This paper presents a Manufacturing Execution System (MES) for the composite component manufacturing workshop of an aerospace enterprise. The production process management is the core module of the MES. The system shows the production process management has important effect on the workshop production. The function modules of the production process management are introduced in detail. An improved working flow of the production process for optimizing the traditional production process is emphatically described. Barcode technology is applied to collect the production data and quality inspection data. By scanning the barcode, the real time data information can be collected and data statistic analysis can be done rapidly. The integration relationship between the production process management system and other systems is also introduced. Three-layer structure is adopted to design and develop the system. The developed system has been applied in the composite component manufacturing workshop. The results show that working efficiency of production process management has been improved.

In order to investigate the multi-axial mechanical properties of a kind of PU (polyurethane) foam, some experiments in different loading conditions including uni-axial tension, uni-axial compression, hydrostatic compression and three-point bending were conducted. It is shown that the hydrostatic component influences yield behavior of PU foam, the yield strength and degree of strain hardening in hydrostatic compression exceed those for uni-axial compression. In terms of the differential hardening constitutive model, the evolution of PU foam yield surface and plastic hardening laws were fitted from experimental data. A finite element method was applied to analyze the quasi-static responses of the PU foam sandwich beam subjected to three-point bending, and good agreement was observed between experimental load-displacement responses and computational predictions, which validated the multi-axial loading methods and stress-strain constitutive model parameters. Moreover, effects of two foam models applied to uni-axial loading and multi-axial loading conditions were analyzed and compared with three-point bending tests and simulations. It is found that the multi-axial constitutive model can bring more accurate prediction whose parameters are obtained from the tests above mentioned.