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Overhead Electrical Conductors: Louis Cloutier's legacy

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.

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Durability of photovoltaic laminates: mechanical, economical and societal impacts

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:


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

In Memoriam: Dr Louis Cloutier (1936-2017)

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.


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 .

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

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A treasury of college works

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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.


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.

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Asking for help in BAJA SAE Car

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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 ?
BAJA SAE Car to be made

Can you help me with this?

Overhead Electrical Conductor in bending: Papailiou's model revisited

 In a paper to appear and available online,( An analytical approach to model the hysteretic bending behavior of spiral strands, Applied Mathematical Modeling 2016, )

Cable bending stiffness: new test data

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.

Overhead Electrical Conductor fatigue testing: a new standard

The International Electrotechnical Commission (IEC) just released a new international standard titled: "Overhead lines - Method for fatigue testing of conductors". IEC 62568. Edition 1.0 2015-07. . It closely follows previous CIGRE and EPRI publications on this topic:

CIGRE SC B2 WG11 TF7 "Fatigue Endurance Capability of Conductor/Clamp Systems - Update of Present Knowledge" CIGRE TB 332, 2007, Paris.

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Seismic Evaluation of Petroleum Storage Tank

I´m doing a plastic collapse evaluation as per API 579-1 Appendix B1, and one of the load cases is Earthquake loads. 579 refers to ASCE 7, which for tanks refers to API 650 Appendix E. The approach in 650 is a static equivalent lateral force seismic analysis where you find equivalent lateral forces and moments according to some likely earthquake spectrum. It seems that what you do is apply these at the top of the tank shell, which mimics the overturning and shear behavior, assuming the tank doesnt slide from inertia. 

How to calculate Impedance (Electrical output variables) in a basic Piezoelectric modelling

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Hello All,

I am a relatively new user to Abaqus. I am working on piezoelectric steady state dynamic analysis of a transducer. Currently I only have a cuboid piezo transducer. My main aim now is to get the Impedance values for a given input voltage. I am exciting the transducer at a frequency of 1 kHz. I would use the relation of Z = Input voltage / Output current.

Door closing effort

Hello everybody,

A cable bending stick-slip analytical model

Single strand cable bending, stick-slip, analytical models require that a choice be made between two contact modes between adjacent wires: either radial (between layers) or lateral (between same layer wires). In most recent models (e.g. Papailiou’s) radial contact is selected. A “lateral contact” model has been presented by Panetti in 1944 and can be found in the proceedings of the Turin Royal Academy of Science. A translated version from Italian is proposed in the attached file.

Reservoir Modeler. Eclipse to Abaqus. Geomechanical Coupling

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Hello, Everybody, who is studing reservoir geomechanics,

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The Cable Connection – Choosing the Perfect Lifeline for Your Machines

With the availability of different brands and grades of cables in the market, it can be pretty challenging to narrow down the options to a few good ones. As with several other things related to wires, a high price tag or big brand name doesn’t actually help in making the right selection. Instead, one has to look out for particular characteristics and specifications for picking the right cable.

Helical Strand Mechanics Modelling

Some 2014 papers on the mechanics of helical strands: cables and electrical conductors

Cable FEA modelling

A 2014 paper on cable FEA modelling

An early stick-slip model for cable bending analysis

One approach to helical strand (cable or overhead electrical conductor) bending analysis puts the emphasis on friction rather than on elastic curved rod behavior. Based on Coulomb’s laws of friction, it leads to stick-slip models where strand  bending stiffness varies with imposed curvature (Papailiou, 1995). Such an approach can be traced back to a Ph.D. thesis by H. Ernst, in 1933. This work is in fact often referred to in cable analysis reports. An English translation (with a short presentation) of the dissertation analytical part is attached.


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How to do a frequency sine sweep in abaqus CAE. I want to get a frequency response curve (mises stress,U) through applying a forcing function on a turbine disc to estimate stresess at resonating conditions.

Helical Strand in Bending

Several approaches have been used to deal with the complex problem of helical strands in bending. One of them is based on Love’s curved rods theory. It has first been used by Costello in his classical monograph “Theory of Wire Rope”. It has been extended by Sathikh et al. in several papers. A new contribution from this group is a Ph.D. Thesis by D. Gopinath : “Some studies on bending response of the stranded cable under free bending and constrained bending”, Anna University, Chennai (India), October 2013, 121 pages.

Justification for use of Riks method to investigate gross plastic deformation

Hi, my question is on the use of Riks and other Arc length methods when analysing  a system for gross plastic deformation. ASME B&PV code , in its investigation for Gross plastic deformation as a Load at which convergence does not take place. Now, as far as I understand, Newton Raphson method fails at locations of singularity in the stiffness matrix and also at Bifurcation points, it can trace the unstable primary paths. Both these issues can be overcome ( provided the limit point is not too sharp) by Riks and other Arc length methods.

New Open Access journal: Case Studies in Engineering Failure Analysis

Read over 40 open access articles from Case Studies in Engineering Failure Analysis

Case Studies in Engineering Failure Analysis provides a forum for the rapid publication of short, structured Case Studies in Engineering Failure Analysis and related Short Communications, and will provide an essential compendium of case studies for practitioners in the field of engineering failure analysis and others who are interested in the ways in which components fail.


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