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Title: Effects of parachute-ribbon surface treatments on tensile strength

Abstract

Routine quality-assurance evaluations of nylon ribbons used on test-deployed parachutes revealed tensile-strength degradation had occurred in some of the ribbons. The degradation occurred exclusively in some of the noncritical skirt ribbons with stenciled blue-ink identification markings. Although the strength loss was excessive, the reliability of the parachute was not affected. These results motivated an accelerated-aging study of the effects on tensile strength of not only the inks but also of the sizing chemicals that are used to coat fabrics in parachute construction. Nylon ribbons and Kevlar webbing were treated with these materials and stored both under ambient conditions and at 60/sup 0/C (140/sup 0/F) for periods of time up to eight months. Small increases in strength developed under ambient conditions whereas small decreases developed at elevated temperatures. Samples stored in glass degraded more than those stored in stainless steel. None of these laboratory results correlated with those obtained from parachutes. Possible explanations for the lack of a correlation are provided in this paper. Additional studies are in progress.

Authors:
; ; ; ;
Publication Date:
Research Org.:
Sandia National Labs., Albuquerque, NM (USA)
OSTI Identifier:
5336971
Report Number(s):
SAND-86-0671C; CONF-861050-10
ON: DE86014970
DOE Contract Number:  
AC04-76DP00789
Resource Type:
Conference
Resource Relation:
Conference: 9. aerodynamic decelerator and balloon technology conference (AIAA), Albuquerque, NM, USA, 7 Oct 1986; Other Information: Portions of this document are illegible in microfiche products
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; ARAMIDS; TENSILE PROPERTIES; NYLON; PARACHUTES; MATERIALS TESTING; QUALITY ASSURANCE; SURFACE TREATMENTS; TEXTILES; MATERIALS; MECHANICAL PROPERTIES; ORGANIC COMPOUNDS; ORGANIC POLYMERS; PETROCHEMICALS; PETROLEUM PRODUCTS; PLASTICS; POLYAMIDES; POLYMERS; SYNTHETIC MATERIALS; TESTING; 360403* - Materials- Polymers & Plastics- Mechanical Properties- (-1987); 360405 - Materials- Polymers & Plastics- Degradation & Erosion- (-1987)

Citation Formats

Auerbach, I, Whinery, L D, Johnson, D W, Mead, K E, and Sheldon, D D. Effects of parachute-ribbon surface treatments on tensile strength. United States: N. p., 1986. Web.
Auerbach, I, Whinery, L D, Johnson, D W, Mead, K E, & Sheldon, D D. Effects of parachute-ribbon surface treatments on tensile strength. United States.
Auerbach, I, Whinery, L D, Johnson, D W, Mead, K E, and Sheldon, D D. 1986. "Effects of parachute-ribbon surface treatments on tensile strength". United States.
@article{osti_5336971,
title = {Effects of parachute-ribbon surface treatments on tensile strength},
author = {Auerbach, I and Whinery, L D and Johnson, D W and Mead, K E and Sheldon, D D},
abstractNote = {Routine quality-assurance evaluations of nylon ribbons used on test-deployed parachutes revealed tensile-strength degradation had occurred in some of the ribbons. The degradation occurred exclusively in some of the noncritical skirt ribbons with stenciled blue-ink identification markings. Although the strength loss was excessive, the reliability of the parachute was not affected. These results motivated an accelerated-aging study of the effects on tensile strength of not only the inks but also of the sizing chemicals that are used to coat fabrics in parachute construction. Nylon ribbons and Kevlar webbing were treated with these materials and stored both under ambient conditions and at 60/sup 0/C (140/sup 0/F) for periods of time up to eight months. Small increases in strength developed under ambient conditions whereas small decreases developed at elevated temperatures. Samples stored in glass degraded more than those stored in stainless steel. None of these laboratory results correlated with those obtained from parachutes. Possible explanations for the lack of a correlation are provided in this paper. Additional studies are in progress.},
doi = {},
url = {https://www.osti.gov/biblio/5336971}, journal = {},
number = ,
volume = ,
place = {United States},
year = {Wed Jan 01 00:00:00 EST 1986},
month = {Wed Jan 01 00:00:00 EST 1986}
}

Conference:
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