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In mechanical engineering, a fillet is a rounding of an interior or exterior corner of a part design. An interior or exterior corner with an angle or type of bevel, is called a "chamfer". Fillet geometry, when on an interior corner is a line of concave function, whereas a fillet on an exterior corner is a line of convex function (in these cases, fillets are typically referred to as rounds). ==Applications== * Stress concentration is a problem of load-bearing mechanical parts which is reduced by employing fillets on points and lines of expected high stress. The fillets distribute the stress over a broader area and effectively make the parts more durable and capable of bearing larger loads. * For considerations in aerodynamics, fillets are employed to reduce interference drag where aircraft components such as wings, struts, and other surfaces meet one another. * For manufacturing, concave corners are sometimes filleted to allow the use of round-tipped end mills to cut out an area of a material. This has a ''cycle time'' benefit if the round mill is simultaneously being used to mill complex curved surfaces. * Radii are used to eliminate sharp edges that can be easily damaged or that can cause injury when the part is handled.〔Visualization, modeling, and graphics for engineering design By Dennis Kenmon Lieu, Sheryl Sorby, Page 6-31〕 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Fillet (mechanics)」の詳細全文を読む スポンサード リンク
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