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Çѱ¹Áö¹Ý°øÇÐȸ / v.23, no.3, 2007³â, pp.77-88
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Á÷±³ À̹æÀû »çÁúÅäÀÇ ¹Ì½Ã¿ªÇÐÀû ź¼Ò¼º ¸ðµ¨¸µ: I. Á¤½ÄÈ
( Elastic-plastic Micromechanics Modeling of Cross-anisotropic Granular Soils: I. Formulation ) |
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| º» ¿¬±¸¿¡¼´Â »çÁúÅäÀÇ Åº¼º ¹× ź¼Ò¼º °Åµ¿À» ¸ð»çÇϱâ À§ÇÑ ¹Ì½Ã¿ªÇÐ ±â¹ÝÀÇ ±¸¼º ¸ðµ¨À» °³¹ßÇÏ¿´´Ù. °³¹ß ¸ðµ¨Àº Á¢ÃË ¹æÇâÀÇ °ø°£ ºÐÆ÷¸¦ Åë°èÀûÀ¸·Î ó¸®ÇÑ Á¶Á÷ À̹漺, ÀÀ·Âºñ¿¡ µû¸¥ Á¶Á÷ À̹漺ÀÇ º¯È, °£±Øºñ º¯È¿¡ µû¸¥ Á¢ÃËÁ¡ ¼öÀÇ º¯È, ±×¸®°í ¹Ì½ÃÀû ź¼º-ź¼Ò¼º Á¢ÃË °¼ºÀ» °í·ÁÇÏ¿´´Ù. ±Ý¼Ó Àç·á¿¡ ´ëÇÑ ½ÃÇè°á°ú¸¦ ÀÌ¿ëÇÏ¿© ¹Ì½ÃÀû ź¼Ò¼º Á¢ÃË °¼º ¸ðµ¨À» ¼öÁ÷ Á¢Ã˷°ú ÀÔÀÚÀÇ Ç׺¹ Á¢Ã˷¿¡ ´ëÇÑ °ÅµìÁ¦°ö ÇÔ¼öÀÇ ÇüÅ·ΠÀ¯µµÇÏ¿´´Ù. ¸ðµ¨ º¯¼ö¸¦ Á¤·®ÀûÀ¸·Î Æò°¡Çϱâ À§ÇØ Á÷±³ À̹æ ź¼º °è¼öÀÇ ±Ù»ç½ÄÀ» À¯µµÇÏ¿´´Ù. |
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| A micromechanics-based model to simulate the elastic and elastic-plastic behavior of granular soils is developed. The model accounts for the fabric anisotropy represented by the statistical parameter of the spatial distribution of contact normals, the evolution of fabric anisotropy as a function of stress ratio, the continuous change of the co-ordination number relating to the void ratio, and the elastic and elastic-plastic microscopic contact stiffness. Using the experimental data for metallic materials, the elastic-plastic contact stiffness is derived as a power function of the normal contact force as well as the contact force initiating the yielding of contact bodies. To quantitatively assess microscopic model parameters, approximate solutions of cross-anisotropic elastic moduli are derived in terms of the micromechanical parameters. |
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| Constitutive modeling;Elastic-plastic behavior;Granular soils;Micromechanics; |
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Çѱ¹Áö¹Ý°øÇÐȸ³í¹®Áý / v.23, no.3, 2007³â, pp.77-88
Çѱ¹Áö¹Ý°øÇÐȸ
ISSN : 1229-2427
UCI : G100:I100-KOI(KISTI1.1003/JNL.JAKO200714539254280)
¾ð¾î : ¿µ¾î |
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| ³í¹® Á¦°ø : KISTI Çѱ¹°úÇбâ¼úÁ¤º¸¿¬±¸¿ø |
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