Mode II fracture toughness of carbon-epoxy bonded joints with femtosecond laser treated surfaces

被引：18

作者：

Moreira, R. D. F. ^{[1
,4
]}

Oliveira, V. ^{[2
,3
]}

Silva, F. G. A. ^{[1
,4
]}

Vilar, R. ^{[2
,5
]}

de Moura, M. F. S. F. ^{[4
]}

机构：

[1] INEGI Inst Ciencia & Inovacao Engn Mecan & Engn I, Rua Dr Roberto Frias, P-4200465 Porto, Portugal

[2] Inst Super Tecn, Ctr Phys & Engn Adv Mat CeFEMA, Av Rovisco Pais, P-1049001 Lisbon, Portugal

[3] Inst Super Engn Lisboa, Av Conselheiro Emidio Navarro 1, P-1959007 Lisbon, Portugal

[4] Univ Porto, Dept Engn Mecan, Fac Engn, Rua Dr Roberto Frias, P-4200465 Porto, Portugal

[5] Univ Lisbon, Inst Super Tecn, Av Rovisco Pais, P-1049001 Lisbon, Portugal

来源：

INTERNATIONAL JOURNAL OF MECHANICAL SCIENCES | 2018年 / 148卷

关键词：

Carbon-epoxy bonded joints; Surface treatment; Femtosecond laser; Fracture toughness; Mode II loading; COMPOSITES; ABLATION; BEHAVIOR; RADIATION; REPAIRS; ENERGY; SINGLE; CFRP;

D O I：

10.1016/j.ijmecsci.2018.09.029

中图分类号：

TH [机械、仪表工业];

学科分类号：

0802 ;

摘要：

Mode II fracture toughness of carbon-epoxy bonded joints considering laser treated surfaces was evaluated using the End-Notched Flexure (ENF) test. Four different surface preparations were performed using distinct processing conditions before bonding the specimen arms. The Resistance-curves of the fracture tests were obtained considering an equivalent crack length based procedure. The influence of the different surface treatments on the mode II fracture behaviour was assessed comparing the average values of the fracture toughness. It was verified that a laser treatment employing two interfering laser beams, which produces a complex multi-scale surface morphology free of contaminants, is the best surface preparation regarding higher values of the mode II fracture energy. A cohesive zone analysis was used aiming to validate the followed procedures. The excellent agreement obtained between numerical and experimental results reveals that the used techniques are sound.

引用

页码：707 / 713

页数：7

共 22 条

[21] Direct femtosecond laser surface nano/microstructuring and its applications [J].