| Autor: |
D'yachkov, I. I., Soluyanov, V. G. |
| Zdroj: |
Strength of Materials; May 1981, Vol. 13 Issue: 5 p620-627, 8p |
| Abstrakt: |
1.A method is proposed for analyzing the failure of compound glass structures making it possible to establish the reasons for and nature of failure.2.A combination of experimental methods (tensometry of structures in the initial loading stages, tests for critical supporting capacity, analysis of cracks and fractures after testing shells) with theoretical studies of the numerical type gives good results, and it is particularly effective for studying actual operating conditions of the structures developed.3.The experiments carried out made it possible to explain mechanisms of crack development and fracture formation in glass specimens as well as in compound structures. It was established that glass element shape (a bar-shaped specimen or a structure in the form of a spherical segment) markedly affects the failure picture.4.Composite glass structures subjected to external hydrostatic pressure fail due to main crack growth in the shell wall in the joint area. Crack formation is caused by spreading of maximum stress loading paths and the presence of surface defects in the glass element. A crack is always oriented perpendicular to the maximum tensile stress.5.Empirical relationships established between failure stress and fracture specular zone dimensions for specimens should be used for rough strength determination for structures made of glass MKR-1; crack paths and fracture formation was established for analysis of stress state according to the nature of failure. |
| Databáze: |
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