Title

Some Effects Of Compression And Heat On Decelerator Materials

Date

1961

Index Abstract

Contrails and DTIC condensed

Photo Quality

Incomplete

Report Number

WADD TR 60-588

Corporate Author

Fabric Research Laboratories, Inc.

Laboratory

Nonmetallic Materials Laboratory

Extent

62

Identifier

AD0267792

AD0267792

Access Rights

OTS

Distribution Classification

1

Contract

AF 33(616)-6738

DoD Project

7320

DoD Task

73203

DTIC Record Exists

Yes

Distribution Change Authority Correspondence

None

Report Availability

Full text available

Date Issued

1961-06

Abstract

The degradation of some nylon parachute materials, as well as similar materials made from Dacron, glass, an unnamed organic fiber, and stainless steel, when subjected to varying conditions of temperature, pressure and time was studied. Temperatures up to 1000°F, pressures up to 250 p.s.i. and times up to 72 hours were used, but because of the degradation properties of the nylon materials most of the exposures were carried out at 350°F.

The amount of degradation for most of the materials was found to be consistent with that reported by other authors who did not study the influence of pressure. Pressure was less important than temperature or time, but it did tend to decrease degradation somewhat because of the reduction in the amount of oxygen contained within the structure. The increased resistance to degradation of Type 700 nylon was apparent in the results, although it had not been known in advance that any of the materials had been made from anything other than Type 300 nylon.. The improved resistance to degradation of Dacron as compared to nylon is well known. Glass fabrics retained most of their strength up to 500°F, and the unnamed organic fiber up to 600°F (although at 650°F it was badly degraded). Stainless steel showed little change after being exposed to 1000°F for 72 hr.

All of the materials, with the exception of the unnamed organic fiber and steel, showed marked stiffening at 350°F, due primarily to inter-fiber sticking. This seemed in some respects to be a more serious fault than any tensile degradation which might occur, for it could easily prevent successful deployment of a parachute, This fact was made very obvious by examining a parachute which had been pressure-packed and heated in an oven. The stiffness and setting in the folded configuration which the parachute had assumed in the deployment bag made it very doubtful that successful deployment could have been achieved.

Provenance

IIT

Type

report

Subject

Parachute Fabrics

Parachutes

Textiles

Controlled Atmospheres

Dacron

Deceleration

Deformation

Degradation

Fibers

Glass Textiles

High Temperature

Metallic Textiles

Nylon

Organic Materials

Pressure

Rupture

Shear Stresses

Stainless Steel

Tensile Properties

Test Methods

Publisher

Wright-Patterson Air Force Base, OH : Aeronautical Systems Division, Air Force Systems Command, United States Air Force

Distribution Conflict

No

Format

1 online resource

Creator

Abbott, Norman J.