Results 61 to 70 of about 2,859,736 (314)

Area Properties of Strictly Convex Curves

open access: yesMathematics, 2019
We study functions defined in the plane E 2 in which level curves are strictly convex, and investigate area properties of regions cut off by chords on the level curves.
Dong-Soo Kim   +2 more
doaj   +1 more source

Geometrical Influence on Material Properties for Ti6Al4V Parts in Powder Bed Fusion

open access: yesJournal of Manufacturing and Materials Processing, 2023
One major advantage of additive manufacturing is the high freedom of design, which supports the fabrication of complex structures. However, geometrical features such as combined massive volumes and cellular structures in such parts can lead to an uneven ...
Florian Nahr   +10 more
doaj   +1 more source

PBF‐LB/M of Ti‐6Al‐4V: High‐Pressure Solution Treatment and Aging for Applications in a Sustainable Aerospace

open access: yesAdvanced Engineering Materials, EarlyView.
Additive manufacturing (AM) allows great geometric freedom for lightweight components. As parts are progressively optimized exploiting potentials in AM leading in smaller material cross sections, high pressure solution treating and aging (STA) treatments show an enormous potential for strongly improving material properties.
Mika León Altmann   +4 more
wiley   +1 more source

Piezoresistive Monitoring of Carbon Nanomaterial‐Reinforced Epoxy Composites Under Cyclic and Fatigue Loading: A Review

open access: yesAdvanced Engineering Materials, EarlyView.
Carbon nanomaterial‐reinforced epoxy composites exhibit pronounced piezoresistive behavior, enabling intrinsic damage sensing under cyclic and fatigue loading. This review critically compares carbon nanotube and graphene systems, correlating filler content, percolation threshold, and gauge factor with sensing stability and damage evolution.
J. M. Parente   +3 more
wiley   +1 more source

CALCULATION OF PIERCING FORCE AT PRODUCTION OF TUBE

open access: yesЛитьë и металлургия, 2007
Force parameters of drifting cylindrical stock materials process by a mandrel plugging sections of cylindrical, conic, spherical and paraboloidal surfaces are certain.
V. I. Timoshpoiski   +4 more
doaj  

Isoptic curves of conic sections in constant curvature geometries [PDF]

open access: yes, 2013
In this paper we consider the isoptic curves on the 2-dimensional geometries of constant curvature $\bE^2,~\bH^2,~\cE^2$. The topic is widely investigated in the Euclidean plane $\bE^2$ see for example \cite{CMM91} and \cite{Wi} and the references given ...
Csima, Géza, Szirmai, Jenő
core   +2 more sources

Affecting the Properties of Copper–Graphene Electroconductive Composite by Severe Plastic Deformation

open access: yesAdvanced Engineering Materials, EarlyView.
Copper‐based composites enhanced with carbon feature convenient mechanical properties and favorable electric conductivity. Processing via deformation and thermomechanical treatments can introduce advantageous microstructures further enhancing their performance. Herein, copper–graphene powder‐based composites are directly consolidated via rotary swaging
Radim Kocich   +3 more
wiley   +1 more source

Polynomial integration on regions defined by a triangle and a conic

open access: yes, 2010
We present an efficient solution to the following problem, of relevance in a numerical optimization scheme: calculation of integrals of the type \[\iint_{T \cap \{f\ge0\}} \phi_1\phi_2 \, dx\,dy\] for quadratic polynomials $f,\phi_1,\phi_2$ on a plane ...
Sevilla, David, Wachsmuth, Daniel
core   +1 more source

Scrutinizing the General Conic Equation

open access: yesMathematics
We present a general formula that transforms any conic of the form Ax2+Bxy+Cy2+Dx+Ey+F=0, with B≠0, into A′(x′)2+C′(y′)2+D′x′+E′y′+F=0, without requiring the rotation angle θ.
Mauricio Chávez-Pichardo   +2 more
doaj   +1 more source

Experimental Study on the Effects of Artificial Bed Roughness on Hydraulic Parameters of Saline Density Currents [PDF]

open access: yesعلوم و مهندسی آبیاری, 2014
Turbidity currents are often the main process for the transport and deposition of the sediments in narrow, alpine reservoirs. In this research, 63 experiments were performed to investigate artificial bed roughness effects on the saline density currents ...
Peyman Varjavand   +3 more
doaj  

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