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Buckling of shells
336
Chapter 15 has been extended to cover control b y attributes, b u t this section is rather weak and would benefit from a reference to the Defence Specification D E F 131-A. The authors are to be congratulated on their successful collaboration in writing this book. D.B. RICHARDSON
Buckling of Shells, edited b y E. Ramm, Springer-Verlag, Berlin, 1982. ISBN 3-540-11785-7. xv + 672 pages, illustrated with line-drawings and photographs. Hard-cover edition, US $40.90. This volume contains 23 papers presented at a "state-of-the-art" colloquium on the buckling o f shells, held at Stuttgart in 1982. The meeting was sponsored b y IASS and other groups. The authors all come from Western Europe (including Israel), and half were from West Germany. In the field of shell buckling there are several different schools of research work. Represented here are (i) the " c o m p u t e r " group, using large finiteelement programs, n o w combined with c o m p u t e r graphics; (ii) the "experimental" school, doing code-orientated testing o f a range of standard problems; (iii) the " m o d e l t e s t " group, making initial studies on novel engineering problems; and (iv) "practical designers" working on interesting practical problems with only a minimum of the conceptual framework which mechanics provides. The point of a colloquium, of course, is communication within the various groups and across the group boundaries. There is no record of the discussions which t o o k place at the meeting, so the reader is left to speculate a b o u t the level of communication which was actually achieved. My impression from the papers themselves is that many of the authors are so devoted to "ploughing their o w n furrow", that they are almost oblivious of what is going on around them. The most glaring example of this is the Argyris c o m p u t e r group whose " p a p e r " consists entirely of " p o s t e r s " or "viewgraphs" without any proper text, and with a list of references only to the group's own work. They describe their scheme as "natural" b u t it is, of course, almost pure artifice. In particular, this group seems to have no contact with a group of experimentalists working in the same University. The b o o k contains several pieces in which well-worn paths are re-trodden. But it also contains several examples of interesting new work. These include notably an intelligent analysis of elastic-plastic buckling of shells of revolution by Wunderlich, Reusch and Obrecht; some nice experimental and theoretical work on the buckling of liquid-filled pipes by Saal, and a useful study of the buckling of cylindrical oil-storage tanks by Resinger and Geriner. I finish with some questions and observations that might well have been raised at the meeting itself.
337 (1} Professor Koiter is almost alone in raising questions about the variety of buckling phenomena shown b y bars, plates and shells. But there seems in general to be very little curiosity a b o u t the fact that cylindrical shells sometimes buckle in a stable fashion {e.g.p. 312, Fig. 9) and sometimes explosively. (2) Professor Kratzig's group have done some impressive computational studies. It therefore seems odd that they should introduce into their calculations at a late stage the strange and intangible concept of "reduced membrane buckling". (3).Professor Arbocz has done a superb study of imperfections in real shells; b u t it is curious that he does not try formulas like the one at the top of p. 313 in order to identify the modes which are likely to have the largest amplitude in a given case. Let us hope that future meetings on shell structures will show some signs of an overdue gathering together of the n o w separated schools of research workers. C.R. CALLADINE
Technische Mechanik, von Holzmann, Meyer und Schumpich, B.G. Teubner Verlag, Stuttgart. Teil 1 : Statik, von G. Schumpich und H.-J. Dreyer, 6. Auflage, 1982. ISBN 3-519-46505-1, viii + 182 Seiten mit 262 Bildern, 64 Beispielen und 81 Aufgaben, Kart., DM 32,00; Teil 2: Kinematik und Kinetik, von H. Meyer und G. Schumpich, 5. Auflage, 1983. ISBN 3-519-46506-X, x + 365 Seiten mit 373 Bildern, 147 Beispielen und 179 Aufgaben, Kart., DM 44,00; Teil 3: Festigkeitslehre, yon G. Holzmann, H.-J. Dreyer und H. Faiss, 5. Auflage, 1983. ISBN 3-519-46507-8, xii + 336 Seiten mit 297 Bildern, 139 Beispielen und 108 Aufgaben, Kart., DM 44,00.
Die Bticher entstanden offensichtlich aus Vorlesungen, die die Autoren, unabh[ingig voneinander, fiber mehrere Jahre gehalten haben. In den drei B~inden wird klar und einpr'agsam in die betreffenden Sachgebiete eingeffihrt, so dass jeder mit Lehraufgaben Beauftragte diese Bficher als Vorlage benutzen kann. Die Bficher enthalten die folgenden drei Sachgebiete: Teil 1: Statik Grundbegriffe und Axiome der Statik starrer K5rper; Ebenes Kr/fftesystem mit einem gemeinsamen Angriffspunkt; Allgemeines ebenes Kr~iftesystem; Systeme aus starren Scheiben; Einffihrung in die r~iumliche Statik; Schwerpunkt; SchnittgrSssen des Balkens; Ebene Fachwerke; Reibung.
