Abstract
In modern finite element class PLM programs have opportunity to create mixed finite element model by gluing. It allows to create, in particular, for calculations on PC rather small 3D-models of polymeric composite materials (PCM) in bolt joints in which composite in zones of bolt-holes is body-sectional modelled, and behind them – approximately, according to theory of the effective module. Previously it demonstrated possibility of using a mixed 3D-models of PCM in bolt joints through simulations to determine minimum size of zones of more precise PCM simulation while providing same accuracy of calculations. The work is dedicated to identification of trends in characteristics of stress-strained state in areas of bolt-holes when composite materials structure is changed, to reduce absolute values of compression stresses in PCM. Created 24 of 3D-models of one shear two-row bolt joints with PCM (contact problem), which ranged PCM structure (6 options), as well as backlash of bolts with holes (4 values). Unchanged were value of bolt tightening force and tensile force specimen. According to results of calculations to determine distribution of minimum stress and contact pressure (tables, graphs). It is concluded that structure of a PCM plate significantly affects characteristics of stress-strained state of PCM in areas of holes; that we can find a structure that will ensure lowest values of absolute values of compression stress and a greater strength.
Highlights
In particular, for calculations on PC rather small 3D-models of polymeric composite materials (PCM) in bolt joints in which composite in zones of bolt-holes is body-sectional modelled, and behind them – approximately, according to the theory of "the effective module". It demonstrated the possibility of using a mixed 3D-models of PCM in bolt joints through simulations to determine the minimum size of the zones of more precise PCM simulation while providing the same accuracy of the calculations
The work is dedicated to the identification of trends in the characteristics of the stress-strained state in areas of bolt-holes when the composite materials structure is changed, to reduce the absolute values of compression stresses in PCM
It is concluded that the structure of a PCM plate significantly affects the characteristics of the stress-strained state of the PCM in the areas of holes; that we can find a structure that will ensure the lowest values of the absolute values of compression stress and a greater strength
Summary
ɳɨ ɫɬɪɭɤɬɭɪɚ ɩɥɚɫɬɢɧɢ ɡ ɉɄɆ ɫɭɬɬɽɜɨ ɜɩɥɢɜɚɽ ɧɚ ɯɚɪɚɤɬɟɪɢɫɬɢɤɢ ɇȾɋ ɉɄɆ ɭ ɡɨɧɚɯ ɨɬɜɨɪɿɜ; ɳɨ ɦɨɠɧɚ ɡɧɚɣɬɢ ɬɚɤɭ ɫɬɪɭɤɬɭɪɭ, ɹɤɚ ɡɚɛɟɡɩɟɱɢɬɶ ɧɚɣɦɟɧɲɿ ɡɧɚɱɟɧɧɹ ɚɛɫɨɥɸɬɧɢɯ ɜɟɥɢɱɢɧ ɧɚɩɪɭɠɟɧɶ ɫɬɢɫɤɭɜɚɧɧɹ ɬɚ ɛɿɥɶɲɭ ɦɿɰɧɿɫɬɶ ɡ’ɽɞɧɚɧɧɹ. Ɍ ɫɬɚɬɬɿ [9] ɩɪɨɜɟɞɟɧɨ ɞɨɫɥɿɞɠɟɧɧɹ ɡɦɿɲɚɧɢɯ 3D-ɦɨɞɟɥɟɣ ɉɄɆ, ɚ ɫɚɦɟ: ɭ ɡɨɧɚɯ ɨɬɜɨɪɿɜ ɫɬɜɨɪɸɜɚɥɢ 3D ɫɤɿɧɱɟɧɧɨ-ɟɥɟɦɟɧɬɧɿ ɦɨɞɟɥɿ ɉɄɆ ɞɥɹ ɤɨɠɧɨɝɨ ɲɚɪɭ ɉɄɆ, ɚ ɧɚ ɞɟɹɤɿɣ ɜɿɞɫɬɚɧɿ – ɩɟɪɟɯɨɞɢɥɢ ɞɨ ɭɫɟɪɟɞɧɟɧɨɝɨ ɦɨɞɟɥɸɜɚɧɧɹ ɩɪɭɠɧɢɯ ɜɥɚɫɬɢɜɨɫɬɟɣ ɩɥɚɫɬɢɧɢ ɡ ɉɄɆ. Ɇɟɬɚ ɪɨɛɨɬɢ: ɜɢɹɜɥɟɧɧɹ ɬɟɧɞɟɧɰɿɣ ɭ ɡɦɿɧɚɯ ɯɚɪɚɤɬɟɪɢɫɬɢɤ ɇȾɋ ɉɄɆ ɭ ɡɨɧɚɯ ɨɬɜɨɪɿɜ ɩɪɢ ɡɦɿɧɿ ɫɬɪɭɤɬɭɪɢ ɉɄɆ; ɩɿɞɛɿɪ ɫɬɪɭɤɬɭɪ, ɹɤɿ ɡɚɛɟɡɩɟɱɭɸɬɶ ɡɧɢɠɟɧɧɹ ɚɛɫɨɥɸɬɧɢɯ ɜɟɥɢɱɢɧ ɧɚɩɪɭɠɟɧɶ ɫɬɢɫɤɭɜɚɧɧɹ ɬɚ ɛɿɥɶɲɭ ɦɿɰɧɿɫɬɶ ɡ’ɽɞɧɚɧɧɹ.
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