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Selected papers on stress analysis
2!)1
BWJK HIWIKWS
seusc) who adopts this approach has at least got the assurance t llat his Inatc*rial will bc uscf’ul iIt the loug run unless - as is too often the case - his students are allowed to cmse to think about At least, this point of view is an arguable one and tbc teacher that nratcrial after graduation. who adopts it will welcome the hook under review. Here is a well-written, lucid book that is conccrned almost exclusively with elementary mathematical background. In this reviewer’s estimation, this book should prove most useful to the teacher who remembers that it is not even intended to tell the whole story. There is far more to engineering than elcmen tary nutthcmatics. The teacher - and reviewer - who does not remember this may not be very happy with the book. The selection of theory that is dealt with by the authors is a fairly common one, though it does include Lagrange‘s equations, electro-mechanical analogucs, elementary wave theory and theory of sound and also the elements of non-linear analysis. Two omissions, on the other hand, are matrices and a proper exploitation of impedance methods. The book is thoroughly rradablc and dependable and could well be ’ required reading ’ for an lionours tlegrcc cauditlatc. I(. I% I). lilsllol~
Selected Papers on Stress Analysis, Presented at, The lnstitutc ot’ L’lrysics Stress .\ual.vsis Group Conference, Delft, 1959. The Institute of Physics, I,ondon, 1961. 114 pp, 50s. TIIE FIRW International Conference on Experimental Stress Analysis, initiated and orgauized by the Stress Analysis Group of the Institute of Physics with the help ol’ T.N.O. of Ilolland, was held in Delft in April 1959. This slim volume represents its proceedings in a sadly mutilated form. The selection of eighteen papers published in full, out of fifty-one offcrctl at the Conference, Six German and two follows no recognizable guiding line in subject matter, quality or originality. French contributions are presented in their original language, one Russian, one French, four i)utch and four F:nglish contributions are given io b:nglish. Each contribution is preceded by an author’s summary in English, French and German. The papers not published in full are described in a survey so shortened as to be meaningless in places. Publication has taken just short of 2 years from the date of the Conference and in the meautime several contributions have been published elsewhere in amended fornl. Of the papers given in full, seven deal with photoelasticity. three with estensometry, five Kith electrical ancillaries to strain measurement, one with analogue applications of the RIoir6 method, one with load analysis by dcstructivc testing and one with brittle fracture. The following are perhaps of outstanding interest : a determination of stresses iu complicated Francis turbine components by means of composite pcrspes and epos~- resin models investigated with strain gauges, extensometers and various photoelastic methods (~‘KIWHO~.SI~I) ; a new electric-screening displacement transducer with a small aluminium plate attached to the nloving part and displaced between fixed primary and secondary rlectronlagncts, giving full-scale dcflesions between 1 and lo4 p with unlimited override (NOLTINUI;) : complete analysis of loads carried by the single welds in a fully we&d joist --upright connection by simple fracture of fifty-four selected test pieces (L~c~rx~n~no) ; survey- of the potentialities of magnetic tape recording (I%~rrx~) ; strain gauge calibration at temperatures up to 700 deg. C (RI.\sr.l,:x and Coanrs). Amongst the thirtythree unpublished papers, at least the iuvestigation by strain gauges into the stresses iu internal strands of wire ropes (1)Aarauxr) would have been of equal mrrit and interest. Make-up and presentation are csccllent. The full addresses of all tbc fifty-one authors are given, a feature thoroughly recommended for all procccrlings of all couferrnces. Details of the Second International Conference in Paris, IO- 14 April 1962 are obtainable from RI. llor.~, Secretary, C.I’..\.(‘., 10 rue Vaucluelio Paris .i’, or from The Secretary, *Joint lsritisti C’onmrittee for Stress Analysis, 1 lsirdcage \Yalk. I,ondon S.\V 1. nI. L. JIEYER
It. F. S. HEARMON :
An Introduction Oxford, 1961. viii + 136 pp., 35s.
to Applied
Anisotropic
Elasticity.
