Enhanced Tensile Properties and Damage Tolerance of an Unconventional Composite Bolted T‐Joint by Load‐Carrying Laminated Beams DOI
Zhitao Luo, Tao Zhang,

Haisheng Wu

et al.

Polymer Composites, Journal Year: 2025, Volume and Issue: unknown

Published: May 20, 2025

ABSTRACT Improving the tensile performances of composite out‐of‐plane joints like T‐joints has always been a key focus for connection structures. Based on unconventional configuration design bolted T‐joints, consisting an internal laminated skeleton and external skin, load‐carrying beams were incorporated both sides lug skeleton, prepreg‐resin transfer molding (RTM) co‐curing process was improved in this study. Subsequently, tests conducted new T‐joints. The results indicate that T‐joint exhibits excellent performances, with proportional limit load ultimate by 29.37% 68.34%, respectively, compared to original T‐joint. Its specific elastic stiffness reach 130.92% 260.99% same‐sized 2A12 aluminum main failure modes become large‐scale skin delamination around bolt holes base panel, more diverse damage progression paths, thereby improving tolerance capability joint. Additionally, since at junction between corner area panel represents non‐negligible initial damage, it can be judged whether joint is within linear segment according strain change zone.

Language: Английский

Enhanced Tensile Properties and Damage Tolerance of an Unconventional Composite Bolted T‐Joint by Load‐Carrying Laminated Beams DOI
Zhitao Luo, Tao Zhang,

Haisheng Wu

et al.

Polymer Composites, Journal Year: 2025, Volume and Issue: unknown

Published: May 20, 2025

ABSTRACT Improving the tensile performances of composite out‐of‐plane joints like T‐joints has always been a key focus for connection structures. Based on unconventional configuration design bolted T‐joints, consisting an internal laminated skeleton and external skin, load‐carrying beams were incorporated both sides lug skeleton, prepreg‐resin transfer molding (RTM) co‐curing process was improved in this study. Subsequently, tests conducted new T‐joints. The results indicate that T‐joint exhibits excellent performances, with proportional limit load ultimate by 29.37% 68.34%, respectively, compared to original T‐joint. Its specific elastic stiffness reach 130.92% 260.99% same‐sized 2A12 aluminum main failure modes become large‐scale skin delamination around bolt holes base panel, more diverse damage progression paths, thereby improving tolerance capability joint. Additionally, since at junction between corner area panel represents non‐negligible initial damage, it can be judged whether joint is within linear segment according strain change zone.

Language: Английский

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