Issue 38

F. Majid et alii, Frattura ed Integrità Strutturale, 38 (2016) 273-280; DOI: 10.3221/IGF-ESIS.38.37 273 Focussed on Multiaxial Fatigue and Fracture Pressure vessels design methods using the codes, fracture mechanics and multiaxial fatigue Fatima Majid, Jilali Nattaj, Mohamed Elghorba University of Hassan II, National Superior School of Electricity and Mechanics Casablanca (ENSEM) LCCMMS majidfatima9@gmail.com , http://orcid.org/0000-0001-8909-8232 A BSTRACT . This paper gives a highlight about pressure vessel (PV) methods of design to initiate new engineers and new researchers to understand the basics and to have a summary about the knowhow of PV design. This understanding will contribute to enhance their knowledge in the selection of the appropriate method. There are several types of tanks distinguished by the operating pressure, temperature and the safety system to predict. The selection of one or the other of these tanks depends on environmental regulations, the geographic location and the used materials. The design theory of PVs is very detailed in various codes and standards API, such as ASME, CODAP ... as well as the standards of material selection such as EN 10025 or EN 10028. While designing a PV, we must design the fatigue of its material through the different methods and theories, we can find in the literature, and specific codes. In this work, a focus on the fatigue lifetime calculation through fracture mechanics theory and the different methods found in the ASME VIII DIV 2, the API 579-1 and EN 13445-3, Annex B, will be detailed by giving a comparison between these methods. In many articles in the literature the uniaxial fatigue has been very detailed. Meanwhile, the multiaxial effect has not been considered as it must be. In this paper we will lead a discussion about the biaxial fatigue due to cyclic pressure in thick-walled PV. Besides, an overview of multiaxial fatigue in PVs is detailed. K EYWORDS . Pressure vessel design; ASME VIII; Multiaxial fatigue; Fracture mechanics; Cumulative damage. Citation: Majid, F., Nattaj, J., Elghorba, M., Multi-purpose fatigue sensor. Part 2. Pressure vessels design methods using the codes, fracture mechanics and multiaxial fatigue, Frattura ed Integrità Strutturale, 38 (2016) 273-280. Received: 15.05.2016 Accepted: 20.06.2016 Published: 01.10.2016 Copyright: © 2016 This is an open access article under the terms of the CC-BY 4.0, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited. I NTRODUCTION he pressure vessels (PV) are among the most used storage means in many industries, particularly in the Ammonia, Gas, Petrochemical industries. They may be cylindrical, spherical depending on the nature of the stored product, its environment and its use. The PVs are more complex in design and safety component management. They are T