...CTT Hsu; W Punurai; Y Jia; H Bian This paper explores the direct shear behavior between carbon fiber-reinforced polymer (CFRP) laminates and concrete. To study the push-off strength and slip relationship of externally bonded strengthening system, a new test setup is proposed herein...

...M Elzafraney; P Soroushian Fiber-reinforced polymer (FRP) composite bars are corrosion-proof and provide relatively high strength levels when compared with ordinary steel reinforcement. This study aims to provide comprehensive testing techniques that cover a wide range of FRP bar properties...

... relaxation tests to obtain a unique set of material property data relating stress and plastic strain rate. Within the context of these theories, a methodology for assessing the long-term toughness, strength, and ductility of Cr-Mo-V rotor steel alloys is demonstrated in this paper using a series of short...

... with the standard ASTM D 613 method. A comparison of reliability has been made between the two methods using identical test samples. The fact that published repeatability limits for ASTM D 613-84 are much smaller than the reproducibility limits suggests that there can be considerable bias at some laboratories using...

...RS Polvani; CP Reeve; RC Veale A new and simple method is described for the measurement of biaxial deformation with a resolution of 0.025 μm (1 μin.). The basis for this technique is the use of an optical extensometer. References Materials Advisory Board , “ Evaluation Test Methods...

...NA Lazaridis; TG Heberling; ES Harris; EA Lange; AD Wilson ASTM Task Group E24.03.02 on Dynamic Tear Testing evaluated the various procedures used for determining the percent shear fracture surface appearance of dynamic tear (DT) test specimens. The entire gage range of standard DT specimens...

... for a very small load-increment ratio very closely follow those of Schiffman's linear loading theory. A hydraulic loading odometer having provisions for applying linear loading and multipoint pore-pressure measurement is developed. Laboratory linear loading tests on kaolin and Calcuttta silty clay under...

...JM Crissman A new test method is proposed for the determination of the environmental stress-crack resistance of ethylene based plastics. The method incorporates features of both ASTM Test for Environmental Stress-Cracking of Ethylene Plastics (D 1693) and Test for Environmental Stress Rupture...

...T Hollstein; W Schmitt; JG Blauel The elastic compliance C and the J -integral are investigated for single-edge notched tension specimens. The parameters are discussed with respect to crack length, thickness of specimen, load level, stress state, and loading system. Test results for a structural...

... for ductile materials. In the present work, yield loads of mild steel plates with one, three, five, and nine holes in different combinations and orientations have been determined experimentally using an Instron universal testing machine. The yield loads of these specimens were very close to the yield loads...

...K Mosley This paper describes mainly the practical aspects of a simple and rapid method of elastic hoop stressing materials in tubular form using elastomeric inserts. The method can be used for stressing to required limits, for testing to fracture, or for obtaining yield loads. It is extremely...

...GA Woelfl; IW Wei; CN Faulstich; HS Litwack Laboratory testing was conducted to determine the effects of aggregate gradation and asphalt content on the stability and permeability of open-graded asphalt concrete. Test results indicate that permeability increases and stability decreases...

...MM Cobanoglu; G Kardos This study compares various test methods and estimation procedures that are available for determining the fracture toughness of steels. The ASTM Test for Plane-Strain Fracture Toughness of Metallic Materials (E 399), the energy rate test, and the multiple identical specimen...

...LM Barker; FI Baratta A multilaboratory blind comparison testing program evaluated the accuracy of the short rod method of measuring the fracture toughness of metallic materials. Valid comparisons between values measured according to ASTM Standard Method of Test for Plane-Strain Fracture Toughness...

... success was obtained. The results of independent tests on the effects of water and temperature cycling should be considered before the result of freezethaw tests on sulfur concretes and mortars are interpreted. Erratum to this paper appear in 6(2). sulfur concretes mortars (material) strength...

...CH Irvine Research done at Liberty Mutual Research Center consisted of 7090 slip tests in an attempt to show it is possible to determine differences in the slip-resistant qualities of various shoe soles. The tests included seven floor materials, eleven shoe sole materials, three sole pressures...

... techniques. proportional limit stiffness tests stress strain diagrams elastic properties mechanical properties stresses strain rate References Hamstad , M. A. and Gillis , P. P. , “ Effective Strain Rates in Low-Speed Uniaxial Tension Tests ,” Materials Research and Standards...

... design of apparatuses and tests is presented. Two apparatuses are described which allow for the measurement of stress and strain in a two-dimensional state of stressing. Results of preliminary tests are presented and analyzed. clays shrinkage drying elastic properties Poisson ratio tests stress...

...LA Simpson; TR Hsu; G Merrett There is a need for easy-to-fabricate fracture toughness specimens for ceramics. The single-edge notched beam satisfies this need, except that the American Society for Testing and Materials (ASTM) specification for notch root crack depth is difficult to achieve...

...JH FitzGerald; RP Wei A test procedure is outlined by which the rate of fatigue crack growth over a range of stress ratios and stress intensities can be determined expeditiously using a small number of specimens. This procedure was developed to avoid or circumvent the effects of load interactions...