Wall Definition

@WALL_DEFINITION {
@WALL_NAME {WallName} {
@CURVE_NAME {CurveName}
@SOLID_PROPERTY_NAME {SolPropName}
@ADD_DROP_ZONE_SIZE {ADZone}
@MESH_DENSITY {md}
@COMMENTS {CommentText}
}

Introduction

Figure 1. Configuration of a wall.

The wall is a structural component used to define the cross-section of a beam in the component builder approach. Typically, the cross-section is composed of a number of different walls, which can be connected using wall connectors or adhesives.

Figure 1 shows the configuration of a wall. It consists of a quadrangular area whose configuration conforms to the curve, CurveName, that defines the shape of one of its sides. The unit tangent and normal vectors to the curve are denoted t and n, respectively. Typically, the wall is a “thin wall,” i.e., the length of the wall along the curve is far larger than its thickness along unit vector n.

Notes

  1. The shape of one side of the wall is defined by curve CurveName. This curve is often refered as the “outer mold line” (OML), i.e., the shape of the mold on which the composite material layers will be placed.
  2. The physical properties of the materials used in the wall are described by solid property SolPropName. Both homogeneous materials or layers of advanced composite materials can be defined.
  3. The layers of composite material do not necessarily span the entire length of the mold line defined by curve CurveName. Typically, layers are added and dropped at various locations along the mold line, as defined in the description of the lay-up. The size of the add-drop zone size, ADZone, is defined here.
  4. The mesh density used to defined the meshing of the wall is defined directly here.
  5. The layers are stacked in the direction defined by unit normal vector n. Layer 1 is the closest to the mold line, Layer n is at the largest distance from the mold line, in the positive direction of unit normal vector n.
  6. It is possible to attach comments to the definition of the object; these comments have no effect on its definition.