computer based design and development of a digitized corrosion mitigation techniques for riveted joints

The corrosion is the material deterioration by virtue of certain chemical reactions that metals inherently support. The timely detection of the corrosion and its exact type holds an utmost significance in ensuring safe management and maintenance of the components during their life span. The objectiv

Project Title

computer based design and development of a digitized corrosion mitigation techniques for riveted joints

Project Area of Specialization

Mechanical Engineering

Project Summary

The corrosion is the material deterioration by virtue of certain chemical reactions that metals inherently support. The timely detection of the corrosion and its exact type holds an utmost significance in ensuring safe management and maintenance of the components during their life span. The objective of this project is to present a holistic over view of the challenges that exist today in connection to the existing technical gaps. This incorporates a detailed analysis of the threats to structural integrity of an aircraft. Furthermore, it also discusses the corrosion factors, chemical sensors, wireless sensors and optical sensors based on graphene which may prove to be the most helpful aids in corrosion monitoring.To target and detect the corrosion products, the corrosive environments and the approaches to reliable corrosion ensures the timely and enhanced corrosion management. A summary of the corrosion sensing and corrosion determination techniques in addition to the modern technologies for scheduled inspections of the chemical, physical and environmental effects associated with the corrosion is provided. This entails the corrosion sites using detailed mechanical material characterization and takes into account the loss of mechanical properties of corroded samples. The project is expected to present the relation between the gaps in detecting corrosion and managing corrosion in special document of corrosion factors and forms of the Aviation Industry. In addition, certain corrosion sensors will also be explored and discussed that will  give a directional approach towards determining a certain corrosion mitigation technique.

Project Objectives

The lab prepared specimen simulating the component of a aircraft is under consideration. The specimen is riveted joints in the Gun Area of the aircraft. The Al. sheet is layered on which another sheet of Steel alloy has been stretched with the help of steel rivets. The regular and schedule based inspections show case the presence of corrosion on this Gun Area PANEL. Further analysis indicate the failure of these riveted joints under the influence of corrosion, thereby degrading the maintenance and resulting in enhanced down-time of the Aircraft.Corrosion on the metallic Aircraft Structures continues to be an area of concern for the Structural and Material Engineers. The on-going FIND AND FIX technique involves corrosion detection utilizing different detection and sensing equipments. These techniques in addition to the visual inspections consider the mass loss, changes in pH, degradation of coatings and paints and structural defects. However, the unconcerned area remains the restriction of differentiating between corrosion and cracks, the exact determination of corrosion type and the timely detection of the corrosion at early stages. Therefore, the Aircraft Community is moving towards the crack and corrosion based maintenance to ensure that the corrosion detection and management at the earliest stage. The upcoming management regimes are looking forward to cost effective and more efficient corrosion and maintenance of the Aircraft Industry. The key here comes out to be a strong integrated system comprising reliable and durable corrosion sensors and the accuracy in addressing the corrosion conditions.

Project Implementation Method

Determine when and where the corrosion is taking place
• Preservation of corroded components to avoid damaging of corroded parts
at macro and micro level
• Microscopy of the corroded samples (Optical, Stereo, SEM)
• Identifying the materials used at corroded sites
• Acquiring same material for lab experiments
• Preparing joints in lab from materials and rivets actually used on aircraft
• Performing corrosion experiments on prepared samples with and without
salt bath
• Determining rate of corrosion with and without salt bath
• Mechanical testing of the corroded parts.
• Formulation of mitigation technique.

Benefits of the Project

The Expected deliverables of the project are as follows
• Lab experiment of corrosion.
• Rate of corrosion.
• Mechanical testing of corroded samples.
• Mitigation strategy

Technical Details of Final Deliverable

The problem indicated by the project title leads to the more frequent inspections of the Panel of Aircraft. The failed rivets are deriveted and then the panel is riveted again by replacement methods. This entails economic
loss, man power engagement as well as time consumption. In extreme cases, this leads to the unserviceability of the Panel and the whole panel needs to be replaced.The failure of the riveted joints in the Gun Area thus,causes the
Maintenance Engineers and the technicians a hurdle in timely addressing the Mission Readiness of the Aircraft. Therfore, suitable corrosion mitigation technique will increase the serviceability as well as the operational readiness of the Aircrafts.

Final Deliverable of the Project

Hardware System

Core Industry

Manufacturing

Other Industries

Core Technology

Wearables and Implantables

Other Technologies

Sustainable Development Goals

Industry, Innovation and Infrastructure

Required Resources

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