Composite number

Engineering

Materials science

Shear (geology)

Ultimate tensile strength

Computer science

Visual arts

Mechanical engineering

Organic chemistry

Mathematics

Geometry

Composite material

Structural engineering

Chemistry

Tension (geology)

Sizing

Homothetic transformation

Composites Part A Applied Science and Manufacturing

In the framework of the E-U program ALCAS (Advanced Low-Cost Aircraft Structure), a new Z-pinning technique was developed by EADS Innovation Works. This technology was used to manufacture low-cost Z-pinned junction demonstrators (L and T shaped specimens) typical of aeronautical structures. In order to understand load transfer mechanisms in this kind of assembly, a multi-level analysis was performed. In the first part of this study, tension and shear pin behaviour was investigated as well as pin pull-out from neat resin or laminate. An analytical model was proposed to predict the maximum load capability of a single pin for an insertion depth of less than 8 mm which correspond to the usual technology. Now, in this second part, we demonstrate that the behaviour of the junction under pull-out, shear and unfolding is globally homothetic to the mechanical behaviour of a pin. This study provides the basis for a pre-sizing methodology for Z-pinned junctions under complex loading.

Multi-level analysis of low-cost Z-pinned composite joints