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Fifth National Conference with international participation on Mechanics and Technology of Composite Materials
Conference reports
(b) Applications of probabiii~tic methods for estimation of the behaviour of the materia;s u~der randomly increasing load and the extent of damage. (c) Development of methods concerning the relationship between structural characterisation of the materials (especially their micro-mechanical characteristics) and their behaviour under static loads. (d) Applications of numerical methods for analysis of fracture process in the materials. (e) Experimental verifications of the different theoretical models of the materials, especially the models for the prediction of crack propagation behaviour. (f) Applications of non-linear fracture mechanics methods for analysis of crack patterns in the materials. (3) Investigations of dynamic properties of the materials are rather limited compared to research on static properties. It is known, however, that some types of brittle matrix composites, especially fibre reinforced concrete, are very appropriate materials for applications in structural elements subjected to dynamic loads (4) Brittle matrix composites are tested by different experimental methods, using very complex and expensive equipment. On the other hand, however, the lack of standard methods for testing these materials may be observed. (5) In spite of many fundamental researches on brittle matrix composites performed so far, the design methods concerning the applications of these materials in various structural elements are not developed as yet. The applications are generally based rather on engineering experience or on Jests carried out for practical purposes than on theoretical analysis. It is difficult in a short review to report in more detail information about all the interesting papers presented during the Symposium. Full texts of these papers will be published as the Symposium Proceedings a few months after the Symposium by the Elsevier Aloplied Science Publishers. Besides the plenary and parallel sessions two 'Round Table Discussions' were organised during the Symposium. They ,;vere led by Professor H. Krenchel of Technical University of Denmark and b~. J W. Oougil! of The Institution of Structural Engineers, U.K. The list of items proposed for the discussions was prepared by the Organising Committee. The problems concerning the future development of composite materials, the education in 'composite thinking', the progress in research on brittle matrix composites of different types, design methods of composite materials and many other subjects were discussed. The cliscussions provided a good opportunity for exchange of views and were very fruitful. A very interested audience, good organisation and hospitality of the host participants were important
58
elements of this successful Symposium. It should also be mentioned that the participants were invited to an evening reception by Mr. W. Pastenak, the Head of The Region Kieice Authorities. Last but not least, a friendly atmosphere and informal contacts between particpants made a successful symposium. Wojciech Radomski
Fifth National Conference with international participation on Mechanics and Technology of Composite Materials 29 September-1 October i988, Varna, Bulgaria. This series of conferences was initiated in 1976, and since then, every third year in September on the Black Sea coast the problems of mechanics of cement and polymer based composites are considered. This year, over 250 participants come from 12 countries and enjoyed a few days of lectures, discussions and social events. The papers were presented in three languages: Bulgarian. Russian and English with simultaneous translatior, assured. Main subjects were presented by foreign lecturers in the form of 9 plenary papers: (1) Doctor J. Mellema (The Netherlands) - Rheology of dispersed systems and rheological measurements. (2) Professor A. Ya. Malkin (USSR)- Rheokinetics of the solidification of oligomer binders. (3; ProfessorV. V. Shpeizman (USSR)-The deformation effect on the fracture of solids. (4~ ~'~ofessor T. V. Kouznetsova (USSR) - Structure and properties of ,t~st hardening, super-fast hardening, expanding and strained concretes. (5) Professor N. B. Uriev (USSR) - Microrheology of concentrated aggregated suspensions. (6) Doctor R. Lapazin (Italy) - Experimental approaches to the rheology of cement pastes and clay suspensions (7) Professor Y. Ohama (Japan)- Recent developments of concret~,-polymer compesites in Japan. (8) Doctor P. Stroeven (The Netherlands) - Newest investigations on strength, durability and fracture of steel fibre reinforced concretes. (9) Professor V. I. Solomatov (USSR) -- Structure formation and intensive technologies of silicate composite materials. Other papers were, deltver~d in t.,~n rooms simu!taneously and shown in poster sessions. Altogether there were 110 papers presented and nearly 150 published in the Proceedings volume which was distributed to all participants at registration. Good organisation, excellent living conditions together with beautiful nature around the Conference Centre and nice weather at that time of the year contributed to the success of the conference. A. M. Brandt
