By Dai-heng Chen
Thin-walled buildings can be utilized to take in impression power in the course of a automobile collision. Crush Mechanics of Thin-Walled Tubes describes the research and layout of those light-weight parts and punctiliously explains the deformation behaviors of thin-walled hole participants lower than crushing loading. The publication covers, intimately, thin-walled structures―under axial compression, bending, and torsion. It presents a whole knowing of the underlying options and mechanisms of power absorption elements, contains research options, and covers present theoretical methods in addition to the author’s research.
Geared towards engineering scholars, working towards mechanical and structural engineers, and researchers attracted to studying power absorption and designing buildings that can suffer affects, this book:
- Addresses axial compression of round and sq. tubes, and bending and torsion of tubes
- Summarizes the mechanism of cave in and linked calculations for the preliminary top strength and the common compressive force
- Explores components controlling the axial cave in of a plate
- Investigates systematically the deformation features of corrugated tubes lower than axial crush
- Provides an realizing of the cave in habit of contributors present process bending deformation while attempting to evaluation energy and energy-absorption characteristics
- Looks on the bending deformation of round and sq. tubes
- Explains the attribute pulling down phenomenon, the utmost second in bending deformation, and the moment-rotation relation in the course of bending collapse
- Discusses the cave in habit of thin-walled constructions with an open move part in the course of axial crushing and bending deformation
- Includes the proposition of a brand new strategy for comparing the utmost bending second of sq. tubes with attention of sidewall buckling
- Proposes a brand new approach that may be used to figure out the relation among the bending second M and the rotation attitude θ
- Presents research tools for predicting the utmost torsion second in every one case
A shelf-worthy reference showcasing structural mechanics, Crush Mechanics of Thin-Walled Tubes presents a easy realizing of the basic techniques and mechanisms of crushing deformations in thin-walled constructions and serves as a consultant for either educating and self-study.
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Extra info for Crush mechanics of thin-walled tubes
9 Stresses σx and σθ at the section corresponding to the apex of the first folding wrinkle under axial compression . by Mao and Lu , who compared their results with the experimental results obtained by Lee ) show that the J2 deformation theory gives better prediction results than the J2 incremental theory. Note that the plastic strain hardening coefficient Et is small in the cylindrical materials used in the experiments. 01 for a stress value near the buckling stress of 90 MPa. It is difficult to accept the conclusion that, in regard to the buckling stress in plastic axial compression of a circular tube, a better prediction is given by the J2 deformation theory than the J2 incremental theory; this is called the plastic buckling paradox, which is similarly found in the case of the plastic buckling of a plate.
0 is a strain rate insensitive material. It is seen from the relations between σsd and ε˙ shown in Fig. 1 that the strain rate dependence of the dynamic yielding stress σsd becomes remarkable in the order from Comb. 1 to Comb. 4. d In general, the dynamic buckling stress σbuc for a tube made of a strain rate sensitive material is higher than that of a stain rate insensitive material. Fig. 22 shows the comparison of the axial stress and displacement relationship for two tubes made of Comb. 0 and Comb.
79) Further, the process of wrinkle formation is divided into two steps: the total crushing of inner wrinkle (where the angle α reaches the limit value αf ) and the total crushing of outer wrinkle (where the angle α reaches the limit value βf ); and the crushing process is described by the angles α and β. In the total crushing process of the inner wrinkle, the angle α changes from α1 to its limit value αf , and the angle β changes from 0 to β1 . 80) On the other hand, in the total crushing of the outer wrinkle, the angle β changes from β1 to its limit value βf , and the angle α changes from 0 to α1 .
Crush mechanics of thin-walled tubes by Dai-heng Chen