Failure of polyamide 12 notched samples manufactured by selective laser sintering

被引：3

作者：

Crespo, M. ^{[1
]}

Gomez-del Rio, T. ^{[1
]}

Rodriguez, J. ^{[1
]}

机构：

[1] Univ Rey Juan Carlos, Escuela Super Ciencias Expt & Tecnol, Grp Durabilidad & Integridad Mecan Mat Estruct, DIMME, C Tulipan S-N, Madrid 28933, Spain

来源：

JOURNAL OF STRAIN ANALYSIS FOR ENGINEERING DESIGN | 2019年 / 54卷 / 03期

关键词：

Polyamides; fracture toughness; notches; additive manufacturing; CRITICAL DISTANCES;

D O I：

10.1177/0309324719847817

中图分类号：

TH [机械、仪表工业];

学科分类号：

0802 ;

摘要：

Fracture resistance of polyamide 12 was measured with tensile tests on notched specimens with different notch tip radii. The specimens were processed by additive manufacturing techniques, and the tests were carried out in two different orientations to evaluate the potential anisotropy of the material. Finite element analysis was performed to know the stress state of the whole specimen. Then, the failure of the specimens was described using the theory of critical distances. The influence of possible manufacturing defects in the material was incorporated using a probabilistic approach, associated with a Weibull distribution. A fractographic analysis of the post-mortem specimens allowed to identify those mechanisms responsible for the material failure in each orientation.

引用

页码：192 / 198

页数：7

共 17 条

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[Anonymous], D638032003 ASTM

[2]

[Anonymous], 2007, THEORY CRITICAL DIST, DOI DOI 10.1016/B978-0-08-044478-9.X5000-5

[3]

[Anonymous], F279212A2013 ASTM

[4] Assessment of notched structural components using Failure Assessment Diagrams and the Theory of Critical Distances [J].