A new article published in the « International Research Journal of Engineering and Technology« , Aug-2016.
A Finite Element Method methodology is proposed for fatigue life and failure prediction of automotive steel wheel by the simulations of dynamic radial fatigue test (RFT). A short review of theoretical models, numerical simulation models were described in conjunction with bilinear elasto-plastic finite element stress analysis under wheel rotating loading.
Pour accéder au site : Lamecanique.com
Est-il possible d’effectuer des essais d’étanchéité en mettant en œuvre des ressources moins importantes, tout en conservant la représentativité du fonctionnement des produits ? C’est la question posée par Vallourec, spécialiste des tubes sans soudure pour l’industrie du pétrole et du gaz, aux experts du Cetim, en les chargeant de démontrer la faisabilité d’essais d’étanchéité sur une portion réduite (la zone de connexion) de ses tubes Oil country tubular goods (OCTG).
A paper published in « Case Studies in Engineering Failure Analysis« , available on sciencedirect.com.
Corrosion has always been a problem in the petroleum refining and the petrochemical operations. The equipment of ISOMAX unit, such as reactors, furnace tubes, valves, and pipelines are frequently performed at high temperatures and high pressure condition. This working conditions, accelerates the failures due to corrosion. Therefore, heat- and corrosion-resistant alloys, e.g., austenitic stainless steels, have been widely used in this unit because of their excellent corrosion resistance, mechanical strength and toughness.
This paper describes failure analysis procedure of a cracked high pressure 321 SS RTJ flange in ISOMAX unit. In order to get conclusions related to crack propagation mechanisms of the flange, some investigations were done on the cracked flange that is mentioned in the body of the paper.
A paper published in « Case Studies in Engineering Failure Analysis« , available on sciencedirect.com.
High strength low alloy (HSLA) steel with a nominal composition of 0.15C–1.25Cr–1Mo–0.25V is being extensively used in space programme. Owing to its ease of fabrication and welding, a tank was fabricated out of this alloy. The tank is used to contain strontium per chlorate which on combustion develop secondary thrust, effectively used during attitude control of satellite launch vehicle. During one of the routine qualification tests, a tank had failed at an internal pressure of 109 bar, against a designed proof pressure of 120 bar.
Failure was initiated from long seam weld of a cylindrical shell and propagated into the parent material thereafter. Detailed metallurgical investigation has been carried out to understand the cause of failure. This paper brings out the detail of investigation carried out.
Avec la plateforme d’essais sismiques « Tesseract » inaugurée le 8 novembre 2016 à Bordeaux, le FCBA et le Cetim proposent aux fabricants d’équipements, notamment nucléaires, des moyens inédits alliant simulation et essais sismiques. Pour répondre aux exigences accrues de stabilité des équipements des centrales nucléaires en conditions sismiques suite à la catastrophe de Fukushima, le FCBA (Forêt Cellulose, Bois-construction Ameublement) et le Cetim allient à nouveau leurs expertises
Le Cetim a développé depuis de nombreuses années des compétences spécifiques sur les matériaux composites, plastiques ou élastomères, portées par de grands projets de recherche applicative. Par sa connaissance approfondie des matériaux composites, élastomères, et des procédés qui leur sont associés, le Cetim est le spécialiste français des analyses matériaux, et s’engage pour vous apporter dans les meilleurs délais les éléments nécessaires à la résolution des cas des plus basiques aux plus complexes. La reconnaissance de ses clients, ainsi que la mise en place du centre composite « Technocampus« , de mise en commun de moyens d’analyses, place le Cetim comme un des premiers acteurs du domaine.
A paper published in the « Indian Journal of Science and Technology« , august 2016.
A bellows expansion joint is an assembly of two or more bellows which help to tackle expansion or contraction in the system where it is designed to fit in. It was found, various independent researchers did lot of research in the design and geometry of bellows expansion joint but a review of all is scare, they have put forth the different possible features of bellows design in this paper. (…)
A paper presented at the « International Conference on Processing of Materials, Mineral and Energy », 29th and 30th july 2016, PACE Institute of Technology & Sciences, India. It had been published by Elsevier.
This paper deals with the failure investigations of the first stage gas turbine blade of 30MW gas turbine. This blade is manufacture with of nickel based super alloy IN738. The main focus of the paper is to found the causes of failure of the blade. By the investigations, it is found that the blade failure takes place due to the combined effect of erosion, oxidation, overheating, and hot corrosion.
More at : http://www.pmme.co.in/papers/EMT-087.pdf
An article published in the « International Journal of Engineering Science and Computing », June 2016.
This paper study failure observed in riveted joint in buses and give solution to overcome this failure. In this stress analysis, fatigue analysis of pop up (Blind) riveted joint and Solid riveted lap joints are studied and from that predict the maximum shear strength of riveted joint to resist shear failure and no. of cycles of riveted joints. Also study the behavior of stresses and fracture observed on the Riveted due to stresses. This study is done by CAD software CATIA V5, CAE software Abaqus and correlate with analytical solution.
