Relea 10.0 Documentation for ANSYS
SHELL63
Elastic Shell
弹性壳单元
SHELL63 Element Description
SHELL63单元描述
SHELL63 has both bending and membrane capabilities. Both in-plane and normal loads are permitted. The element has six degrees of freedom at each node: translations in the nodal x, y, and z directions and rotations about the nodal x, y, and z-axes. Stress stiffening and large deflection capabilities are included. A consistent tangent stiffness matrix option is available for u in large deflection (finite rotation) analys. See SHELL63 in the ANSYS, Inc. Theory Reference for more details about this element. Similar elements are SHELL43
and SHELL181 (plastic capability), and SHELL93 (midside node capability). The ETCHG command converts SHELL57 and SHELL157 elements to SHELL63.
SHELL63既具有弯曲能力又具有膜力，可以承受平面内荷载和法向荷载。本单元每个节点具有6个自由度：沿节点坐标系辣椒炒鸡的做法X、Y、龟头炎用药Z方向的平动和沿节点坐标系X、Y、Z轴的转动。应力刚化和大变形能力已经考虑在其中。在大变形分析（有限转动）中可以采用不变的切向刚度矩阵。其详细的特性请参考Section 14.63 of the ANSYS Theory Reference。 近似的单元有SHELL43，SHELL181(塑性能力)，SHELL93（包含中间节点）ETCHG命令可以将SHELL57纤维食物有哪些和SHELL157单元转换为交通安全顺口溜SHELL63单元。
Figure 63.1 SHELL63 Geometry
Figure 63.1 shell63几何描述
xIJ = Element x-axis if ESYS is not supplied.如果无ESYS则xIJ为单元X轴
x = Element x-axis if ESYS is supplied. 如果有ESYS则为单元X轴
SHELL63 Input Data
SHELL63输入数据
The geometry, node locations, and the coordinate system for this element are shown in Figure 63.1: "SHELL63 Geometry". The element is defined by four nodes, four thickness, an elastic foundation stiffness, and the orthotropic material properties. Orthotropic material directions correspond to the element coordinate directions. The element coordinate system orientation is as described in Coordinate Systems. The element x-axis may be rotated by an angle THETA (in degrees).
单元SHELL63的几何形状、节点位置及坐标系如图63.1所示，单元定义需要四个节点、四
个厚度、一个弹性地基刚度和正交各向异性的材料。正交各向异性的材料参数的方向依据单元坐标系，单元坐标系方向见Coordinate Systems章节。单元的X电视柜一般多宽轴可以转动一个角度THETA（度数）。
The thickness is assumed to vary smoothly over the area of the element, with the thickness input at the four nodes. If the element has a constant thickness, only TK(I) need be input. If the thickness is not constant, all four thickness must be input.
在单元的面内，其节点厚度为输入的四个厚度，单元的厚度假定为均匀变化。如果单元厚度不变，只需输入TK(I)即可；如果厚度是变化的，则四个节点的厚度均需输入。
The elastic foundation stiffness (EFS) is defined as the pressure required to produce a unit normal deflection of the foundation. The elastic foundation capability is bypasd if EFS is less than, or equal to, zero.
弹性地基刚度(EFS)定义：在地基法线方向产生一个单位位移所需要的压力。如果EFS小于或者等于0，则弹性地基的效应将被忽略。
For certain nonhomogeneous or sandwich shell applications, the following real constants are provided: RMI is the ratio of the bending moment of inertia to be ud to that calculated from the input thickness. RMI defaults to 1.0. CTOP and CBOT are the distances from the middle surface to the extreme fibers to be ud for stress evaluations. Both CTOP and CBOT are positive, assuming that the middle surface is between the fibers ud for stress evaluation. If not input, stress are bad on the input thickness. ADMSUA is the added mass per unit area.
对于一些非均匀或者夹心壳的情况，本单元提供了以下实常数：RMI是由壳体本身的抗弯刚度与按照输入厚度计算得出的抗弯刚度的比值，RMI默认为1.0白羊座男生喜欢什么样的女生。CTOP和 CBOT是从中面到上下两面纤维的距离以用来计算应力。CTOP和 CBOT均为正数，假定中面位于用来计算应力的上下两面纤维的中间，如果没有输入CTOP和 CBOT，应力根据输入的厚度进行计算。ADMSUA为单位面积上的附加质量。个性特点有哪些
Element loads are described in Node and Element Loads. Pressures may be input as surface loads on the element faces as shown by the circled numbers on Figure 63.1: "SH
ELL63 Geometry". Positive pressures act into the element. Edge pressures are input as force per unit length. The lateral pressure loading may be an equivalent (lumped) element load applied at the nodes (KEYOPT(6) = 0) or distributed over the face of the element (KEYOPT(6) = 2). The equivalent element load produces more accurate stress results with flat elements reprenting a curved surface or elements supported on an elastic foundation since certain fictitious bending stress are eliminated.
单元的荷载描述见Node and Element Loads（节点荷载和单元荷载）。压力可以作为表面荷载，按照图SHELL63.1上显示的圆圈内数字表示的单元表面输入。压向单元的荷载为正荷载。边界压力输入值为单位长度上的力。侧向荷载可能是一个作用在节点上的等效（集中）单元荷载(KEYOPT(6) = 0)，或者是在分配在单元面上(KEYOPT(6) = 2)。在以平面单元代替曲面的情况或者单元支撑在弹性地基上时，因为消去了一些假定的弯曲应力，等效单元荷载可以得到更为精确的应力结果。
Temperatures may be input as element body loads at the "corner" locations (1-8) shown in Figure 63.1: "SHELL63 Geometry". The first corner temperature T1 defaults to TUNIF. I
f all other temperatures are unspecified, they default to T1. If only T1 and T2 are input, T1 is ud for T1, T2, T3, and T4, while T2 (as input) is ud for T5, T6, T7, and T8. For any other input pattern, unspecified temperatures default to TUNIF.
温度可以作为单元的体积力作用在图SHELL63.1上的（1～8）角点，第一个角点温度T1默认为TUNIF，如果其他角点的温度没有指定，则默认为T1，如果只有指定T1和T2，T1代表T1, T2, T3, T4；o型血是熊猫血吗 T2 代表T5, T6, T7, T8，如有其他输入格式，未指定的温度均默认为TUNIF。
