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Çѱ¹Áö¹Ý°øÇÐȸ / v.22, no.2, 2006³â, pp.41-53
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¸¶ÀÌÅ©·ÎÇ÷¹ÀÎ ¸ðµ¨À» ÀÌ¿ëÇÑ È°¾ÏÀÇ 3Â÷¿ø ±¸¼º¹æÁ¤½Ä °³¹ß ¹× ¾Ï¼®°Åµ¿ ¸ð»ç
( Microplane Constitutive Model for Granite and Analysis of Its Behavior ) |
| Áö±¤½À;¹®»ó¸ð;ÀÌÀθð; °í·Á´ëÇб³ °ø°ú´ëÇÐ »çȸȯ°æ½Ã½ºÅÛ°øÇаú;°í·Á´ëÇб³ »çȸȯ°æ½Ã½ºÅÛ°øÇаú;°í·Á´ëÇб³ °ø°ú´ëÇÐ »çȸȯ°æ½Ã½ºÅÛ°øÇаú;
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| ÅÙ¼(tensor) À̷п¡ ±âÃÊÇÑ ±âÁ¸ÀÇ ±¸¼º¹æÁ¤½Ä ¸ðµ¨Àº ¾Ï¼®(rock)°ú °°Àº ÁØÃ뼺 Àç·á¿¡¼ ³ªÅ¸³ª´Â º¹ÀâÇÑ º¯Çü¿È(strain softening) °úÁ¤À» ±â¼úÇϱⰡ ¾î·Á¿ì¸ç, ƯÈ÷ ±¸¼Ó¾Ð¿¡ µû¸¥ º¯Çü¿È °úÁ¤ÀÇ º¯È¸¦ Àß ¹Ý¿µÇÏÁö ¸øÇÑ´Ù. º» ¿¬±¸¿¡¼´Â Ȱ¾ÏÀÇ 3Â÷¿ø °Åµ¿À» ¿¹Ãø ºÐ¼®ÇÒ ¼ö ÀÖ´Â ±¸¼º¹æÁ¤½ÄÀ» ¸¶ÀÌÅ©·ÎÇ÷¹ÀÎ ¸ðµ¨À» ÀÌ¿ëÇÏ¿© °³¹ßÇÏ¿´´Ù. Ȱ¾Ï¿¡ ´ëÇÑ ¸¶ÀÌÅ©·ÎÇ÷¹ÀÎ ¸ðµ¨Àº Westerly Ȱ¾Ï°ú Bonnet Ȱ¾ÏÀÇ ÀÏÃà¾ÐÃà ¹× »ïÃà¾ÐÃà ½ÃÇè µ¥ÀÌÅÍ¿Í ÃÖÀûÀ» ÀÌ·çµµ·Ï °³¹ßµÇ¾ú´Ù. °³¹ßµÈ ¸¶ÀÌÅ©·ÎÇ÷¹ÀÎ ¸ðµ¨Àº Ȱ¾ÏÀÇ ÀÏÃà ¹× »ïÃà°Åµ¿À» Àß ¿¹ÃøÇÏ¿´´Ù. ±×¸®°í °³¹ßµÈ Ȱ¾ÏÀÇ ¸¶ÀÌÅ©·ÎÇ÷¹ÀÎ ¸ðµ¨À» À¯ÇÑ¿ä¼Ò¹ý¿¡ Àû¿ëÇÏ¿© ¾Ï¼®Áö¹Ý ±¼Âø½ÃÀÇ ¹ßÆÄ ¸ð»ç¸¦ ÅëÇØ Ȱ¾ÏÀÇ ºñ¼±Çü °Åµ¿ ¹× ¹ßÆÄ½ÃÀÇ ÆÄ¼â ¿µ¿ªÀ» ÇØ¼®ÇÏ¿´´Ù. ¶ÇÇÑ ¸¶ÀÌÅ©·ÎÇ÷¹ÀÎ ¸ðµ¨À» ÀÌ¿ëÇÑ ºñ¼±Çü ÇØ¼®°á°ú¿Í ź¼ºÇؼ® °á°ú¸¦ ºñ±³ ºÐ¼®ÇÑ °á°ú Ȱ¾ÏÀÇ °Åµ¿Àº ºñ¼±Çü¿¡ Å©°Ô ¿µÇâÀ» ¹Þ´Â °ÍÀ¸·Î ³ªÅ¸³µ´Ù. |
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| The brittle materials like rocks show complicated strain-softening behavior after the peak which is hard to model using the classical constitutive models based on the relation between strain and stress tensors. A kinematically constrained three-dimensional microplane constitutive model is developed for granite. The model is verified by fitting the experimented data of Westerly granite and Bonnet granite. The triaxial behavior of granite is well reproduced by the model as well as the uniaxial behavior. We studied the development of the fracture zone in granite during blasting impact using the model with the standard finite element method. All the results obtained from the microplane model developed are compared to those from the linear elasticity model which is commonly used in many researches and practices. It is found that the nonlinearity of rocks sigificantly affects the results of analysis. |
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| Ű¿öµå |
| Blasting;Fractured zone;Material modelling;Microplane model;Plasticity; |
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Çѱ¹Áö¹Ý°øÇÐȸ³í¹®Áý / v.22, no.2, 2006³â, pp.41-53
Çѱ¹Áö¹Ý°øÇÐȸ
ISSN : 1229-2427
UCI : G100:I100-KOI(KISTI1.1003/JNL.JAKO200614222999493)
¾ð¾î : Çѱ¹¾î |
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| ³í¹® Á¦°ø : KISTI Çѱ¹°úÇбâ¼úÁ¤º¸¿¬±¸¿ø |
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