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ESIS-TC05 Dynamics of fracture and structural transformations

 


 

Chairman


Prof. Yuri PETROV

Saint Petersburg State University,
Faculty of Mathematics and Mechanics

E-mailyp@YP1004.spb.edu

Co-Chairman

Prof. Vadim Silberschmidt

Loughborough University,
Wolfson School of Mechanical and Manufacturing Engineering

 E-mail: V.Silberschmidt@lboro.ac.uk

Secretary

Dr. Nikita Kazarinov

Saint Petersburg State University,
Faculty of Mathematics and Mechanics

E-mailn.kazarinov@spbu.ru




TC5 UPDATE 2019

You are welcomed to participate in minisimposium “Fracture and Structural Transformations under High Rate and Impact Loading” planned at 23rd European Conference of Fracture, June 27th – July 3rd, 2020, Madeira, Portugal

TC5 UPDATE 2015

TC5 meeting was organized during ICM12 in Karlsruhe, Germany. The meeting was attended by several ESIS/TC5 members. 

The main topic of the discussion was  reinvigoration of TC5 activities. 

The following actions were suggested:

  • to use the platform of ECF (European Conference on Fracture) - starting with the next meeting in 2016 in Catania, Italy - for consolidation of the dynamic-fracture activities by organizing dedicated sessions;
  • to consider organizing special events (e.g. EUROMECH Colloquia) in years without ECF meetings;
  • to put emphasis on participation of early-stage researchers in these events;
  • to invite industrial partners to these events;
  • to approach the ESIS regarding possibility of sending out information about the TC5's "new start" and invitation to the ECF Special Session in Dynamic Fracture to all ESIS members;
  • to support self-organization of interest groups of TC5 members, creating, if needed, respective subcommittees.

As a result, Minisymposium “Dynamic Fracture” (chaired by Y. Petrov and V. Silberschmidt) was included into the ECF21 program (see http://www.ecf21.eu/). All TC5 members are encouraged to submit their papers and recommend their colleagues with interests covered by the symposium’s topic to submit their abstracts to the minisymposium (Deadline: 30.11.2015).

Six topics were chosen as points of special interest of TC5 within its scope:

1) Dynamics of fracture in brittle long-range ordered materials (brittle crystals): study of energy-speed relationship for a single crack (theoretical, experimental and numerical); fracture mechanisms along a crack front; an effect of a reflected stress wave.

2) Dynamics of fracture via atomistic simulations to understand the atomistic scale of dynamic fracture.

3) Metamaterials with special performances in dynamics and dynamic testing protocols for specially engineered materials, which might require non-standard measurements.

4) Application of the incubation-time approach to quasi-brittle materials.

5) Development of new engineering standards and recommendations for testing the strength of materials undergoing high-rate dynamic deformation. The development of standard testing procedure providing a set of material properties should be accompanied by elaboration and dissemination of simple (easily applicable in engineering practice) criteria capable of reliable prediction, based on the measured material properties and strength of material/structure undergoing dynamic deformation.

6) Dynamic fracture of composites.

Prof. Vadim Silberschmidt (Loughborough University, UK) was elected to serve as TC5 vice-chairman and Dr Vladimir Bratov (St. Petersburg State University, Russia) was elected to serve as TC5 secretary.


TC5 UPDATE 2008

The activities of TC5 include the exchange of expertise in all aspects of impact fracture and high-strain rate material properties, and the development of agreed test methods in these fields, leading to ESIS or International standards. TC5 members work closely on standards issues with Dymat and with the relevant ASTM E08 and E28 committees. New committee members are always welcome.

TC5 has about forty active members. It normally meets for one or two days, twice per year at varied European locations, with around 15 members normally attending, although lately numbers have been reduced. The following meetings were held recently:-
April 2007 - Corus Steel, Rotherham, UK
October 2007 – SCK-CEN Brussels, Belgium
By agreement, there was no Spring meeting in 2008, and the next meeting will be arranged for October/November, venue to be finalised.

Our test procedure on sub-size Charpy V is officially available as Annex D of the standard ISO14556, also developed by TC5.
The ISO document about precracked Charpy specimens is at the CD (Committee Draft) stage, and if all goes well at the September 2008 ISO meeting in Hannover, it will move to the DIS (Draft International Standard) stage. This method has also been taken up by ASTM E 08 and is planned to be included in future E1820/E1921 fracture standards. TC5 member Enrico Lucon of SCK/CEN Belgium has continued his valuable assistance at ISO and ASTM committees, and the chairman has also been able to attend recent ASTM meetings.
The round-robin on high-rate tensile testing of sheet materials is complete, but some limited work continues on data analysis techniques. TC5 members are also closely involved in developing the new ISO sheet test standard. Hopefully some aspects of our ESIS procedure on dynamic tensile testing P7-00 can also be included; if not it remains a committee objective to take this document to ISO independently.
The procedure on impact compression has made good progress, with a successful round-robin on armco iron. There will be a paper by TC5 member Jan Dzugan on this topic at ECF 17 in Brno, and the method has been applied successfully to structural steels and titanium alloy in tests at Imperial College London. The chairman has been invited to speak at a NATO Workshop on damaged Structures in Slovenia in October, which will publicise our work to a wider audience.
A number of new work initiatives are planned, including pre-cracked sub-size Charpy testing, and these are under discussion. The chairman has now retired from the Dymat Governing Board under their rules, but continues in close contact.

