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断裂力学是研究带裂纹的材料和结构的强度与韧性,以及裂纹扩展规律的一门新学科。目前粉煤灰硅酸盐制品和多孔混凝土制品,在实际应用中曾出现不同程度的裂缝,反映了这些材料的抗裂性能存在一定问题。另一方面,目前对新材料的研究,又往往局限于抗压强度的评价,而忽视了材料的韧性。一般材料的强度与韧性是互相制约的,强度增高导致韧性降低,反之亦然。因此,在这门新学科理论的指导下,研制“强而韧”的新材料,改进和提高现有材料的抗裂性能,是很迫切而有意义的工作。本刊从这一期起,介绍有关这方面的资料,并欢迎读者投稿
Fracture mechanics is a new discipline for studying the strength and toughness of cracked materials and structures, and the law of crack propagation. At present, fly ash silicate products and porous concrete products have appeared cracks of different degrees in practical applications, reflecting the problems of crack resistance of these materials. On the other hand, the current research on new materials is often limited to the evaluation of compressive strength, while ignoring the toughness of the material. The strength and toughness of general materials are mutually constrained, and increased strength leads to lower toughness and vice versa. Therefore, under the guidance of this new discipline theory, it is an urgent and meaningful work to develop “strong and tough” new materials and improve and improve the crack resistance of existing materials. From this issue, the journal introduces information on this aspect and welcomes readers to submit articles.