Abstract The joining techniques between carbon fiber reinforced polymer (CFRP) and metal are of great importance in many areas structural mechanics where the optimization weight, rigidity, strength is a necessity (such as aeronautics, vehicles, energy generation, biomechanics). As result, several types metal-composite joints have been manufactured using different methods, with 3D anchor solutio...

In most cases, structural engineers assume a concrete floor to be a rigid diaphragm. Although this simplification is in most cases acceptable, it should be noted that such an assumption may be distrusted due to certain problems. Concrete structures with staggered shear walls are among those whose analysis should be conducted with special concern for the behavior of their floor diaphragms. Howev...

In buildings with triangular plan, the center of mass and rigidity cannot geometrically match all possible directions of the earthquake. This will result in torsional moments in the stories causing the building to rotate around the center of rigidity. In this paper, via response spectrum analysis (RSA) and nonlinear static analysis, the seismic behavior of 5-, 10- and 15-story steel structures ...

Using very weak criteria for what may constitute a noncommutative geometry, I show that a pseudo-Riemannian manifold can only be smoothly deformed into noncommutative geometries if certain geometric obstructions vanish. These obstructions can be expressed as a system of partial differential equations relating the metric and the Poisson structure that describes the noncommutativity. I illustrate...

Considering the future shortage of natural aggregates, various researchers have promoted recycling by-products into asphalt pavement types. This paper a double-recycling technique, where thermally treated waste silt was used as filler for bituminous skeleton and grouting material geopolymer-based semiflexible pavement. Semiflexible pavements (SFP) inherit flexibility common simultaneously benef...

We find that the classical failure criteria, i.e., maximum normal stress criterion, Tresca criterion, Mohr-Coulomb criterion, and von Mises criterion, cannot satisfactorily explain the tensile fracture behavior of the bulk metallic glass (BMG) materials. For a better description, we propose an ellipse criterion as a new failure criterion to unify the four classical criteria above and apply it t...

Topological rigidity is an analogue of the Baum-Connes conjecture, and is motivated by Mostow rigidity and Margulis superrigidity. I will discuss some of the places where this heuristic reasoning fails, and the rigidity shows some cracks – that are rather different than the places where strong forms of the Baum-Connes conjecture fails.

1 The Proof Modulo some Analysis 1.1 Statement of the Result Given any metric space (X, d), a map H : X → X is BL (bi-lipshitz) if there is some constant K > 0 such that d(H(x), H(y)) ∈ [K, K] d(x, y), ∀x, y ∈ X. (1) Here is a limited form of Mostow Rigidity: Theorem 1.1 (Mostow) Suppose that M1 and M2 are both compact hyperbolic 3-manifolds. If there is a BL map f : M1 → M2 then there is an is...

During orthodontic tooth movement, the periodontal ligament (PDL) is exposed to continuous mechanical strain. However, many researchers have applied cyclic tensile strain, not continuous tensile strain, to PDL cells in vitro because there has been no adequate device to apply continuous tensile strain to cultured cells. In this study, we contrived a novel device designed to apply continuous tens...

Abstract A thermoplastic polyurethane (TPU) series for automotive panels with high durability have been newly synthesized using the reacting process based on polyester polyol (BTG), polycaprolactone triol (PCL), hexamethylene diisocyanate (HDI), isophorone (IPDI), and 1,4-butanediol chain extender as a function of NCO/OH ratio (NCO index). The dependence varying NCO index TPUs tensile strength ...