(b) Applications of probabiii~tic methods for estimation of the behaviour of the materia;s u~der randomly increasing load and the extent of damage. (c) Development of methods concerning the relationship between structural characterisation of the materials (especially their micro-mechanical characteristics) and their behaviour under static loads. (d) Applications of numerical methods for analysis of fracture process in the materials. (e) Experimental verifications of the different theoretical models of the materials, especially the models for the prediction of crack propagation behaviour. (f) Applications of non-linear fracture mechanics methods for analysis of crack patterns in the materials. (3) Investigations of dynamic properties of the materials are rather limited compared to research on static properties. It is known, however, that some types of brittle matrix composites, especially fibre reinforced concrete, are very appropriate materials for applications in structural elements subjected to dynamic loads (4) Brittle matrix composites are tested by different experimental methods, using very complex and expensive equipment. On the other hand, however, the lack of standard methods for testing these materials may be observed. (5) In spite of many fundamental researches on brittle matrix composites performed so far, the design methods concerning the applications of these materials in various structural elements are not developed as yet. The applications are generally based rather on engineering experience or on Jests carried out for practical purposes than on theoretical analysis. It is difficult in a short review to report in more detail information about all the interesting papers presented during the Symposium. Full texts of these papers will be published as the Symposium Proceedings a few months after the Symposium by the Elsevier Aloplied Science Publishers. Besides the plenary and parallel sessions two 'Round Table Discussions' were organised during the Symposium. They ,;vere led by Professor H. Krenchel of Technical University of Denmark and b~. J W. Oougil! of The Institution of Structural Engineers, U.K. The list of items proposed for the discussions was prepared by the Organising Committee. The problems concerning the future development of composite materials, the education in 'composite thinking', the progress in research on brittle matrix composites of different types, design methods of composite materials and many other subjects were discussed. The cliscussions provided a good opportunity for exchange of views and were very fruitful. A very interested audience, good organisation and hospitality of the host participants were important
58
elements of this successful Symposium. It should also be mentioned that the participants were invited to an evening reception by Mr. W. Pastenak, the Head of The Region Kieice Authorities. Last but not least, a friendly atmosphere and informal contacts between particpants made a successful symposium. Wojciech Radomski
Fifth National Conference with international participation on Mechanics and Technology of Composite Materials 29 September-1 October i988, Varna, Bulgaria. This series of conferences was initiated in 1976, and since then, every third year in September on the Black Sea coast the problems of mechanics of cement and polymer based composites are considered. This year, over 250 participants come from 12 countries and enjoyed a few days of lectures, discussions and social events. The papers were presented in three languages: Bulgarian. Russian and English with simultaneous translatior, assured. Main subjects were presented by foreign lecturers in the form of 9 plenary papers: (1) Doctor J. Mellema (The Netherlands) - Rheology of dispersed systems and rheological measurements. (2) Professor A. Ya. Malkin (USSR)- Rheokinetics of the solidification of oligomer binders. (3; ProfessorV. V. Shpeizman (USSR)-The deformation effect on the fracture of solids. (4~ ~'~ofessor T. V. Kouznetsova (USSR) - Structure and properties of ,t~st hardening, super-fast hardening, expanding and strained concretes. (5) Professor N. B. Uriev (USSR) - Microrheology of concentrated aggregated suspensions. (6) Doctor R. Lapazin (Italy) - Experimental approaches to the rheology of cement pastes and clay suspensions (7) Professor Y. Ohama (Japan)- Recent developments of concret~,-polymer compesites in Japan. (8) Doctor P. Stroeven (The Netherlands) - Newest investigations on strength, durability and fracture of steel fibre reinforced concretes. (9) Professor V. I. Solomatov (USSR) -- Structure formation and intensive technologies of silicate composite materials. Other papers were, deltver~d in t.,~n rooms simu!taneously and shown in poster sessions. Altogether there were 110 papers presented and nearly 150 published in the Proceedings volume which was distributed to all participants at registration. Good organisation, excellent living conditions together with beautiful nature around the Conference Centre and nice weather at that time of the year contributed to the success of the conference. A. M. Brandt