破损
粉碎
机械
下降(电信)
断裂(地质)
断裂力学
粒子(生态学)
材料科学
微粒
法律工程学
粒径
结构工程
复合材料
工程类
机械工程
物理
地质学
化学
冶金
海洋学
化学工程
有机化学
标识
DOI:10.1016/j.powtec.2008.08.011
摘要
Breakage of particulate materials by repeated low-energy stressing events is an important subject in areas such as particle transport – both mechanical and pneumatic – and comminution. Recently, a mathematical model, based on continuum damage mechanics, has been proposed to describe fracture of particles subjected to repeated loading and has been applied to model breakage of single particles by repeated impacts in a drop weight apparatus. The present paper analyzes the model in greater detail by investigating how its only parameter varies with particle size and shape, demonstrating also its validity to describe repeated impacts of particles against an anvil, such as in drop and air-gun tests. In addition, a model is proposed to describe the size distribution of the progeny under low-energy stressing events.
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