Problem: It is often assumed that the heritability of performance traits (function) can be estimated by the heritability of primary traits (e.g. form). It is also frequently assumed that performance traits should be less heritable than primary traits. These assumptions should be carefully evaluated rather than assumed. One common area of study in which these assumptions have been made is anti-p...

Recent three-point bend tests of size effect on the strength of geometrically scaled sandwich beams of three types – with no notches, and with notches at the upper or lower skin–foam interface, which were previously evaluated using simplified sandwich beam theory and equivalent linear elastic fracture mechanics, are now reanalyzed more accurately by finite elements. Zero-thickness interface ele...

composites materials are widely used because of their high specific stiffness and strength. although the methods and techniques of designing these materials are well developed, however, the research on the behavior of these materials under impact and dynamic loadings are still under progress. in this article the crushing and energy absorption of composite tubes under axial dynamic loadings are ...

This paper highlights the effects of cell wall material strain hardening and density functional gradation (FG) on in-plane constant-velocity dynamic crushing response and impact behavior of hexagonal honeycombs. Results show that cell wall material strain hardening influences the distinct deformation modes induced by crushing velocity generally observed in regular hexagonal honeycombs. This is ...

Both chemical corrosion and axial compression impose critical influences on the internal microstructure of rock. Meanwhile, can change a rock’s mineral composition, which in turn affects physical mechanical properties To investigate dynamic strength characteristics white sandstone under coupling effect load corrosion, static combined loading test device was adopted for performing cyclic impact ...

assessing the behavior of composite structures which are subjected to impact loads is one of the important subjects in the field of mechanical sciences. using thin-walled tubes which collapsed and absorbed the impact energy is a well-known method to prevent damages to the other parts of the structures. in this paper, deformations, crushing length, peak load, mean force and energy absorption cap...

Abstract Increasing of ballast layer bearing capacity is a widespread problem during the operation and maintenance railway track nowadays. It known that with an increase passed tonnage, tends to become contaminated both by products its own crushing external weeds which rapidly leads strength operational characteristics degradation crushed stone ballast. In this study, attempt was made simulate ...

The increased use of reactive powder concrete (RPC) in structures has attracted attention towards the structural behavior RPC fires. This work examines experimentally performance and NSC columns subjected to 25% ultimate load exposed direct fire flame for a period 30 60 min at various temperature levels. paper aims evaluate maximum level duration that can be withstood by this type columns. resu...