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专项科研基金项目(201100Z3120012)收稿期:2011–11–1520%[1],再如近海钙质砂在海洋工 . 结构物和波浪荷载的共同作用下产生颗粒破碎[2-3]。颗粒破碎往往会引起材料的压缩性变
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颗粒材料破碎行为数值分析方法研究综述
颗粒材料在自然界和工程领域普遍存在, 外载荷作用下颗粒可能发生破碎现象. 颗粒材料的破碎行为会引起其物理力学性质的变化, 给工程和建筑建设带来极大影响. 研究宏、细观尺度
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颗粒材料破碎行为数值分析方法研究综述
间的黏结作用失效时, 颗粒发生破碎行为. 黏结−破碎法在一定程度上推进了颗粒破碎的 研究, 并在岩土工程中解决了一些问题. 如基于黏结− 破碎法, 构建土壤的颗粒簇, 并通过压缩试
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模拟方法更适用于单颗粒破碎和小规模颗粒集合体的 破碎研究。此外，子颗粒不能进一步破碎，使得该方 法模拟颗粒破碎的程度是有限的。 1.2 基于frm的颗粒破碎模拟方法 基
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堆石料颗粒破碎强度的尺寸和形状效应隐式离散元研究
Weibull模型分析了颗粒破碎强度的尺寸和形状效应。 1 非光滑接触动力学法 NSCD方法与传统DEM类似，均考虑颗粒介质 微观上的非连续性，将材料描述为离散颗粒体的堆积， 通
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堆石料剪切过程中的颗粒破碎研究
等向固结过程几乎不产生颗粒破碎。低围压下，颗粒间的翻越和滑移受围压约束较弱，剪切过程中的颗粒破碎不明显。 髙围压下，颗粒间的翻越和滑移受到限制，颗粒间的咬合力显
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2015/2/6 破碎率越高, 颗粒间相互摩擦和碰撞越剧烈,系统能量耗散率越高. 同时, 在循环载荷下系统内颗粒体破碎绝大部分发生在加载初期, 随着颗粒体的分解破碎速率逐渐减小, 系统耗能能力也随之降低. 关键词 ： 离散
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堆石料颗粒破碎强度的尺寸和形状效应隐式离散元研究
采用隐式离散元法（DEM），亦称非光滑接触动力学（NSCD）法，模拟了堆石料单颗粒的一维压缩破碎过程。采用多面体颗粒近似真实堆石料颗粒的不规则棱角状形状，并通过Voronoi空间划分将母颗粒离散成若干多面体
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(PDF) 堆石料颗粒破碎强度的尺寸和形状效应隐式离散
2023/2/1 DEM) ，亦称非光滑接触动力学(NSCD)法，模拟了堆石料单颗粒的一维压缩破碎过程。 采用多面体颗粒近似真实堆石料颗粒的不规则棱角状形状，并通过 ...
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堆石料剪切过程中的颗粒破碎研究
在颗粒破碎过程中,大粒径颗粒首先破碎,破碎的颗粒从大粒径逐渐向小粒径扩展。粒径在0.5 mm以下颗粒的含量始终随剪应变的增大而增多,且增长幅度随着围压的增大而增大。土
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