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首页> 外文期刊>Planetary and space science >Electrical stress and strain in lunar regolith simulants
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Electrical stress and strain in lunar regolith simulants

机译：月球重石模拟物中的电应力和应变

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Experiments to entrain dust with electrostatic and fluid-dynamic forces result in particulate clouds of aggregates rather than individual dust grains. This is explained within the framework of Griffith-flaw theory regarding the comminution/breakage of weak solids. Physical and electrical inhomogeneities in powders are equivalent to microcracks in solids insofar as they facilitate failure at stress risers. Electrical charging of powders induces bulk sample stresses similar to mechanical stresses experienced by strong solids, depending on the nature of the charging. A powder mass therefore "breaks" into clumps rather than separating into individual dust particles. This contrasts with the expectation that electrical forces on the Moon will eject a submicron population of dust from the regolith into the exosphere. A lunar regolith will contain physical and electrostatic inhomogeneities similar to those in most charged powders.
机译：用静电力和流体动力夹带灰尘的实验产生了聚集体而不是单个尘粒的颗粒云。这是在有关弱固体的粉碎/破损的格里菲斯-弗劳尔（Griffith-flaw）理论的框架内进行解释的。粉末中的物理和电气不均匀性等效于固体中的微裂纹，只要它们促进应力提升时失效即可。粉末的充电会引起大量样品应力，这与强固形物所承受的机械应力相似，具体取决于充电的性质。因此，粉末团块“破碎”成团块，而不是分离成单独的灰尘颗粒。这与预期的相反，月球上的电动势会将亚微米级的尘埃颗粒从重灰石中喷入大气层。月牙长石将包含与大多数带电粉末相似的物理和静电不均匀性。

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