Browse Prior Art Database

Testing Device

IP.com Disclosure Number: IPCOM000078497D
Original Publication Date: 1973-Jan-01
Included in the Prior Art Database: 2005-Feb-26
Document File: 2 page(s) / 24K

Publishing Venue

IBM

Related People

Dunn, HF: AUTHOR

Abstract

This system allows for the testing of flexible sheet material for strength, tear and elongation properties. The apparatus utilizes a plunger 2 having a 45 degrees conical tip 4, the plunger being connected to a compression testing device, not shown.

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Testing Device

This system allows for the testing of flexible sheet material for strength, tear and elongation properties. The apparatus utilizes a plunger 2 having a 45 degrees conical tip 4, the plunger being connected to a compression testing device, not shown.

In operation, the to-be-tested material 6 is stretched over an open ended cylindrical support 8 and held in place with clamp 10. The cylinder is centered under the plunger and the plunger is lowered at a constant rate. A record of force applied versus distance traveled is maintained. With this system stress is applied to the material omit directionally. Therefore, the orientation of the material is not a factor in its testing.

In this operation elongation is determined by noting the amount of material stretch, from contact to burst. Burst strength is obtained by noting the maximum force applied at the time of material break. Tear resistance is determined from the force necessary to push the plunger through the material after it has burst. Material swelling can be determined using this system, by measuring the change in the contact point of the plunger with the material when the sample is wet and when it is dry. All of this data can be obtained from a single test specimen.

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