 N. Interestingly, the exact position as well as the number of compliant interlayers did not show a significant influence on the results. Therefore, tests that are more detailed were conducted on specimens including only a single interlayer. Further tests consisted of J-integral testing on specimens with aforementioned single compliant interlayers. Crack resistance (J-R curves) were generated using the multi-specimen approach and evaluation according to the protocol of the European Structural Integrity Society. Although a special data-shifting procedure has to be applied to interpret results more clearly, J-integral values showed a significant increase of 250 % at the interface between materials compared to the pure matrix material.
AB - The aim of this study is to show the influence of using compliant interlayers as crack arresters for three-dimensional (3-D)-printed polymeric structures. To investigate the effectiveness of compliant interlayers, specimens consisting of a stiff and brittle matrix and thin compliant interlayers were printed. The results of these polymeric composites were compared to pure matrix material samples. To generate specimens, a commercially available material extrusion-based desktop 3-Dprinter was used. Additively manufactured samples were tested in both impact as well as fracture mechanical tests. The application of a compliant interlayer as crack arrester showed high potential in both types of test. Instrumented Charpy impact tests according to EN ISO 179-2 revealed an increase of notched impact strength from 5.0 ± 0.1 kJm−2 to 25 kJm−2 (energy up to Fmax) and 136 ± 2.6 kJm−2 (total energy during testing), respectively. This indicates an increase of roughly 725% and 2,720%, while the maximum force during testing remained almost unchanged at approximately 200 N. Interestingly, the exact position as well as the number of compliant interlayers did not show a significant influence on the results. Therefore, tests that are more detailed were conducted on specimens including only a single interlayer. Further tests consisted of J-integral testing on specimens with aforementioned single compliant interlayers. Crack resistance (J-R curves) were generated using the multi-specimen approach and evaluation according to the protocol of the European Structural Integrity Society. Although a special data-shifting procedure has to be applied to interpret results more clearly, J-integral values showed a significant increase of 250 % at the interface between materials compared to the pure matrix material.
KW - Additive manufacturing
KW - Fracture toughness
KW - Fused filament fabrication
KW - Impact testing
KW - Polyethylene terephthalate glycol
KW - Thermoplastic copolyester
KW - Three-dimensional printing
UR - http://www.scopus.com/inward/record.url?scp=85095568608&partnerID=8YFLogxK
U2 - doi:10.1520/MPC20190201
DO - doi:10.1520/MPC20190201
M3 - Article
SN - 2165-3992
VL - 9
JO - Materials Performance and Characterization
JF - Materials Performance and Characterization
IS - 5
ER -