Pultrusion is a highly automated process for manufacturing structural composite elements, wherein the produc-tion rate depends on the pulling speed. This study analyzed the influence of pulling speed on the structuralcharacteristics of pultruded glassfiber/epoxy‐vinyl resin 75 × 75 × 6 mm L‐shaped profiles. The profiles werepultruded at three pulling speeds: 200, 400, and 600 mm/min. After fabrication, the spring‐in values of thefabricated profiles were measured; the profiles were examined under a microscope to identify and study theircracking; and the mechanical properties of the pultruded composite were determined. The spring‐in was mea-sured immediately after fabrication and then at intervals of two to three days over a 90‐day period. The spring‐in angle was found to increase with increments in the pulling speed. The profiles produced at the lower pullingspeeds (200 and 400 mm/min) exhibited no significant differences in matrix cracking or mechanical charac-teristics. By comparison, at the high pulling speed (600 mm/min), wherein a large part of the profile is poly-merized after exiting the die, the formation of delamination perpendicular to the matrix cracks was observed.Furthermore, at this pulling speed, there were increased variations in the strength and Young’s modulus valuesand decreased interlaminar shear strength.

Effects of pulling speed on structural performance of L-shaped pultruded profiles

Fausto Tucci;Pierpaolo Carlone;
2021-01-01

Abstract

Pultrusion is a highly automated process for manufacturing structural composite elements, wherein the produc-tion rate depends on the pulling speed. This study analyzed the influence of pulling speed on the structuralcharacteristics of pultruded glassfiber/epoxy‐vinyl resin 75 × 75 × 6 mm L‐shaped profiles. The profiles werepultruded at three pulling speeds: 200, 400, and 600 mm/min. After fabrication, the spring‐in values of thefabricated profiles were measured; the profiles were examined under a microscope to identify and study theircracking; and the mechanical properties of the pultruded composite were determined. The spring‐in was mea-sured immediately after fabrication and then at intervals of two to three days over a 90‐day period. The spring‐in angle was found to increase with increments in the pulling speed. The profiles produced at the lower pullingspeeds (200 and 400 mm/min) exhibited no significant differences in matrix cracking or mechanical charac-teristics. By comparison, at the high pulling speed (600 mm/min), wherein a large part of the profile is poly-merized after exiting the die, the formation of delamination perpendicular to the matrix cracks was observed.Furthermore, at this pulling speed, there were increased variations in the strength and Young’s modulus valuesand decreased interlaminar shear strength.
2021
File in questo prodotto:
Non ci sono file associati a questo prodotto.

I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.

Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11386/4759723
 Attenzione

Attenzione! I dati visualizzati non sono stati sottoposti a validazione da parte dell'ateneo

Citazioni
  • ???jsp.display-item.citation.pmc??? ND
  • Scopus 39
  • ???jsp.display-item.citation.isi??? 34
social impact