Composite News

JEC Composites Connect on 01+02 June 2021

For the first time in its history, the world’s most successful trade fair for composites and fibre-plastic composites JEC Paris presents itself as an online event. Due to the ongoing Covid 19 pandemic, the successful format will take place as a digital trade fair. JEC Composites Connect will remain an online meeting place for the entire composites community. This first JEC Composites Connect will function like a conventional trade fair: With digital exhibition stands, a conference programme, networking areas and the JEC Group Innovation Programme.

Grasse Zur Composite Testing is taking part in this online event and presenting all the latest news on the testing of fibre-reinforced plastics. In addition, the proven US-Plus technology for non-contact process control will be the focus of the exhibition. Book a personal appointment today and get in touch with us. Participation in the digital trade fair is free of charge.

Registration



Composite News

LOX test rig for rocket fuel tanks made of CFRP

Together with MT Aerospace, Grasse Zur Composite Testing has developed a test rig for LOX („liquid oxygen“) testing. The main goal of the Phoebus project is to increase the payload performance of the launcher by more than two tonnes by reducing the mass of the upper stage through a new design and lighter materials. At the same time, Phoebus also aims to reduce production costs.

Carbon-fibre reinforced plastic (CFRP) materials, or carbon composites, allow new architectures and combinations of functions otherwise not possible using metallic materials. CFRP is lightweight and dark in appearance and will be used for the cryogenic propellant tanks as well as primary and secondary structures of Phoebus, hence the name ‘black’ upper stage. Furthermore, their manufacturing process allows for an integrated layout that results in fewer parts compared to a comparable metallic configuration, thereby reducing production and assembly costs.

With the help of the test rig developed by Grasse Zur Composite Testing, the CFRP tanks are cooled down to approx. -180 °C. The CFRP tanks are then subjected to an internal pressure via a fully remote-controlled system. Four independently switched impact pendulums realise the application of impacts on the upper and lower end cap of the tank („boss“). The tests, which were carried out at an open-air test site in Germany, show that lightweight, carbon fibre reinforced plastic is strong enough to replace metal used in upper-stage rocket structures. This is an important milestone in Europe for the development of a prototype of a highly-optimised ‘black’ upper stage, Phoebus, a joint initiative by MT Aerospace and ArianeGroup, funded by ESA’s Future Launchers Preparatory Programme.

Further information



Composite News

Christmas 2020

A turbulent and changeable year is drawing to a close. This year will remain a special memory for many of us, whether due to personal hardships, worries about an uncertain future, or even the many hours spent in the home office. The whole team of Grasse Zur Composite Testing would like to thank its clients and partners for the successful and trustful cooperation. We wish you a successful final spurt for the last days of 2020 and all the best for the new year.

This year our company vacations will start from 23 December 2020. In the new year you will reach us again from 04 January 2021. And as always: For all questions concerning the testing of plastics and composites we are always at your disposal!

Demo Image



Composite News

Non-contact process control using the pulse-echo method

Grasse Zur Composite Testing develops together with DLR e.V. a non-contact process control using the pulse-echo method as part of a ZIM research project funded by BMWi. Due to the increasing networking of control and plant systems, real-time information on the curing process is of increasing interest in the processing of fibre-reinforced plastics.

The GZ US-Plus® non-contact process control system has been successfully represented on the market for about twenty years. Compared to competing methods such as di-electric analysis (DEA), it has the advantage of being able to measure without direct contact to the manufactured component. The ultrasonic-based system uses a piezo sensor to emit sound waves that are received by a second sensor. A computer calculates the curing process from the running time. This method of process control is particularly important for the aerospace industry, since no holes have to be drilled into the moulds and thus the elaborately machined surfaces of the closed moulds are not damaged.

The limitations of the previous reference technology become apparent in the case of rotor blades of wind turbines. These components are manufactured in open-mold construction and are nowadays up to 80 m long. Under the often harsh production conditions, it is not possible to measure the curing in transmission by means of two sensors (transmitter and receiver). Practical experience shows that only a permanently installed sensor system, which does not hinder but supports the workflows in production, can be implemented in production.

For this reason, the development of OPtimus® was initiated, in which the curing control is realised by means of a coupled transmitter-receiver unit using the pulse-echo method. This technology eliminates the need for a second sensor, which is why the sensor system can remain permanently integrated in the mold. This enables both an enormous increase in efficiency during curing and a guarantee of networking within the scope of QA. Flow front detection is also the current development status, which is expected to be ready for the market in 2022.



