Fatigue testing

At AeroNordic we offer fatigue loading up to 500 kN on our servohydraulic equipement.
We have capasity to perform testing under extreme temperatures (-129 deg. C to +315 deg. C) in our large climate chamber.

Contact us today to learn more about our fatigue testing services and how they can benefit your business.

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Other mechanical tests services within AeroNordic Mechanical Tests

 

Fatigue testing is a type of mechanical testing that is used to determine the durability and lifespan of a material or component. This testing simulates the effects of repeated loading and unloading on a material or component and is used to identify potential failure points and predict how long a product will last under real-world conditions.There are a variety of fatigue testing methods that can be used, including tensile, compression, and bend testing. These tests can be performed on a wide range of materials, including metals, plastics, composites and sandwich panels.
Our fatigue testing services can help you ensure the reliability and longevity of your products. We use state-of-the-art equipment and techniques to perform accurate and precise testing. Our experienced engineers will work with you to develop a testing plan that meets your specific needs and provides valuable insights into the performance of your materials and components.

Coating fatigue (ISO 13003)

Coating fatigue is a type of fatigue that occurs in coatings on a high-deflection blade skin. The coating, which are thin layers of material that are applied to the surface of the blade are via adhesion forced to follow the blade as it experiences high levels of strain. Coatings are used for a variety of reasons, including to protect the substrate from the climate and general wear and tear, to enhance its appearance, or to improve its functionality.
Coating fatigue is caused by the repeated stress and strain that is applied to the coating during use. This can cause cracking, flaking, or delamination of the coating, which can lead to reduced performance and reduced lifespan of the coated product. Coating fatigue can be caused by a variety of factors, including thermal stress, mechanical stress, and environmental stress.
There are a variety of testing methods that can be used to evaluate coating fatigue, including bend testing, and cyclic tension. These methods can be used to determine the resistance of coatings to fatigue and to identify potential failure points.
Coating fatigue can be mitigated by selecting coatings that are designed to be more resistant to fatigue and by applying coatings in a way that ensures the fatigue performance. Additionally, coatings can be designed with specific properties like flexibility, toughness and wear-resistance that can help to reduce the effects of coating fatigue.
It’s important to note that coatings are applied to protect the substrate from external factors, and in some cases, it is also important to evaluate the substrate’s fatigue resistance when planning for a fatigue testing. We perform this type of testing regularly and is ready to help you comply with the requirements specific for your product and industry.

Coating fatigue correlation to wind turbine blades

Coating fatigue is an important consideration for wind turbine blades, as these blades are subjected to a wide range of environmental and mechanical stresses during their lifetime. The blades are continually exposed to wind, rain, and other adverse weather conditions, which can cause wear and tear on the coating and the underlying substrate. Additionally, the blades are subjected to a significant amount of mechanical stress as they rotate and bend in response to the wind.
Wind turbine blades are typically made from composite materials, such as fiberglass or carbon fiber, which are coated with a variety of materials to protect them from the elements and improve their performance. These coatings can include paint, gel coats, fillers and sealants.
Coating fatigue is a concern for wind turbine blades because it can lead to cracking, flaking, or delamination of the coating, which can compromise the structural integrity of the blade and lead to reduced performance and reduced lifespan of the turbine.
To mitigate coating fatigue in wind turbine blades, it is important to select coatings that are specifically designed for use in this application. Additionally, the coatings should be applied in a way that minimizes stress and strain on the blade. This can include using multiple layers of coating, providing a flexible barrier layer between the substrate and the coating, and applying the coating in a way that reduces the risk of cracking or delamination.
Wind turbine blades are often tested in a laboratory to simulate the fatigue load they will experience during their lifetime, allowing the engineers to evaluate the coating’s performance and make adjustments before the turbine is deployed.
In summary, coating fatigue is a critical concern for wind turbine blades and proper selection and application of coatings can play a key role in the longevity and reliability of the turbine.

Peel testing – evaluation of the adhesive strength of coatings

Peel testing (ASTM D6862), also known as adhesive tape test (ASTM D3330), is a type of test used to measure the adhesive strength of coatings. It is a destructive test that involves applying a strip of adhesive tape to a coating and then pulling the tape off at a 90-degree angle. The force required to remove the tape is measured and used to determine the coating’s energy release rate (peel strength).
The peel strength of a coating is an important indicator of its adhesion properties, and it can be used to evaluate the coating’s performance and durability. Peel testing can be used to test a variety of coatings, including paint, varnish, and thermal spray coatings.
There are different types of peel testing methods, depending on the type of coating and the material being tested. The most common method is the 180-degree peel test, which is used to measure the force required to remove a strip of tape from the coating. This method is suitable for coatings that have a thickness of less than 1mm. Another common method is the 90-degree peel test, which is used for coatings that are thicker than 1mm.
Peel testing can be performed on a variety of substrates, such as metals, plastics, and composites, and it can be done on a variety of scales, including small coupons, full-size panels, or entire structures. The equipment used for peel testing can vary, but it typically involves a tensile testing machine and a strip of adhesive tape.
Peel testing is a quick and easy way to evaluate the adhesion properties of coatings and it can be used to compare the performance of different coatings or to monitor the performance of a coating over time. However, it’s important to note that peel strength is only one aspect of coating performance, and it should be combined with other tests to fully evaluate the coating’s performance and durability.
In summary, Peel testing is a non-destructive method used to evaluate the adhesion strength of coatings by measuring the force required to remove an adhesive tape from the coating. This test is commonly used to evaluate the performance and durability of coatings and it can be done on different substrates, scales and thickness of the coating.

Coating fatigue Test & Peel Testing

Peel testing can be used to evaluate the adhesion properties of coatings after they have undergone fatigue testing (ISO13003) and/or weathering (ISO12944). Fatigue testing involves subjecting a coating to repetitive loading, which can cause stress and strain on the coating and can potentially lead to coating failure. After the fatigue testing is completed, a peel test can be performed to determine if the coating has failed and to evaluate the degree of adhesion loss.
Peel testing after fatigue loading can provide valuable information about the coating’s performance and durability under realistic loading conditions. By comparing the peel strength of the coating before and after fatigue testing, it’s possible to determine if the coating has degraded and how much adhesion loss has occurred.
It’s important to note that fatigue testing and peel testing are two different types of tests that evaluate different aspects of coating performance. Fatigue testing measures a coating’s resistance to failure under cyclic loading, while peel testing measures the adhesive strength of the coating. Therefore, it’s recommended to combine both tests to get a full understanding of the coating’s performance and durability.
It’s also important to note that the procedure of peel testing should be the same as it was before fatigue testing, to ensure that the results are comparable. It’s also recommended to use the same adhesive tape, the same equipment and the same operator to ensure that the results are accurate and consistent.
In summary, Peel testing after coating fatigue is a way of evaluating the adhesion properties of coatings after they have undergone fatigue testing. By comparing the peel strength of the coating before and after fatigue testing, it’s possible to determine if the coating has degraded and how much adhesion loss has occurred. It’s important to combine both tests to get a full understanding of the coating’s performance and durability and to ensure consistency in the peel testing procedure.