# Filament to mandrel gap analysis: Resulting gap from filament winding over a cone-cylinder transition mandrel (reference NMTP NO. 93838)

## Abstract

The composites industry employs a method of high speed continuous reinforcement lay-down called filament winding. This is a process where resin impregnated tows, bundles of filament, are wound over a rotating mandrel. The tows, hereafter referred to as filament, are laid down over the rotating mandrel at a prescribed wind angle. Consider a cylindrical filament winding mandrel with conical features such that the filament is tangent to both the cylinder and the cone simultaneously. A gap is formed between the points of tangency. The gap distance measured along a line normal to the filament and intersecting the mandrel`s axis of rotation. The maximum distance occurs between the filament and a point on the intersection of the cylinder and the cone. The problems this paper addresses are: given a cylindrical filament winding mandrel with conical features, what is the gap size for a given wind angle; conversely what is the wind angle for a given gap size; and what does the geometry need to be in the mandrel transition area between the cylinder cone such that the filament remains in contact with the mandrel at all times?

- Authors:

- Publication Date:

- Research Org.:
- Lawrence Livermore National Lab., CA (United States)

- Sponsoring Org.:
- USDOE, Washington, DC (United States)

- OSTI Identifier:
- 10107937

- Report Number(s):
- UCRL-ID-115701

ON: DE94004225

- DOE Contract Number:
- W-7405-ENG-48

- Resource Type:
- Technical Report

- Resource Relation:
- Other Information: PBD: 27 Oct 1993

- Country of Publication:
- United States

- Language:
- English

- Subject:
- 42 ENGINEERING; 36 MATERIALS SCIENCE; WINDING MACHINES; MATHEMATICAL MODELS; COMPOSITE MATERIALS; FABRICATION; NUMERICAL SOLUTION; MECHANICAL ENGINEERING; CURVILINEAR COORDINATES; 420200; 360101; FACILITIES, EQUIPMENT, AND TECHNIQUES; PREPARATION AND FABRICATION

### Citation Formats

```
Geraghty, P.
```*Filament to mandrel gap analysis: Resulting gap from filament winding over a cone-cylinder transition mandrel (reference NMTP NO. 93838)*. United States: N. p., 1993.
Web. doi:10.2172/10107937.

```
Geraghty, P.
```*Filament to mandrel gap analysis: Resulting gap from filament winding over a cone-cylinder transition mandrel (reference NMTP NO. 93838)*. United States. https://doi.org/10.2172/10107937

```
Geraghty, P. Wed .
"Filament to mandrel gap analysis: Resulting gap from filament winding over a cone-cylinder transition mandrel (reference NMTP NO. 93838)". United States. https://doi.org/10.2172/10107937. https://www.osti.gov/servlets/purl/10107937.
```

```
@article{osti_10107937,
```

title = {Filament to mandrel gap analysis: Resulting gap from filament winding over a cone-cylinder transition mandrel (reference NMTP NO. 93838)},

author = {Geraghty, P},

abstractNote = {The composites industry employs a method of high speed continuous reinforcement lay-down called filament winding. This is a process where resin impregnated tows, bundles of filament, are wound over a rotating mandrel. The tows, hereafter referred to as filament, are laid down over the rotating mandrel at a prescribed wind angle. Consider a cylindrical filament winding mandrel with conical features such that the filament is tangent to both the cylinder and the cone simultaneously. A gap is formed between the points of tangency. The gap distance measured along a line normal to the filament and intersecting the mandrel`s axis of rotation. The maximum distance occurs between the filament and a point on the intersection of the cylinder and the cone. The problems this paper addresses are: given a cylindrical filament winding mandrel with conical features, what is the gap size for a given wind angle; conversely what is the wind angle for a given gap size; and what does the geometry need to be in the mandrel transition area between the cylinder cone such that the filament remains in contact with the mandrel at all times?},

doi = {10.2172/10107937},

url = {https://www.osti.gov/biblio/10107937},
journal = {},

number = ,

volume = ,

place = {United States},

year = {1993},

month = {10}

}