Composite News

Test methods for determining the intralaminar shear properties of FRP

In cooperation with Composites United the webinar “Test methods for determining the intralaminar shear properties of fibre-plastic composites” took place on 19 May 2020. Dr. Fabian Grasse went into detail about the characterisation of the shear properties of FRP.

Various test methods have been established for determining the intralaminar shear properties of FRP. These differ in the geometry of the test specimens and the type of load application, which means that different testing devices are used. This webinar will introduce the most widely used standards for the determination of shear characteristics (DIN EN ISO 14129, DIN EN ISO 20337, ASTM D5379 and ASTM D7078) and go into detail about the various advantages and disadvantages of the respective test methods.

Link to the webinar



Composite News

Strain gauge connection kit GZ DMS-2/3 for use with strain gauges

The strain gauge connection kit GZ DMS-2/3 is used together with universal testing machines. It is used to connect the strain gauge of the specimen to the testing machine. For this purpose, a Wheatstone bridge is required to record the small ohmic resistance changes that occur locally in the strain gauge when the specimen is strained. In the universal testing machine these resistance changes are converted into strains.

The strain gauge connection kit GZ DMS-2/3 is characterised by a very user-friendly design. It consists of two or three long-life connection terminals for connecting the strain gauges in 2-wire or 3-wire technology, which guarantee reliable contacting of the strain gauge conductors. The cable to the testing machine is connected to the strain gauge connection box via an Amphenol socket. For the Wheatstone bridge, high-quality and selected supplementary resistors are used. The strain gauge connection box is attached to the frame of the universal testing machine via magnetic feet.

Further information



Composite News

JEC World from 03 to 05 March 2020 in Paris

This year, we are again exhibiting at the internationally most important leading trade fair for fibre-reinforced plastics and composites. The JEC World takes place from 03 to 05 March in Paris. You will find us at the joint stand of Composites United in Hall 6 / Stand F85 + G85.

You can get a free ticket here. The invitation code is ENV629613576. You are welcome to forward this newsletter or the link to interested colleagues.

This year we would like to inform you about the latest developments of our testing services at the exhibition. In particular our accreditation according to ISO 17025 and the transit to the current version will be in the foreground. In addition, the fair will focus on our online process control GZ US-Plus, which has been successfully used for over twenty years and is the only process control on the market capable of contactless measurement.

We look forward to your visit!



Composite News

Partnership between Code Product Solutions and Grasse Zur Composite Testing

Code Product Solutions is an international, independent provider of engineering and consulting services. The company provides solutions for products made of plastics, composite materials and metals. Code Product Solutions relies on accurate computational simulations for mastering challenges long before the first prototypes become available. Reliable material measurements are essential for their approach.

The complexity of the mechanical behavior of composite laminates also means that characterisation is difficult. Therefore, Code Product Solutions works closely together with Grasse Zur Composite Testing to obtain accurate measurement data for non-linear anisotropic material models with failure behavior.

Further information



Composite News

Composites Europe from 10 to 12 September 2019 in Stuttgart

This year, for the first time in seven years, we are not represented with our own stand at Composites Europe. Nevertheless, you have the opportunity to speak personally on site with the Grasse Zur Composite Testing team about material testing on fibre-reinforced plastics, testing services in our ISO 17025 accredited testing laboratory or reference test fixtures such as the picture frame.

Simply select an appointment from the list. You will then receive a confirmation email.

We are looking forward to a personal conversation!



Composite News

Material tests before summer break 2019

We are happy to carry out material tests on fibre-reinforced plastics for you in our ISO 17025 accredited test laboratory, even during the summer break. So you can go on holiday with peace of mind and the test results will be on your desk afterwards. Our experience shows that the number of incoming orders increases considerably after the summer holidays, which can lead to delays in order processing. Therefore we would like to give you some references in own thing.

  • The Grasse Zur team does not take company holidays and is always available for you during the summer.
  • Incoming orders are processed in the order in which they are received. For this reason, it is advantageous to place an testing order even if the material to be tested is not yet available. This allows us to better schedule the tests and procure the necessary aids in good time, such as ordering strain gauges.
  • We are always at your disposal for all questions concerning composite testing.

Contact us simply and without obligation, we will be happy to advise you!

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