THE VOIDING DAMAGE INDUCED IN MATERIAL EMBEDDING FLAWS
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摘要: 本文研究了含有微小裂隙的韧性材料中细观损伤的演化。随外加应力的增大,在裂隙周围的基体中微小空洞不断地萌生并扩展。在一些情况下,由此而形成的内部损伤与仅有大小空洞的损伤有显著的不同特点。结果还表明,具有细观尺度的短裂纹,其损伤作用不宜用裂纹长度作标志。文中最后提出一个材料韧性断裂的判据。Abstract: Study is emphasized on the evolution of microstructural damage induced in material, which initially embeds flaws. Tiny voids surrounding the flaws can be generated and grow large as the external stressing increases. Under certain circumstances, the internal damage caused by such mechanism has drastic difference from that accumulated by pure voiding of large and small sizes. Results indicate that it is not appropriate to use crack length for characterizing the damaging effect of short flaws in microstructura...
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