... variances. Approximately one-half of the comparisons showed no statistical difference in bond strength with different void areas. Of those that showed statistically significant difference, an essentially equal number showed higher bond strength with lower void area as those pairs that showed lower bond...

... in a water bath subject to elevated temperature. Test results of three commercial CFRP systems are presented. A discussion of accelerated aging is included in the developmental effort. accelerated aging CFRP bond strength flexural strength tensile strength strength reduction factor durability...

... This research project aims to use reactive powder concrete, RPC. as a new repair material and evaluate its bond strength and bond durability to existing concrete. One accelerated aging environment, namely a freeze-thaw cycle acceleration deterioration test, was selected for the evaluation...

... The paper explores the relationship between elevated moisture in sealant substrates and the ability of sealants to develop and maintain adequate bond strength. Documented sealant adhesive failures, due to moisture conditions of substrates, and the use of various sealant primers and surface...

... cycles as well as delamination length as a function of the number of cycles. composite materials fatigue testing design bond strength skin/flange interface secondary bonding Michael K. Cvitkovich, 1 T. Kevin O'Brien, 2 and Pierre J. Minguet 3 Fatigue Debonding Characterization in Composite...

..., and discusses key issues being considered in the development of an ASTM Standard Specification for Mortar Cement. mortar masonry cement mortar cement compressive strength bond strength John M. Melander 1 and Satyendra K. Ghosh2 DEVELOPMENT OF SPECIFICATIONS FOR MORTAR CEMENT R E F E R E N C E...

... A simple test specimen configuration is proposed to evaluate the bond strength between a skin and secondarily bonded or co-cured stringer or frame when the dominant loading in the skin is flexure along the edge of the frame. The specimen consists of a flange bonded onto a skin, loaded either...

... Masonry cement mortars with additives which entrain various levels of air as well as mortars containing lime were evaluated. A mathematical model was developed describing brick-to-mortar bond strength. Lime mortars, prepared as specified by ASTM with higher proportions of portland cement...

... Adhesive testing is done for several reasons, including quality control, strength comparisons, and obtaining adhesive joint design data. However, the reported bond strengths often vary so much that interpretations are not clear. One reason for this variation is examined in this study. Since...

... Bond strength and water leakage were determined for Types M, S, and N mortars joined to six different brick types. The air content, water retention, and flow rate were varied for each mortar-brick combination. It was found that air content, water retention, and compressive strength were...

... This paper describes a test method for determining the in situ fiber/matrix bond strength of composites. In a sequence of steps, a compressive load is applied to individual fibers oriented normal to a polished surface, and the interface is observed microscopically between loading steps, until...

... bonding tensile adhesion test butt joint stress analysis fracture mechanics testing bond strength finite element fracture G. P. Anderson,^ K. L. DeVries,^ and G. Sharon^ Evaluation of Tensile Tests for Adhesive Bonds REFERENCE: Anderson, G. P., DeVries, K. L., and Sharon, G., "Evalnation...

... formulation which draws upon both these theories is given. adhesion films coatings adhesives bond strength joint strength fracture cracks flaws fracture mechanics interfaces failure locus interfacial separation interfacial failure cohesive failure weak boundary layers R. J. Good 1...

... the role of a fiber surface treatment in enhancing this interface strength. The fiber or rod bond strength specimens usually consist of a single embedded fiber or partially embedded rod in a polymer matrix which is failed by loading the matrix in the first case or by loading the rod in the latter case...