Unilateral Problems in Structural Analysis IV: Proceedings by S. Bennati, M. Lucchesi (auth.), Prof. G. Del Piero, Prof.

By S. Bennati, M. Lucchesi (auth.), Prof. G. Del Piero, Prof. Ing. F. Maceri (eds.)

The current quantity includes the contributions to the fourth assembly on Unilateral difficulties in Structural research, held at Capri on June 14 to 16,1989. The previous conferences happened at Villa Emma, close to Udine, on might 1982, at Ravello on September 1983 and back at Villa Emma on June 1985. ebook of the court cases all started with the second one assembly; the 2 ensuing volumes have been released by means of Springer Verlag, Vienna, below the sequence Cism classes and Lectures. Unilateral difficulties look as a novel instance of confluence of pursuits: they're the item of the eye of natural and utilized mathematicians, of experts in Continuum Mechanics and engineers. the belief which gave beginning to this sequence of conferences was once that of placing jointly humans coming from such varied fields. the outcome was once a really fruitful trade of stories; it contributed, we think, to the development of the data within the sector. The contents of the current quantity displays the composite personality of the assembly. There are contributions within the mathematical thought (Has linger, Panagiotopoulos, Romano), and reviews in classical difficulties of Mechanics similar to unilateral touch with friction (Kalker, Klarbring, Licht, Telega), Plasticity (Corradi, Del Piero, Owen) and composite fabrics and buildings (Bruno, Leonardi). a few contributions care for no longer but thoroughly explored questions of unilateral dynamics (Guo, Jean); ultimately, a contribution (Bennati) issues the relatively new topic of masonry buildings, within which the unilateral constraint enters on the constitutive level.

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Finite Element Analysis of Nonlinear Laminated Composite Plates 10 8 27 --linear - ARAMID- RUBDER - -non linear ARAMID-RUBDER a/h'100 @] 4 -50 q 100~-1~00~-250-- b) a) Fig. 7 - Cross-ply square plate a) Influence of material and geometric nonlinearities. M. ) b) Influence of boundary conditions REFERENCES [ 1] E. Reissner and Y. Stavsky, Bending and stretching of certain types of heterogeneous aelotropic elastic plates. J. Appl. Mech. 28, 402-408 (1961). [2] C. W. L. Mayberry, Free vibrations of unsymmetrically laminated anisotropic plate with clamped edges.

Conventional and Unconventional Plastic Response and Representation, Appl. Mech. Reviews, Vol. 41, p. 151-167,1988. DEL PIERO, G. Recent Developments in the Mechanics of Materials 'il'hich do not Support Tension, Proc. Internat. Colloquium on Free Boundary Problems, Irsee, W. Germany, 1987 (to appear). , A New Function Space for the Mathematical Theory of Plasticity, Proc. Symp. S. KHAN & M. , Pergamon Press 1989. , &]. 1. CHABOCHE, Mecanique des materiaux solides, Dunod, 1985. , &]. HULT, Fracture Mechanics and Damage Mechanics, a Combined "4pproach, Journ.

3 59 Dynamics of Rigid Bodies with Dry Friction Shock law: In dynamical problems, the presence of unilateral constraints involves the possibility of collisions. A shock law thus has to be prescribed. Velocities will be assumed to be functions of time with bounded variation. This allows one to define, at every instant, the right and left velocities 'l1+ and'll' of the concerned particle; these two limits are expected to be different if a collision occurs. e. vector measures on the considered time interval.

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