Predicting Impact Damage for Carbon Composite Propeller Certification: Using ASTM D7136 and quasi-static testing to predict component impact damage.

During this research, a new approach to predict impact damage was evaluated using the PAL-V Liberty’s propeller blade as the test subject. The purpose of this research was to provide a simple method for impact damage prediction which will support the certification activities of the PAL-V propeller.<br/>This method involves conducting a threat...

Facilitating adoption of responsible innovation in business through certification

In this paper, we use an economic approach to demonstrate why ‘rational’ businesses are not likely to implement responsible innovation (RI) unless it is economically profitable. The lack of sufficient insights into economic impacts of RI is often induced by information asymmetry. Such asymmetry would hinder consumers who would otherwise be...

Circular Economy in the Maritime Industry: Class notation S.U.R.V. Sustainable Use of Resource Vessel

Many recycled materials in different industries are traceable. The recycled content is often known in percentages. Steel is a material which gets recycled almost 100%. However it is not common practice to specify the recycled content for steel products. From a sustainability point of view this information can be very valuable. This thesis...

Towards a Framework for Certification of Reliable Autonomous Systems

A computational system is called autonomous if it is able to make its own decisions, or take its own actions, without human supervision or control. The capability and spread of such systems have reached the point where they are beginning to touch much of everyday life. However, regulators grapple with how to deal with autonomous systems, for...

Slow-growth damage tolerance for fatigue after impact in FRP composites: Why current research won't get us there

Using the slow-growth certification approach for damage tolerance of composite aircraft structures has the potential to reduce their weight. Applying this approach requires that damage growth is slow, stable, and predictable. However, currently available methods do not allow for sufficiently accurate predictions, due to knowledge gaps related...

Validation of a Risk Application Matrix and Adding Recycling of Scrap Steel to the CERA Raw Materials Certification Scheme

The aim of this master thesis is to improve a raw materials certification scheme by checking and validating the application matrix and the coherent hazards developed for the Certification of Raw materials (CERA) project. The scope of the original application matrix included exploration, mining, physical processing, chemical processing, smelting...

Review on adhesives and surface treatments for structural applications: Recent developments on sustainability and implementation for metal and composite substrates

Using adhesives for connection technology has many benefits. It is cost-efficient, fast, and allows homogeneous stress distribution between the bonded surfaces. This paper gives an overview on the current state of knowledge regarding the technologically important area of adhesive materials, as well as on emergent related technologies. It is...

Towards the Certification of Bonded Primary Fiber Metal Laminate Structures by Bolted Disbond Arrest Features

A new certification approach for bonded primary Fiber Metal Laminate (FML) structures is investigated: using bolts as Disbond Arrest Features (DAF)s to contain the growth of bond line damages so that they can be found and repaired by inspection before becoming critical. By fatigue testing with coupon specimens and model analysis, it has been...

Saving weight and increasing performance by introducing a composite gangway for the Ampelmann system: Creating a producible and certifiable design

With a changing market for offshore crew transfer systems the current Ampelmann systems are vulnerable for competitors. One of the downsides of the current system is its influence on the ship due to the system mass. A lightweight re-design of the current steel gangway using composites could start an overall weight decrease. A composite gangway...

Quality assurance for passive houses

For newly built houses national ambitions prescribe increasing levels of energy performances, even including achieving net zero energy or carbon neutral houses. This is in large contrast with the lack of quality in many building processes. The building regulations, processes and control will have to be reshaped to support these ambitions, taking...

Private sector building control

NLR Contributions to the flutter certification of aircraft with external stores

An outline is given of store flutter clearance activities of the NLR carried out by order of the Royal Netherlands Air Force. Special attention is devoted to the store flutter clearance of the F16 aircraft. Presented at: 7th Aircraft/Stores Compatibility Symposium,Wright-Patterson AFB, Ohio, 8-10 April 1986 and at the 17th Annual Symposium of...