| 引用本文: | 杨光松.微结构连续损伤理论.[J].国防科技大学学报,1989,11(3):71-83.[点击复制] |
| Yang Guangsong.Microstructural Continuous Damage Theory[J].Journal of National University of Defense Technology,1989,11(3):71-83[点击复制] |
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| 微结构连续损伤理论 |
| 杨光松 |
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(航天技术系)
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| 摘要: |
| 本文从微结构理论[1]出发，用相对变形描述微结构之间的微空隙和微裂纹引起的材料损伤的影响，得到用损伤张量描述的各向异性损伤的微结构连续损伤力学理论。该微结构损伤模型可化简为目前公认的几种主要损伤模型：如J.p.Cordebois和 F.Sidoroff 的弹性各向异性损伤模型[2]，D.Krajcinovic和G.U.Fonseka 的脆性材料平面裂纹损伤模型[3]，J.Lemaitre 的各向同性损伤理论[4]及Kachanov的以面积减少为变量的损伤模型[5]等。作者运用这一理论对混凝土材料的单向拉、压基本受载情形进行了数值分析，并与 D.Krajcinovic的损伤模型计算结果及实验结果作了比较，所得结果与实验值比较吻合，特别是在失稳后阶段给出了较好描述，初步表明了本理论的有效性和实用性。 |
| 关键词: 微结构损伤 相对变形，损伤力学 |
| DOI： |
| 投稿日期：1988-11-30 |
| 基金项目: |
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| Microstructural Continuous Damage Theory |
| Yang Guangsong |
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(Department of Aerospace Technology)
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| Abstract: |
| In this paper，the microstructural continuous damage theory describing an anisotropic damage field is formulated. With various simplifications，this damage model can be reduced to a few majar models well known at present，such as the elastic anisotropic damage tensor model presented by J.P.Cordebois and F.Sidoroff; the planar micro-cracks damage vector model for brittle matterials by D.Krajcinovic; the isotropic damage scalar model by J.Lemaitre，and the unidimensional damage model by L. M. Kachanov. By means of a tentative test for the present theory，the author uses it for the analysis of the concrete specimen under uni-axial tension and compression，as examplified by D. Krajcinovic. The numerical results obtained show good agreement with the experimental values. |
| Keywords: microstructure damage,relative deformation,damage mechanics |
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