#### 1000大阪府ラグビー・クラブチームBリーグ戦におけるマウスガードの装着率の変化

スポーツ歯学 = Journal of sports dentistry (ISSN:1344140X)

vol.12, no.2, pp.67-70, 2009-02-01

1

#### 1000OA繰り返し曲げ変形を受ける同軸ケーブルの芯線およびシールド線の寿命予測に関する研究

vol.80, no.814, pp.TRANS0141-TRANS0141, 2014 (Released:2014-06-25)

12

In this paper, a prediction method of the maximum principal strain of a core/shielding wire contained in a coaxial cable, which is related to the life-cycle of the wire, is proposed. If the central axis of a wire is assumed to be twisted around a virtual cylindrical surface when a coaxial cable is straight and a virtual toroidal surface when the cable is bent, the shape of the wire can be described by the first and the second fundamental form of their surfaces in the differential geometry. The potential energy of the wire, which is bent, twisted, expanded, and/or contracted, is also formulated based on the differential geometry. Friction of the wire against the virtual surface is modeled as a virtual spring in the circumferential direction of the surface and its elastic energy is included in the total potential energy of the wire. Then, the stable shape of the wire can be computed by minimizing its total potential energy under geometric constraints. After that, the maximum principal strain is estimated from the shape of the wire. As a result of simulation, it was founded that a core wire is broken by bending fatigue before the shielding wire is if they have the same radius and rigidity.

#### 1000OA二重撚り構造を考慮した電線の曲げ/ねじれ変形解析

vol.30, no.8, pp.813-821, 2012 (Released:2012-11-15)

19

A modeling method to represent bending/torsional deformation of an electric wire is proposed based on the differential geometry. A twisted wire called a robot cable is used in a prismatic/rotational joint of an industrial robot to transmit signals or electric power. It is composed of a twisted bunch of several strands of many copper wires. The copper wire may be cracked by repeated bending/torsional deformation associated with the movement of a joint and such crack leads to wiring disconnection. To predict the life-cycle of the wires and to prevent such wiring disconnection, it is required to estimate deformation of not only the strands but also the copper wires when the wire is bent/twisted. In this paper, the deformed shape of a wire, which corresponds to a twisted bunch of n strands, is described by 3+2n independent variables and can be derived by minimizing the potential energy of each strand under various constraints. As the relationship between copper wires and their strand is similar with that between strands and their twisted bunch, the deformed shape of each copper wire can be also derived with the same method.

#### 1000エドウィン モイズ著, 弥永昌吉他訳, 数体系入門, 日新出版, 昭和49年, p. 286, 2,500円

vol.58, no.2, 1976-02-01

#### 1000エドウィン モイズ著,弥永昌吉他訳;数体系入門

vol.58, no.1, 1976-01-01

#### 1000OA明治憲法下における警察法理論の構造 : 先験的警察義務の概念の意義と限界

vol.53, no.2, pp.1-52, 2012-11

#### 1000OAヒト胎児の顔面表情筋と顔面神経分布について

vol.61, no.3, pp.322-332, 2001-06-28 (Released:2010-09-09)

11

#### 1000量的な判断常識を備えた人工知能 : 常識値を用いた量的判断

vol.45, pp.97-98, 1992-09-28