Date of Award

8-2015

Degree Name

Master of Science in Engineering

Department

Chemical and Paper Engineering

First Advisor

Dr. Andrew Kline

Second Advisor

Dr. Said Abubakr

Third Advisor

Dr. James Springstead

Access Setting

Masters Thesis-Open Access

Abstract

Acrylic foam pressure sensitive adhesive (PSA) tapes are used in various applications as an alternative of mechanical fasteners, especially in areas like structural bonding which requires demanding bond strength and durability.

This research focuses on comparing design values of acrylic foam PSA using static shear test method and dynamic shear test method in accordance of J0MP0164 standard specification. Static shear test has lots of disadvantages; but on the other hand it is the test that mimics the real life usage of a tape in a real life application. Dynamic shear test is a faster way of testing and gives a full insight of the PSA tape deformation behavior.

The relationship between static load and failure time at various loads obtains a mathematical model to predict long-term load carrying performance of a PSA. That model is compared to dynamic shear mathematical models to check differences in obtained design values.

The peak stress and time at peak stress on a stress-strain diagram at various shear rate tests were used to manipulate a mathematical model to compare it to the static shear model and see how the two models correlate.

Two other dynamic shear models were investigated. The first model presents the relationship between peak stress and actual rupture time, and the second model is relationship between peak stress and theoretical rupture time. These two models did not show a noticeable differences in estimated design values. On the other hand, the design values obtained from these models were 10-15% higher than static shear design values.

It was found that the estimated design values using a dynamic shear method is only 3% higher than the estimated design values from static shear method. Not only that, the differences in design values are consistent when predicted for 1 year to 25 years.

The results support using dynamic shear test method as an industrial technique to predict long-term carrying performance of PSA tape as an alternative method to static shear test.

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