Sabnis, Harris, White, and Mirza have produced a book with many useful attributes. In addition to presenting a clear and comprehensive treatment of the factors involved in testing reduced-scale structural models, the book is also a useful reference on many aspects of structural testing in general. Many concepts are illustrated using practical examples, providing a clear picture of the kinds of information that can advantageously be obtained from model tests.The authors begin with a discussion of the usefulness of model studies vis-a-vis analytical studies, noting that welldesigned models can in some cases provide more accurate information than that available from modern nonlinear structural analysis programs, and can also help the analyst concentrate on those aspects of structural response which are most significant for design purposes. The book then continues with a clear discussion of classical similitude (Buckingham's Pi Theorem), followed by a presentation of the specific factors involved in modeling elastic materials. An entire chapter each is devoted to inelastic models of concrete and Associate Professor,
Two epoxy adhesive types, Cole-Parmer and Devcon, were used for preparing aluminum-epoxy bondings. The adherend surfaces, of 30 mm in diameter, were prepared using grits of 120, 240, and 320 followed by a final grit of 400, according to the ASTM D897 standard. The curing was set at 72 h at room temperature. The samples were submitted to irradiation for different times in the pool of a SLOWPOKE-2 reactor which produced thermal neutrons, fast neutrons, and g rays. The tensile properties of nonirradiated and irradiated samples were obtained with an Instron Tester, model 4206. The failure stress, about 11 MPa for nonirradiated samples, had a large decrease after a short period of irradiation and then constantly increased for longer irradiation periods. This may be explained by a predominant effect of crosslinking over chain scissions for higher irradiation doses. The density data and tensile properties of the bulk cured epoxy (Devcon) also supported the above findings. The presence of water on the bonding joints had an effect of exaggerating the irradiation effects on the strength of joints. The use of the adhesive failure modes to group the results into subgroups has permitted the reduction of the spread of the results from the tensile tests.
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