New fatigue model leads to more durable ships

April 23, 2013
New fatigue model leads to more durable ships

Heikki Remes at the Aalto University School of Engineering, Department of Applied Mechanics, has developed a model making it possible to determine how fatigue sets in with various welded steel materials. The model allows for the development of lighter structures, and as a consequence, more energy-efficient ships.

"By utilising modern manufacturing technology and new materials, it is possible to achieve more efficient structures than the ones that currently exist. In addition, better physical models are needed to ensure structural strength," Remes says.

At present the measurements used by classification societies are based on the average quality of the weld. The same design guideline is used both with traditional and more advanced structures. However, through the development of manufacturing technology, it is possible to achieve characteristics for welded joints that are significantly better than average. With the models that have been developed, it is possible to consider the difference between traditional and advanced structural joints and the impact on fatigue resistance.

The study has been published in the International Journal of Fatigue. The findings of the study can be used extensively in establishing models for fatigue endurance of various developed welded . The goal is to predict fatigue endurance more accurately and to utilise material in the final product more efficiently.

The work is linked with a project of the Academy of Finland on fatigue in thin sandwich panel structures and with the BESST EU project to promote the competitiveness of the European shipbuilding industry. Also under preparation are national development projects within the Finnish Metals and Engineering Competence Cluster (FIMECC). The work also supports the national maritime industry research strategy commissioned by the Federation of Finnish Technology Industries.

Explore further: High-strength material advancements may lead to new, life-saving steel

More information:

Related Stories

New process to prevent cold cracking in high-strength steel

September 6, 2012

Cold cracking in high-strength steel presents major quality assurance challenges for the automotive and machine-building industries, since cracks are difficult to predict – until now. A new process can determine, as early ...

Nurse-led monitoring improves cancer-related fatigue

January 4, 2013

(HealthDay)—For patients with advanced cancer, nurse-led monitoring and optimized treatment of physical symptoms significantly improves cancer-related fatigue, according to research published online Jan. 2 in the Journal ...

Recommended for you

Making energy-harvesting computers reliable

October 28, 2016

A revolutionary and emerging class of energy-harvesting computer systems require neither a battery nor a power outlet to operate, instead operating by harvesting energy from their environment. While radio waves, solar energy, ...

Microsoft aims at Apple with high-end PCs, 3D software

October 26, 2016

Microsoft launched a new consumer offensive Wednesday, unveiling a high-end computer that challenges the Apple iMac along with an updated Windows operating system that showcases three-dimensional content and "mixed reality."


Please sign in to add a comment. Registration is free, and takes less than a minute. Read more

Click here to reset your password.
Sign in to get notified via email when new comments are made.