Ogive | EPFL Graph Search

Are you an EPFL student looking for a semester project?

Work with us on data science and visualisation projects, and deploy your project as an app on top of GraphSearch.

An ogive (ˈoʊdʒaɪv ) is the roundly tapered end of a two-dimensional or three-dimensional object. Ogive curves and surfaces are used in engineering, architecture and woodworking. The earliest use of the word ogive is found in the 13th-century sketchbook of Villard de Honnecourt, from Picardy in northern France. The Oxford English Dictionary considers the French term's origin obscure; it might come from the Late Latin obviata, the feminine perfect passive participle of obviare, meaning the one who has met or encountered the other. However, Merriam-Webster's dictionary says it is from the "Middle English oggif stone comprising an arch, from Middle French augive, ogive diagonal arch". In ballistics or aerodynamics, an ogive is a pointed, curved surface mainly used to form the approximately streamlined nose of a bullet or other projectile, reducing air resistance or the drag of air. In fact the French word ogive can be translated as "nose cone" or "warhead". The traditional or secant ogive is a surface of revolution of the same curve that forms a Gothic arch; that is, a circular arc, of greater radius than the diameter of the cylindrical section ("shank"), is drawn from the edge of the shank until it intercepts the axis. If this arc is drawn so that it meets the shank at zero angle (that is, the distance of the centre of the arc from the axis, plus the radius of the shank, equals the radius of the arc), then it is called a tangent or spitzer ogive. This is a very common ogive for high velocity (supersonic) rifle bullets. The sharpness of this ogive is expressed by the ratio of its radius to the diameter of the cylinder; a value of one half being a hemispherical dome, and larger values being progressively more pointed. Values of 4 to 10 are commonly used in rifle bullets, with 6 being the most common. Another common ogive for bullets is the elliptical ogive. This is a curve very similar to the spitzer ogive, except that the circular arc is replaced by an ellipse defined in such a way that it meets the axis at exactly 90°.

About this result

This page is automatically generated and may contain information that is not correct, complete, up-to-date, or relevant to your search query. The same applies to every other page on this website. Please make sure to verify the information with EPFL's official sources.

Related concepts (2)

Related courses (1)

Related lectures (5)

CIVIL-122: Structures I

Le cours présente les bases du comportement des structures, de la détermination des efforts qui y agissent et les principes de leur dimensionnement. Le cours est basé sur la résolution des efforts par

Flamboyant

Flamboyant (from flamboyant) is a form of late Gothic architecture that developed in Europe in the Late Middle Ages and Renaissance, from around 1375 to the mid-16th century. In the French timetable of styles, as defined by French scholars, it is the fourth phase of Gothic style, preceded by Primary Gothic, Classic Gothic and Rayonnant Gothic. It is characterized by double curves forming flame-like shapes in the bar-tracery, which give the style its name; by the multiplication of ornamental ribs in the vaults; and by the use of the arch in accolade.

Islamic architecture

Islamic architecture comprises the architectural styles of buildings associated with Islam. It encompasses both secular and religious styles from the early history of Islam to the present day. The Islamic world encompasses a wide geographic area historically ranging from western Africa and Europe to eastern Asia. Certain commonalities are shared by Islamic architectural styles across all these regions, but over time different regions developed their own styles according to local materials and techniques, local dynasties and patrons, different regional centers of artistic production, and sometimes different religious affiliations.

Explores the evolution of Gothic surfaces in architecture, focusing on construction techniques and innovative solutions developed over time.

Explores the design of flying buttresses and pointed arches in Gothic architecture, emphasizing reaction forces and weight distribution.

Delves into the intricate geometry of Gothic architecture, exploring surfaces with variable and constant curvature and the historical evolution of vaults.