Clarendon Press,
: it will indeed serve as a useful introduction for newcomers to linear anisotropic elasticity, it is also, in part, an extended survey article, with a valuable bibliography,
THIS book has three aspects
BWJK HIWIKWS
seusc) who adopts this approach has at least got the assurance t llat his Inatc*rial will bc uscf’ul iIt the loug run unless - as is too often the case - his students are allowed to cmse to think about At least, this point of view is an arguable one and tbc teacher that nratcrial after graduation. who adopts it will welcome the hook under review. Here is a well-written, lucid book that is conccrned almost exclusively with elementary mathematical background. In this reviewer’s estimation, this book should prove most useful to the teacher who remembers that it is not even intended to tell the whole story. There is far more to engineering than elcmen tary nutthcmatics. The teacher - and reviewer - who does not remember this may not be very happy with the book. The selection of theory that is dealt with by the authors is a fairly common one, though it does include Lagrange‘s equations, electro-mechanical analogucs, elementary wave theory and theory of sound and also the elements of non-linear analysis. Two omissions, on the other hand, are matrices and a proper exploitation of impedance methods. The book is thoroughly rradablc and dependable and could well be ’ required reading ’ for an lionours tlegrcc cauditlatc. I(. I% I). lilsllol~
Selected Papers on Stress Analysis, Presented at, The lnstitutc ot’ L’lrysics Stress .\ual.vsis Group Conference, Delft, 1959. The Institute of Physics, I,ondon, 1961. 114 pp, 50s. TIIE FIRW International Conference on Experimental Stress Analysis, initiated and orgauized by the Stress Analysis Group of the Institute of Physics with the help ol’ T.N.O. of Ilolland, was held in Delft in April 1959. This slim volume represents its proceedings in a sadly mutilated form. The selection of eighteen papers published in full, out of fifty-one offcrctl at the Conference, Six German and two follows no recognizable guiding line in subject matter, quality or originality. French contributions are presented in their original language, one Russian, one French, four i)utch and four F:nglish contributions are given io b:nglish. Each contribution is preceded by an author’s summary in English, French and German. The papers not published in full are described in a survey so shortened as to be meaningless in places. Publication has taken just short of 2 years from the date of the Conference and in the meautime several contributions have been published elsewhere in amended fornl. Of the papers given in full, seven deal with photoelasticity. three with estensometry, five Kith electrical ancillaries to strain measurement, one with analogue applications of the RIoir6 method, one with load analysis by dcstructivc testing and one with brittle fracture. The following are perhaps of outstanding interest : a determination of stresses iu complicated Francis turbine components by means of composite pcrspes and epos~- resin models investigated with strain gauges, extensometers and various photoelastic methods (~‘KIWHO~.SI~I) ; a new electric-screening displacement transducer with a small aluminium plate attached to the nloving part and displaced between fixed primary and secondary rlectronlagncts, giving full-scale dcflesions between 1 and lo4 p with unlimited override (NOLTINUI;) : complete analysis of loads carried by the single welds in a fully we&d joist --upright connection by simple fracture of fifty-four selected test pieces (L~c~rx~n~no) ; survey- of the potentialities of magnetic tape recording (I%~rrx~) ; strain gauge calibration at temperatures up to 700 deg. C (RI.\sr.l,:x and Coanrs). Amongst the thirtythree unpublished papers, at least the iuvestigation by strain gauges into the stresses iu internal strands of wire ropes (1)Aarauxr) would have been of equal mrrit and interest. Make-up and presentation are csccllent. The full addresses of all tbc fifty-one authors are given, a feature thoroughly recommended for all procccrlings of all couferrnces. Details of the Second International Conference in Paris, IO- 14 April 1962 are obtainable from RI. llor.~, Secretary, C.I’..\.(‘., 10 rue Vaucluelio Paris .i’, or from The Secretary, *Joint lsritisti C’onmrittee for Stress Analysis, 1 lsirdcage \Yalk. I,ondon S.\V 1. nI. L. JIEYER
It. F. S. HEARMON :
An Introduction Oxford, 1961. viii + 136 pp., 35s.
to Applied
Anisotropic
Elasticity.
Clarendon Press,
: it will indeed serve as a useful introduction for newcomers to linear anisotropic elasticity, it is also, in part, an extended survey article, with a valuable bibliography,
THIS book has three aspects