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本文通过对PMMA蠕变试件断口的SEM分析,把材料蠕变破坏过程中主裂纹的发展划分为三个阶段,提出了决定材料承载寿命的因素。
Based on the SEM analysis of the fracture of PMMA creep specimens, this paper divides the development of the main cracks during the creep failure of the material into three stages and puts forward the factors that determine the bearing life of the material.