TC5 UPDATE 2007

The activities of TC5 include the exchange of expertise in all aspects of impact fracture and high-strain rate material properties, and the development of agreed test methods in these fields, leading to ESIS or International standards. TC5 members work closely on standards issues with Dymat and with the relevant ASTM E08 and E28 committees. New committee members are always welcome.

TC5 has about forty active members. It normally meets for one or two days, twice per year at varied European locations, with around 15 members normally attending, although lately numbers have been reduced. The following meetings were held recently:-
October 2006 – Fraunhofer Institute IWM, Freiburg, Germany
April 2007 - Corus Steel, Rotherham, UK
The next meeting is planned for October/November 2007, with the venue to be finalised.

It has now been agreed that our test procedure on sub-size Charpy V will be added as an annex to the instrumented Charpy method ISO14556, also developed by TC5. The recently-finished pre-cracked Charpy test method has been accepted as work item ISO WD 26843 by ISO TC164 and is making satisfactory progress towards full standard status. TC5 member Enrico Lucon of SCK/CEN Belgium has been very helpful in monitoring progress at ISO committees.

The round-robin on high-rate tensile testing of sheet materials was completed some time ago, and the programme is continuing with comparisons of data analysis techniques. TC5 members were also closely involved in developing the new German standard SEP1230 high-rate test method for sheet steels for the automotive industry, and are following this through with the ISO committee that is currently working on this topic. Hopefully some aspects of our ESIS procedure on dynamic tensile testing P7-00 can also be included.

The work on impact compression is progressing well, with a successful round-robin on aluminium alloys in 2005/06; we are now starting a new round on armco iron.
A number of new work initiatives are planned and under discussion. Several TC5 members attended the successful Dymat conference in Dijon in September 2006, and the chairman continues to serve on the Dymat Governing Board.

The current officers of TC5 are:
- chairman - Hugh MacGillivray, Imperial College London, UK [h.macgill@imperial.ac.uk]
- vice-chairs - Gyongyver Lenkey, Bay Zoltan Institute, Miskolc, Hungary [lenkey@bzlogi.hu] and Uwe Mayer, MPA Stuttgart, Germany [Uwe.Mayer@mpa.uni-stuttgart.de]
- secretary – Celia Watson, RMCS [c.h.watson@cranfield.ac.uk].
 

TC5 UPDATE 2006

ESIS Technical Committee TC5 on Impact Testing at Intermediate Strain Rates

Report – May 2006

The activities of TC5 include the exchange of expertise in all aspects of impact fracture and high-strain rate material properties, and the development of agreed test methods in these fields, leading to ESIS or International standards. TC5 members work closely on standards issues with Dymat and with the relevant ASTM E08 and E28 committees. New committee members are always welcome.

TC5 has about sixty active members. It normally meets for one or two days, twice per year at varied European locations, with around 20 members normally attending. The following meetings were held recently:- April 2005 - CIDAUT, Valladolid, Spain; September 2005 - TU Vienna, Austria; April 2006 – Inst of Physics of Materials, Brno, Czech Republic The next meeting is planned for October 2006, with the venue to be finalised.

Recent technical highlights include completion of the test procedure on sub-size Charpy V, which is now under consideration by ISO TC164/SC4P. This will be added as an annex to the instrumented Charpy method ISO14556 which was also developed by TC5. Work on the pre-cracked Charpy test method is complete after 15 years work. If all goes well, it will be accepted as a work item by ISO TC164 later this year.

Work also continues on the development of methods for high-rate tensile testing of sheet materials. A round-robin has been completed on testing steels, aluminium and magnesium alloys at strain rates of 40/sec and 400/sec. The programme is currently in the data analysis phase, and TC5 members have been closely involved in developing a new German standard high-rate test for sheet steels for the automotive industry. The work on impact compression has re-started, with a new round-robin on aluminium alloys in late 2005; initial results look promising.

The committee made a further determined effort to obtain EC funding to support its work, with the HIRATE Co-ordination Action proposal on high rate testing and modelling procedures submitted under FP6 in 2005. This ambitious programme, involving more that 20 partner institutions, passed all the evaluation thresholds but was not funded. We are considering the best way to proceed.

Several TC5 members attended the successful Dymat conference in Porto in September 2003, and the chairman was elected to the Dymat governing board. John Sturges of Leeds Metropolitan University resigned as secretary at the end of 2004, and has been succeeded by Celia Watson from RMCS Shrivenham.

The current officers of TC5 are:
chairman - Hugh MacGillivray, Imperial College London, UK [h.macgill@imperial.ac.uk]
vice-chairs - Gyongyver Lenkey, Bay Zoltan Institute, Miskolc, Hungary [lenkey@bzlogi.hu] and Uwe Mayer, MPA Stuttgart, Germany [Uwe.Mayer@mpa.uni-stuttgart.de]
secretary – Celia Watson, RMCS [c.h.watson@cranfield.ac.uk]



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