...Yan Peng Shen To accurately assess the damage degree of bridge structures in a fire environment, fire damage test studies were conducted on the C30 and C50 concrete specimens at different temperatures (room temperature, 100°C∼700°C) based on the impact echo method. In addition, the variation rules...

... of the preforms, and friction between the workpiece and the die because of their changes in the mechanical and physical properties. Also, in the compression of PM samples, the damage/fracture occurs in the outer region of the components because of a higher amount of stresses and pores that could affect the damage...

... evaluation of the performance balance in term of “stiffness” versus “relaxation” needs. This paper provides an overview of how Black Space can be further used to provide a greater understanding of the concepts of damage and healing and cracking susceptibility and fracture, and to also quantify the complex...

...Ziyuan Fan; Yongming Sun The fatigue damage of concrete is an important reason for cracking and failure. To comprehensively study fatigue behaviors of concrete under uniaxial compression, cylindrical specimens with two different strength levels were made for cyclic loading tests. The evolution...

...Gongyun Liao; Laura Soares; Hao Wang; Kongqing Qi This study aims to evaluate the damage evolution of poro-elastic road surface with low polyurethane content (PERS-LPC) subjected to cyclic loading with two new damage indicators. A cyclic loading test and dynamic modulus test were conducted on nine...

..., track, and investigate the various stages of micro-cracking and macro-crack damage in concrete. Further, Ib -value has been found to be free from the influence of monitoring conditions. We observed in the present study that the Ib -value began to decrease with the beginning of the formation of new micro...

...F. Hafeez; F. Almaskari This work proposed an image processing method for the measurement of damage and delamination in layered materials. Measurement of the damage and delamination area in composite materials has a significant importance as it provides an estimate of factors for implementation...

... . thermoplastic matrix composites short beam shear test statistics damage aerospace vehicles 29 02 2012 26 09 2013 25 03 2014 Journal of Testing and Evaluation Martin Kadlec,1 Lucie Nova´kova´,2 and Roman Ru zek2 DOI: 10.1520/JTE20120043 An Experimental Investigation of Factors...

... (SFRPC). The experimental results show that the residual fatigue strain of SFRC follows the three-stage law, and the residual fatigue strain of SFRRC develops more slowly than that of SFRPC at the same stress level. A residual fatigue strain equation is suggested. The fatigue damage of SFRC has also been...

... experimentally measured by using rosette strain gages. Durability tests were performed over two different public road surfaces. Fatigue damage assessment was performed and the life of the component was estimated. References Leese , G. E. and Mullin , R. L. , “ The Role of Fatigue Analysis...

... and edge crushes. This study measured the frequency and severity of these and other types of damage that occur to long light-weight packages in the FedEx single parcel environment (3-Day Saver). The results of this study showed that the most frequent type of damage in one-way shipments were creases, which...

...JT Gomez; A Shukla Static and dynamic compression experiments were performed on concrete and granite specimens with various levels of induced damage. Damage was induced into the specimens by repeated impacts from a falling weight and quantified as a measure of damage crack surface area per volume...

... with the aim of a better comprehension of the damage mechanisms up to rupture. Current strain on the middle of the upper and lower faces and acoustic emission (AE) signals is collected. A coupled analysis of the mechanical and physical responses are made related to visual observations. Results are illustrated...

..., extrusions, and intrusions are then formed during the fatigue process. From a global viewpoint, all of the corrosion and fatigue damage appears to be randomly oriented, resulting in a change in the surface roughness. The Laser Speckle Sensor technique is used to detect the minute surface texture change...

... cracks and mechanically small cracks. Each type of crack grows differently, thus requiring a different treatment. 20 06 1997 21 06 1997 small-crack small-crack effect chemical crack size effect stress-intessity threshold damage tolerance modeling mechanically small cracks...

...MA Pompetzki; TH Topper; DL DuQuesnay; MT Yu Intermittent compressive underload and tensile overload tests were carried out on smooth specimens to determine the effect of large stress cycles on the fatigue damage of subsequent small cycles. A load interaction damage model, using a power-law...

... decades. An extrapolation was made for an equal interval to 10 11 cycles. It is proposed that the techniques developed in this paper can be used to generate fatigue data for design of structures using austenitic stainless steels. fatigue (materials) strains stress cycle damage life prediction 316...

... fatigue. All specimens were leached with a heated acid, and fiber breakage was recorded. Correlations are noted between matrix damage and stiffness changes as well as between fiber breakage and strength reduction. References Olster , E. F. and Jones , R. C. , “ Toughening Mechanisms...

...WJ Ostergren A new approach is developed for predicting strain-controlled, low cycle fatigue life at elevated temperature using a proposed energy measure of fatigue damage. This measure of damage, defined as the net tensile hysteretic energy of the fatigue cycle, can be approximated by the damage...

...MR Mitchell; RM Wetzel A case study describes a fatigue damage analysis of a light truck frame. The objective of the analysis is to determine whether an existing frame design can safely accept a 10% increase in load. The analysis, completed in less than a month, incorporates an experimental stress...