Fatigue and Damage Tolerance DTR for the metallic structures of the A350XWB Cargo Door Surrounding. Under this role, the performed tasks are as follows:1) Coordination of the numerical activities performed by the external suppliers.2) Confirmation that the technical content has been generated using the appropriate Airbus’ methods,procedures and policies.3) Verification that the technical content meets the applicable performance, safety, quality andairworthiness requirements.4) Endorsement of the responsibility of the technical content.

Within the frame of the fixed-wing aircraft projects A350XWB, A380, Single Aisle (A320 family, A320neo family), Long Range (A330, A330neo), the following activities were performed:1) Analysis and validation of metallic and composite structures for Fatigue and Damage Tolerance using Airbus methods, to assess design solutions from concept and structural development to certification and in-service maintenance.2) Coordination of the numerical activities with the external suppliers.3) Generation of FEA models based on engineering and manufacturing requirements by means of HyperMesh and Patran.4) Interpretation and post-processing of numerical results obtained via implicit linear and non-linear analyses (Nastran, Abaqus).5) Sizing of the structural components, parts and assemblies from fatigue point of view.6) Definition of fatigue loading spectra.7) Determination of fatigue allowable stress levels for dimensioning.8) Selection of manufacturing technologies, materials and standards.9) Definition of inspection programs based on fracture mechanic approaches.10) Definition and establishment of the certification/qualification fatigue documents, including also acoustic fatigue, windmilling, structural repair manuals.11) Fatigue test definition, support and analysis of the tests.Additionally, one of the main activities is the development and validation of advanced numerical tools to calculate the fatigue life of metallic parts in riveted areas, bolted joints, notches and fillets.Within the frame of helicopter projects (BK117, H135), analyses and validation of the rotor dynamic systems including blades, main rotor, main gear box, hydraulic actuators, engines, tail rotor and tail gear box are performed to assess design, repair and in-service solutions (concessions, daily repair request, major incident technical board).

Fatigue and Damage Tolerance focal point for the project A350XWB, responsible of fatigue and damagetolerance analyses of the metallic parts of the lower deck cargo doors. The main activities consisted of:1) Creation and supervision of fatigue, windmilling and acoustic fatigue certification reports.2) Development of methods and processes to be used for the fatigue and crack propagation calculation.3) Coordination of the numerical activities with the external suppliers.4) Support to the approval phase and active collaboration in Design-to-Cost activities.Within the frame of the aerospace projects A380, Single Aisle, Long Range, the following activities wereperformed:1) Fatigue and damage tolerance analysis, windmilling analysis, acoustic fatigue analysis and creation ofthe relevant certification/qualification fatigue documents.2) Fatigue and damage tolerance analysis performed for the Structural Repair Manual (SRM) of thePassenger Doors of the A380-800.

Development of FE models to simulate progressive failure on composite structures. Nonlinear code Abaqus/Standard and Abaqus/Explicit are exploited in order to simulate:1) low-velocity impact2) three-point bending3) compression after impactExperimental tests on composite aerospace structures, in order to characterize carbon/epoxy and glass/epoxy composites. Tests include: 1) four-point bending tests;2) double cantilever beam tests (both static and fatigue)