The effect of the fiber surface treatment on composite material shear
behavior is evaluated. The Iosipescu shear test is employed to measure
the in-plane shear properties of unidirectional AU4- and AS4-BMI/PES,
as well as IM8-BMI/PES with 50%, 100% and 400% fiber surface treatmen
t. In addition, a meso-indentation technique is employed to assess the
effect of degrees of surface treatment on interfacial shear strengths
. It was found that the in-plane shear properties of AU4- and AS4-BMI/
PES laminates are essentially the same. The in-plane shear properties
of IM8-BMI/PES laminates with 50%, 100% and 400% fiber surface treatme
nt are approximately the same. Meso-indentation results confirm the Io
sipescu shear strengths obtained.