【摘要】：在Volokh軟化模型的基礎(chǔ)上,考慮顆粒材料的變形和破壞機(jī)制,認(rèn)為顆粒材料以剪切變形和破壞為主,提出了表示軟化程度的軟化因子概念,發(fā)展了兩種能夠部分表征顆粒材料力學(xué)行為特征的軟化模式,并基于ABAQUS用戶材料子程序(UMAT)開發(fā)相應(yīng)程序.數(shù)值算例考察了上述模型模擬顆粒材料應(yīng)變局部化現(xiàn)象和軟化現(xiàn)象的能力.結(jié)果表明了所建議模型的有效性和可行性.
[Abstract]:On the basis of Volokh softening model, considering the deformation and failure mechanism of granular materials, it is considered that the shear deformation and failure are the main factors for granular materials, and the concept of softening factor is put forward to show the softening degree. Two softening modes which can partially characterize the mechanical behavior of granular materials have been developed and the corresponding programs have been developed based on ABAQUS user material subroutine (UMAT). Numerical examples are given to investigate the ability of the above model to simulate strain localization and softening of granular materials. The results show that the proposed model is effective and feasible.
【作者單位】： 武漢大學(xué)土木建筑工程學(xué)院;
【基金】：國家自然科學(xué)基金資助項(xiàng)目(10802060;11172216;11472196) 國家重點(diǎn)基礎(chǔ)研究發(fā)展計(jì)劃項(xiàng)目(2010CB731502) 湖北省自然科學(xué)基金資助項(xiàng)目(2013CFB287)
【分類號(hào)】：O343
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本文編號(hào)：2468480