Size Effect on Strength of Hybrid Metal-Composite Joints

Author(s):  
Zdenek Bazant ◽  
Ferhun Caner ◽  
Jia-Liang Le ◽  
Qiang Yu
Author(s):  
Zdeneˇk P. Bazˇant ◽  
Jia-Liang Le ◽  
Ferhun C. Caner ◽  
Qiang Yu

Metal-composite joints between steel ribs and advanced fiber-polymer composites are an effective structural system for hybrid ship hulls. Similar joints are of interest for fuel-efficient aircraft. The current designs of such joints are generally based on the strength criterion, which ignores fracture mechanics. Aimed at an efficient and reliable design, this study investigates the size effect on the strength of these joints theoretically, numerically and experimentally. The analytical formulation of the size effect is asymptotically anchored at the large-size limit in linear elastic fracture mechanics (LEFM). The bi-material corner of the joint is shown to have a singular stress field with complex singularity. The strength of the joint is determined by the energy criterion for the macrocrack initiation at the corner, from which the large-size asymptote of the size effect law has been derived. A general approximate size effect law, spanning all sizes and various joint angles, is further derived via asymptotic matching. Numerical analysis with cohesive fracture model is used to design the experiments. Experimental studies involve the testing of geometrically similar hybrid joint specimens with the size ratio of 1 : 4 : 12. The analytical, numerical and experimental studies all indicate that the strength of bimaterial metal-composite joints is subjected to a strong size effect.


2013 ◽  
Vol 44 (4) ◽  
pp. 559-573
Author(s):  
Yanina Stefanovna Borovskaya ◽  
Vyacheslav Ivanovich Grishin ◽  
Irakliy Nugzarovich Kacharava ◽  
Sergey Mikhaylovich Naumov

Metals ◽  
2017 ◽  
Vol 7 (7) ◽  
pp. 275 ◽  
Author(s):  
Huixia Liu ◽  
Wenhao Zhang ◽  
Jenn-Terng Gau ◽  
Zongbao Shen ◽  
Youjuan Ma ◽  
...  

2014 ◽  
Vol 118 ◽  
pp. 250-256 ◽  
Author(s):  
P.N. Parkes ◽  
R. Butler ◽  
J. Meyer ◽  
A. de Oliveira

Mechanik ◽  
2020 ◽  
Vol 93 (11) ◽  
pp. 6-9
Author(s):  
Daniel K. Dębski ◽  
Krzysztof M. Gołoś ◽  
Marek A. Dębski

The paper presents the concept, technology of manufacturing and assembly of a new metal-composite-metal joint. The presented joint can be used in many constructions, especially in lightweight supporting structures. The research of the strength properties of the analysed composite joints of load-bearing structures is also presented.


2020 ◽  
Vol 253 ◽  
pp. 112769
Author(s):  
Karthik Ramaswamy ◽  
Ronan M. O'Higgins ◽  
Michael C. Corbett ◽  
Michael A. McCarthy ◽  
Conor T. McCarthy

2007 ◽  
Vol 23 (02) ◽  
pp. 72-81
Author(s):  
Mark Smith ◽  
Parsaoran Hutapea

Recently, many nations along with private shipbuilders have begun developing large maritime vessels using composite materials structurally. Concurrently, the US Navy has a need for research on bonded metal-composite joints. For these reasons, a literature review was conducted to establish a fundamental knowledge base of adhesive bonding and failure theories along with surface cleaning and engineering processes that would be valuable for metal-composite joint designs. It is believed that by understanding bonding and failure fundamentals, optimal surface characteristics can be targeted. Furthermore, by knowing the available cleaning and surface engineering processes, in conjunction with understanding their resulting surface topographies and compositions, creative and novel joints can be designed. This report provides the results of the literature review performed, which serves as a platform for future research aimed at optimizing bonded joints for use in naval applications.


2019 ◽  
Vol 55 (5) ◽  
pp. 655-666
Author(s):  
G. Beketova ◽  
M. Shevtsova ◽  
V. Symonov

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