Results 91 to 100 of about 122,069 (205)

Reflective Cracking Study: Second-Level Analysis Report [PDF]

, 2008
This report follows a series of seven first-level Heavy Vehicle Simulator (HVS) testing reports, two laboratory reports on shear and fatigue testing, a forensic investigation report, and a report on the backcalculation of deflection measurements, all of which document an investigation undertaken to validate Caltrans overlay strategies for the ...
Jones, David, Tsai, Bor-Wen, Ullidtz, Per, Wu, R., Harvey, John T, Monismith, Carl L.   +5 more
openaire   +1 more source

Dynamic characteristics and anti-burst mechanism of pre-drilled coal under high strain rate

Meitan xuebao
Pressure relief through coal seam drilling is a common method in coal mine rockburst prevention, with its effectiveness linked to the mechanical properties of coal.
Aiwen WANG, Kailei YANG, Sitao ZHU, Dewei FAN, Zhuangzhuang XIN, Wei ZHANG, Xingfa LIU, Hanqi LIU   +7 more
doaj   +1 more source

Investigation of Stress Wave Propagation and Crack Propagation Characteristics in Intersecting-Joint Mass Under Blasting

Fractal and Fractional
The propagation of stress waves and the evolution of blasting-induced cracks in discontinuous rock mass are strongly influenced by joint characteristics.
Xian Yang, Xiaojun Zhang, Yongbo Wu, Zhuo Li, Wenxue Gao, Feng Wang, Yang Zhang   +6 more
doaj   +1 more source

CRACKS IN ROADWAY COVERING: METHODS FOR IMPROVEMENMT OF CRACK RESISTANCE

Наука и техника, 2011
Crack formation is presently considered as an actual problem in the global practice. The paper provides various approaches pertaining to improvement of asphalt-concrete composition with the purpose to prevent formation of temperature and fatigue cracks ...
I. I. Leonovich, I. S. Melnikova
doaj  

Advancements and future prospects in the fundamental theories of rock blasting research Ⅲ—Interaction mechanism between blast waves and cracks

工程科学学报
The “three relationships (the relationship between rock failure characteristics and blast loading, the superposition effect between blast waves and explosion gas, and the interaction between blast waves and cracks)” are important contents of the rock ...
Peng XU, Renshu YANG, Cheng CHEN, Chenxi DING, Yanbing WANG   +4 more
doaj   +1 more source

An overlay design method for reflective cracking

, 2000
The purpose of this paper is to develop a pavement design method to address reflective cracking using sound mechanistic principles reinforced by practical experience. This paper presents the initial concept of the proposed overlay design method. Test sections have been constructed to assess the effect of overlay thickness, crack width and load to ...
Pais, Jorge C., Sousa, Jorge B., Way, George B., Stubstad, Richard N.   +3 more
openaire   +1 more source

Correlations among ultrasonic propagation factors and fracture toughness properties of metallic materials [PDF]

Empirical evidence was developed to show that a close relation exists among fracture toughness, yield strength, and ultrasonic attenuation properties of metallic materials.
Vary, A.
core   +1 more source

Concepts for interrelating ultrasnic attenuation, microstrucutre and fracture toughness in polycrystalline solids [PDF]

Conceptual models are advanced for explaining and predicting empirical correlations found between ultrasonic measurements and fracture toughness of polycrystalline solids.
Vary, A.
core   +1 more source

Nondestructive evaluation of ceramic and metal matrix composites for NASA's HITEMP and enabling propulsion materials programs [PDF]

In a preliminary study, ultrasonic, x-ray opaque, and fluorescent dye penetrants techniques were used to evaluate and characterize ceramic and metal matrix composites. Techniques are highlighted for identifying porosity, fiber alignment, fiber uniformity,
Generazio, Edward R.
core   +1 more source

Language, listening and learning:critically reflective accountability for INGOs [PDF]

, 2013
Crack, Angela Maria
core   +1 more source