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Overhead Electrical Conductors: Louis Cloutier's legacy

Submitted by Alain Cardou on

I have been asked to give more details on Dr Cloutier's contribution to the field of overhead electrical conductors (power transmission lines) mechanics. I just received the attached document, written by one close colleague of his, Dr. Claude Hardy, who retired from IREQ, Hydro-Quebec research branch. A nice tribute to Louis Cloutier's legacy.

Durability of photovoltaic laminates: mechanical, economical and societal impacts

Submitted by marco.paggi on

Mechanicians interested in interdisciplinary research on composites for photovoltaic energy applications, please download the free reports for policy makers and photovoltaic companies published by the Task 13 of the International Energy Agency: 

http://mailchi.mp/c40cfc488823/iea-pvps-newsletter-pv-power-update-39?e…

 

The ERC Starting Grant CA2PVM is glad to have contributed to this outreach activity, see:

In Memoriam: Dr Louis Cloutier (1936-2017)

Submitted by Alain Cardou on

My friend and former colleague, Dr. Louis Cloutier, passed away on February 26. A long time Hydro-Quebec engineer, among other achievements, he will be remembered for his major contribution to the solution of electric power transmission mechanical problems, most notably to Aeolian vibration control, and related conductor fatigue.

CABLE UNDER AXIAL LOADING: AN ANALYTICAL MODEL

Submitted by Alain Cardou on

The classical problem of a cable under axial load has been revisited by Weiguo Wu and Xin Cao: Mechanics model and its equation of wire rope based on elastic thin rod theory, International Journal of Solids and Structures, in press, 9 pages. On line 22 october 2016 at http://www.sciencedirect.com/science/article/pii/S0020768316303122 .

Model is applied to a multistrand ccable given in a book by Costello (1990). Axial stiffness results compare very well.   

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OVERHEAD ELECTRICAL CONDUCTORS IN BENDING : A SEMI-CONTINUOUS MODEL

Submitted by Alain Cardou on

As indicated in the review by Cardou & Jolicoeur (1997), and depending on the application, a helically stranded system may be modelled using a semi-continuous approach whereby each layer is replaced by a continuous helical orthotropic material. For those able to read Russian, this approach is presented in a paper by Danilin & Al. specifically oriented towards Overhead Electrical Conductor mechanics: “Modelling of Deformation of Wire Spiral Structures” published in the PNRPU Mechanics Bulletin (2015, No 4, pp. 72-93).

OVERHEAD ELECTRICAL CONDUCTORS IN BENDING : NEW TEST DATA

Submitted by Alain Cardou on

A paper by Kubelwa et al. (Statistical Modelling of Bending Stress in ACSR Overhead Transmission Line Conductors subjected to Aeolian Vibrations –I) reports data from vibration tests on 4 ACSR.  under  3 axial loads (20, 25 and 30% UTS). An 84.5 m conductor span is vibrated at various bending amplitudes and strain is measured near a clamped end (distance not given). Clamps are rigid square-faced bushings. Vibration amplitude is measured at 89 mm from bushing. Strain gages are glued on 3 adjacent top layer wires. Through Hooke’s law, mean stress is derived for each amplitude.

Asking for help in BAJA SAE Car

Submitted by Marwan Shehata on
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Hello,I've joined a racing contest for Off-Road cars , called Baja SAE ( Society of Automotive Engineers)

The car contains tubes that are welded together or attached together by flanges

I am familiar with Abaqus and ANSYS btw

What are the main aspects that we should consider in modeling and simulating a baja sae car ?

Can you help me with this?

Overhead Electrical Conductor in bending: Papailiou's model revisited

Submitted by Alain Cardou on

 In a paper to appear and available online,( An analytical approach to model the hysteretic bending behavior of spiral strands, Applied Mathematical Modeling 2016, http://www.sciencedirect.com/science/article/pii/S0307904X16300592 )

Cable bending stiffness: new test data

Submitted by Alain Cardou on

A new paper by Chen et al.: Experimental research on bending performance of structural cable. In: Construction and Building Materials, 15 October 2015, Vol. 96, pp. 279-288. Equivalent bending stiffness has been obtained applying a force at midspan of simply supported, about one meter long, specimens. A number of tensile force levels have been applied (including zero). Non-linear force-deflection curves are shown.