10.1038/NPHYS4237 Instability in dynamic fracture and the failure of the classical theory of cracks Chih-Hung Chen1, Eran Bouchbinder2* and Alain Karma1* Cracks, the major vehicle for material failure1, undergo a micro-branching instability at ∼40% of their sonic limiting velocity in three...
A central prediction of this theory is that straight cracks smoothly accelerate to the Rayleigh wave speedcR(the velocity of surface acoustic waves) in large enough systems1. However, cracks universally undergo symmetry-breaking instabilities before reaching their theoretical limiting velocity2,3,4,5,6...
For continuous spherical hierarchical percolation models the classical percolation theory is developed. It is shown that by increasing the number of scales and the scale step the critical volume concentration can be made to approach unity.doi:10.1016/0031-9201(90)90093-DS. A. Molchanov...
A CONTINUUM DESCRIPTION OF FAILURE WAVESShattering of a brittle material such as glass occurs dynamically through a propagating failure wave, which however, can not be assigned to any of the classical wave. In this paper, we build a thermodynamically consistent theory based on the idea that a ...
which provide precursory information for failure events during the test. Stress profiles along and across the growing crack are analyzed and compared with Irwin’s classical solutions to understand the impact of SENB loading. Evolution in stress intensity factor and crack length shows subcritical crack...
The basic principles of Classical Laminate Theory (CLT) were extended to three-dimension, and the analytical solution was critically compared with the FEA results. The 3D FEA results revealed significant transverse normal stresses in the cross-ply laminate and in-plane shear stress in the angle-...
Thermal Buckling of Multi-Walled Carbon Nanotubes by Nonlocal Elasticity The small internal length scales of nanomaterials/nano-devices may call the direct application of classical continuum models into question. In this researc... R Li,GA Kardomateas - 《Journal of Applied Mechanics》 被引量: ...
The examination of longum BB-46 incorporated classical physiological characterization and a transcriptome profiling approach. The strains exhibited substantial variations in their growth characteristics, metabolite synthesis, and overall gene expression profiles. medical controversies The expression levels of ...
Classical theories and existing models for describing the yield surfaces of solid foams are derived from this criterion [88] and its extensions [89]. In its various forms, it has been applied not only to soils but also to polymers, concrete [90], polymeric foams, and syntactic foams [86,...
A classical SHPB system was used in this study, as shown in Fig. 1c. Table 1 lists the parameters of the SHPB device. The strain gauge on the incident bar measures the incident wave strain and the reflected wave strain in succession, and the strain gauge on the transmitted bar measures ...