基于D-P损伤本构模型的修正优化

发布时间：2018-03-15 09:27

本文选题：岩石　切入点：损伤本构模型　出处：《机械强度》2017年04期 　论文类型：期刊论文

【摘要】：目前,基于D-P(Drucker-Prager)准则的岩石损伤本构模型在研究岩石损伤本构领域已经占据主导地位,其优越性日渐突出。主要以D-P准则的岩石损伤本构方程为基础进行分析,发现其在某些地方存在很大误差。在问题分析的众多因素中,发现泊松比是造成误差极其重要的因素。根据实验数据结果分析,发现岩石类材料的泊松比是一个不稳定值。由于泊松比用于D-P准则的损伤本构方程的全程,首次提出了类泊松比μ*(quasi-poisson’ratio)的概念,导出类泊松比的计算公式,并引入D-P准则的岩石损伤本构模型进行验证,证明在岩石中引入类泊松比的损伤本构模型更加符合实际。修正后的新模型对于软件数值分析和应用有新的突破,类泊松比概念的提出也将引起岩石力学在众多方面的改进,对岩石力学的发展有重要意义。
[Abstract]:At present, the rock damage constitutive model based on D-P Drucker-Prager-based criterion has occupied a dominant position in the research of rock damage constitutive model, and its superiority is becoming more and more prominent. The analysis is mainly based on the rock damage constitutive equation of D-P criterion. It is found that there are a lot of errors in some places. Among the many factors in problem analysis, it is found that Poisson's ratio is the most important factor to cause the error. It is found that the Poisson's ratio of rock-like materials is an unstable value. Since Poisson's ratio is used in the whole process of damage constitutive equation of D-P criterion, the concept of Poisson's ratio 渭 quasi-Poisson ratio is proposed for the first time, and the calculation formula of Poisson's ratio is derived. The damage constitutive model of rock based on D-P criterion is verified. It is proved that the damage constitutive model with Poisson's ratio in rock is more practical. The modified model has a new breakthrough for numerical analysis and application of software. The concept of Poisson's ratio will also lead to the improvement of rock mechanics in many aspects, which is of great significance to the development of rock mechanics.
【作者单位】：西南石油大学机电工程学院;宝鸡石油机械有限责任公司;
【基金】：国家自然科学基金项目(51174173)资助~~
【分类号】：TU45

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