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首页> 外文期刊>Journal of thermal stresses >HYGROTHERMAL STRESS OF CLAY IN A HIGH-SPEED DRYING FURNACE
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HYGROTHERMAL STRESS OF CLAY IN A HIGH-SPEED DRYING FURNACE

机译：高速干燥炉中粘土的水热应力

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摘要

Hygrothermal stresses in a clay put in a high-speed drying furnace are discussed. This practical clay is treated as a hygrothermal elastic material that has a simple shape of an infinite body with a bored cylindrical hole. Thus, a theory of hygrothermoelasticity with uneven distributions of temperature and moisture concentration is used to find a closed-form hygrothermal hoop stress in such a body and to illustrate the solution graphically. For a clay put into a high-speed drying furnace, the effects of thermal expansion and drying contraction on the clay cracking are discussed in detail. In particular, it is shown that the effect of thermal expansion on cracking is much smaller (only a few percent) than that of drying contraction, even at high temperatures. As a result, the clay cracking under practical drying conditions would be caused by a drying stress concentration.
机译：讨论了放置在高速干燥炉中的粘土中的湿热应力。这种实用的粘土被视为一种吸湿热弹性材料，具有无限简单的形状，带有无限大的圆柱孔。因此，使用具有温度和水分浓度不均匀分布的吸湿热弹性理论来找到这种物体中的闭合形式的吸湿热箍应力，并以图形方式说明该解决方案。对于放入高速干燥炉中的粘土，将详细讨论热膨胀和干燥收缩对粘土开裂的影响。特别是，即使在高温下，热膨胀对裂纹的影响也要比干燥收缩小得多（仅几个百分点）。结果，在实际干燥条件下的粘土开裂将由干燥应力集中引起。

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