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This paper's aim is to focus on the design, manufacture and test of a stiffened panel in composite material with integrated longitudinal foam‐filled stiffeners, spar and…
This paper's aim is to focus on the design, manufacture and test of a stiffened panel in composite material with integrated longitudinal foam‐filled stiffeners, spar and rib caps, using one‐shot liquid infusion (LI) process, reducing weight and number of subparts respect to metallic reference baseline P180 Avanti vertical fin.
Extensive activities in computational applications in order to improve the efficiency of the design process finite element analysis/structural sizing codes have led to an optimised engineering design process that resulted in a successful stiffened carbon fibre reinforced polymer panel design in terms of weight and number of parts with respect to the metallic baseline.
The composite panel has fulfilled all the design requirements (reduction of mass and number of parts with respect to the metallic reference baseline) overcoming the certification static test, and confirming the reliability of the theoretical analyses.
The composite aircraft components, conceived as unitized structure by one‐shot process, guarantee not only a mass reduction, compared to aluminium components, but assure also the reduction of the number of subparts and of the assembly process cycle time. On the other hand, the LI technology implies the development of more specific and advanced techniques to control the manufacturing and the weight.
The stiffened panel is the most used component in the aircraft structures; the solution shown in this work can find applications in many parts of an aircraft.
The results obtained in this work can be useful to those who work in aeronautical structural departments with the aim to reduce weight and subparts of the airframe.
The main objective of this work is to assess the current capabilities of different commercial finite element (FE) codes in simulating the progressive damage of composite…
The main objective of this work is to assess the current capabilities of different commercial finite element (FE) codes in simulating the progressive damage of composite structures under quasi-static loading condition in post-buckling regime.
Progressive failure analysis (PFA) methodologies, available in the investigated FE codes, were applied to a simple test case extracted from literature consisting in a holed composite plate loaded in compression.
Results of the simulations are significantly affected by the characteristic parameters needed to feed the degradation models implemented in each code. Such parameters, which often do not have a physical meaning, have to be necessarily set upon fitting activity with an experimental database at coupon level. Concerning the test case, all the codes were found able to capture the buckling load and the failure load with a good accuracy.
This paper would to give an insight into the PFA capabilities of different FE codes, providing the guidelines for setting the degradation model parameters which are of major interest.
The purpose of this paper is to add understanding to whether the supply chain (SC) of ancient grains, einkorn in particular, may activate the virtuous mechanisms that…
The purpose of this paper is to add understanding to whether the supply chain (SC) of ancient grains, einkorn in particular, may activate the virtuous mechanisms that enable pursuing a new equilibrium based on relationships and joint interests.
This study adopts the single case study as a methodological approach. More precisely, it focusses on the SC of ancient grains in Piedmont (Italy) examining in detail Mulino Marino. Interviews with the management of this single player and to some farmers’ local associations were carried out.
The einkorn SC in Piedmont Region is an interesting case of short, local and direct SC because it aims at delivering a product that is more sustainable in terms of production, nutritional values and properties. In addition, this study confirms previous studies according to which for an effective supply chain management (SCM) it is important to implement the following conditions: the right equilibrium among SC players’ physiologically conflicting interests, players’ integration and transparent information among all the SC stakeholders, including final consumers.
The study offers implications for food managers involved in the (short) SCM.
Elements of originality can be identified in this research to the extension of studies on SCM in the ancient grains industry.