Chapter 15 has been extended to cover control b y attributes, b u t this section is rather weak and would benefit from a reference to the Defence Specification D E F 131-A. The authors are to be congratulated on their successful collaboration in writing this book. D.B. RICHARDSON
Buckling of Shells, edited b y E. Ramm, Springer-Verlag, Berlin, 1982. ISBN 3-540-11785-7. xv + 672 pages, illustrated with line-drawings and photographs. Hard-cover edition, US $40.90. This volume contains 23 papers presented at a "state-of-the-art" colloquium on the buckling o f shells, held at Stuttgart in 1982. The meeting was sponsored b y IASS and other groups. The authors all come from Western Europe (including Israel), and half were from West Germany. In the field of shell buckling there are several different schools of research work. Represented here are (i) the " c o m p u t e r " group, using large finiteelement programs, n o w combined with c o m p u t e r graphics; (ii) the "experimental" school, doing code-orientated testing o f a range of standard problems; (iii) the " m o d e l t e s t " group, making initial studies on novel engineering problems; and (iv) "practical designers" working on interesting practical problems with only a minimum of the conceptual framework which mechanics provides. The point of a colloquium, of course, is communication within the various groups and across the group boundaries. There is no record of the discussions which t o o k place at the meeting, so the reader is left to speculate a b o u t the level of communication which was actually achieved. My impression from the papers themselves is that many of the authors are so devoted to "ploughing their o w n furrow", that they are almost oblivious of what is going on around them. The most glaring example of this is the Argyris c o m p u t e r group whose " p a p e r " consists entirely of " p o s t e r s " or "viewgraphs" without any proper text, and with a list of references only to the group's own work. They describe their scheme as "natural" b u t it is, of course, almost pure artifice. In particular, this group seems to have no contact with a group of experimentalists working in the same University. The b o o k contains several pieces in which well-worn paths are re-trodden. But it also contains several examples of interesting new work. These include notably an intelligent analysis of elastic-plastic buckling of shells of revolution by Wunderlich, Reusch and Obrecht; some nice experimental and theoretical work on the buckling of liquid-filled pipes by Saal, and a useful study of the buckling of cylindrical oil-storage tanks by Resinger and Geriner. I finish with some questions and observations that might well have been raised at the meeting itself.
337 (1} Professor Koiter is almost alone in raising questions about the variety of buckling phenomena shown b y bars, plates and shells. But there seems in general to be very little curiosity a b o u t the fact that cylindrical shells sometimes buckle in a stable fashion {e.g.p. 312, Fig. 9) and sometimes explosively. (2) Professor Kratzig's group have done some impressive computational studies. It therefore seems odd that they should introduce into their calculations at a late stage the strange and intangible concept of "reduced membrane buckling". (3).Professor Arbocz has done a superb study of imperfections in real shells; b u t it is curious that he does not try formulas like the one at the top of p. 313 in order to identify the modes which are likely to have the largest amplitude in a given case. Let us hope that future meetings on shell structures will show some signs of an overdue gathering together of the n o w separated schools of research workers. C.R. CALLADINE
Technische Mechanik, von Holzmann, Meyer und Schumpich, B.G. Teubner Verlag, Stuttgart. Teil 1 : Statik, von G. Schumpich und H.-J. Dreyer, 6. Auflage, 1982. ISBN 3-519-46505-1, viii + 182 Seiten mit 262 Bildern, 64 Beispielen und 81 Aufgaben, Kart., DM 32,00; Teil 2: Kinematik und Kinetik, von H. Meyer und G. Schumpich, 5. Auflage, 1983. ISBN 3-519-46506-X, x + 365 Seiten mit 373 Bildern, 147 Beispielen und 179 Aufgaben, Kart., DM 44,00; Teil 3: Festigkeitslehre, yon G. Holzmann, H.-J. Dreyer und H. Faiss, 5. Auflage, 1983. ISBN 3-519-46507-8, xii + 336 Seiten mit 297 Bildern, 139 Beispielen und 108 Aufgaben, Kart., DM 44,00.
Die Bticher entstanden offensichtlich aus Vorlesungen, die die Autoren, unabh[ingig voneinander, fiber mehrere Jahre gehalten haben. In den drei B~inden wird klar und einpr'agsam in die betreffenden Sachgebiete eingeffihrt, so dass jeder mit Lehraufgaben Beauftragte diese Bficher als Vorlage benutzen kann. Die Bficher enthalten die folgenden drei Sachgebiete: Teil 1: Statik Grundbegriffe und Axiome der Statik starrer K5rper; Ebenes Kr/fftesystem mit einem gemeinsamen Angriffspunkt; Allgemeines ebenes Kr~iftesystem; Systeme aus starren Scheiben; Einffihrung in die r~iumliche Statik; Schwerpunkt; SchnittgrSssen des Balkens; Ebene Fachwerke; Reibung.