4867607 Linkage apparatus having a mechanism for dampening vibrations

Johnson, R.M.; Johnson, RalphV

doi:10.1016/0094-114x(90)90095-2

Cited by 2 publications

(2 citation statements)

References 0 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Both Mischler et al. 19 and Johnson 20 have designed multi-slice rollers, but this type of structure is very complicated. The more commonly used is the integral type, as shown in Figure 2, which has been selected by several manufacturers such as AFPT, Coriolis, and Automated Dynamics.…”

Section: Introductionmentioning

confidence: 99%

Pressure distribution for automated fiber placement and design optimization of compaction rollers

Jiang

2019

Journal of Reinforced Plastics and Composites

View full text Add to dashboard Cite

During automated fiber placement, insufficient compaction pressure leads to low bond strength between layers and may cause defects like bridging. The compaction roller contacts the prepreg and affects the pressure distribution directly. In this article, a model for analyzing the adaptability of rollers to molds is established. Then, compaction pressure distribution on prepreg tows is analyzed by finite element simulation and verified by pressure sensitive film experiment. Based on the simulation results, a calculation method of pressure uniformity is proposed. Moreover, the design parameters of the roller are optimized with an aim of improving pressure uniformity. The results show that the pressure uniformity can be improved significantly by design optimization of the roller, which indicated that higher bond quality between layers is achieved.

show abstract

Section: Introductionmentioning

confidence: 99%

Pressure distribution for automated fiber placement and design optimization of compaction rollers

Jiang

2019

Journal of Reinforced Plastics and Composites

View full text Add to dashboard Cite

show abstract

“…As shown in Figure 1, segmented roller consists of several narrow segments, each segment able to move up or down and retreat individually to conform the surface of mold. 20,21 Besides, each segment is covered with a flexible rubber cover and individually subjected to an air pressure load. Denkena et al 22 used segmented compaction roller in their research and pointed out its structural characteristics, but did not analyze it in detail.…”

Section: Introductionmentioning

confidence: 99%

Compaction pressure distribution and pressure uniformity of segmented rollers for automated fiber placement

Jiang

et al. 2021

Journal of Reinforced Plastics and Composites

View full text Add to dashboard Cite

For automated fiber placement onto molds with complex surfaces, uneven compaction pressure distribution limits tows number in a single sequence and affects layup quality. Compaction roller has a direct influence on the pressure distribution, but the relationship between the two has not been widely explored. In this paper, the segmented compaction roller is used, and a theoretical model of compaction pressure distribution for layup onto general surfaces is established by analyzing the contact between the roller and prepreg layers, followed by experimental validation. Based on the model, single-point pressure uniformity and whole-path pressure uniformity are proposed to quantitatively evaluate the pressure distribution. Furthermore, pressure distribution and pressure uniformity of segmented roller and common roller are compared, as well as the influence of the two pressure distribution on layup quality. The results show that the established model can predict pressure distribution and provide a basis for analyzing layup defects, and segmented rollers apply evener compaction pressure and help to improve layup quality.

show abstract

4867607 Linkage apparatus having a mechanism for dampening vibrations

Cited by 2 publications

References 0 publications

Pressure distribution for automated fiber placement and design optimization of compaction rollers

Pressure distribution for automated fiber placement and design optimization of compaction rollers

Compaction pressure distribution and pressure uniformity of segmented rollers for automated fiber placement

Contact Info

Product

Resources

About