crack retardation 中文意思是什麼
crack retardation
解釋
減速- crack : vt 1 使破裂；敲破，敲碎，砸碎（陶器等）；嗑（瓜子等）；【化學】裂化（石油等）。2 把（槍打得、鞭子...
- retardation : n. 遲延，推遲，遲滯；阻礙；遲延程度，妨礙量；【物理學】減速度，妨礙物；【心理學】發育遲緩；遲鈍。
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Experimental study of fatigue crack overload retardation in pmma
有機玻璃疲勞裂紋超載遲滯效應的試驗研究 -
According to our experimental investigations of varying load amplitude, it was found that the phenomena of fatigue crack growth retardation occurred for pmma material following a high overload cycle exerted among the regular constant amplitude load cycles, the ratio of peak value of overload to that of the regular cycles should be over at least 1. 35 to make the retardation taking effect. the experiment scheme for measuring the shutting - off ratio of overload ( defined as the overload ratio when da / dn < 10 - 7 / cyc. )
本文試驗分析了變幅載荷對裂紋擴展的影響，證實了有機玻璃也存在超載遲滯現象，通過金相觀察分析，提出超載遲滯的過程實際上是裂紋前緣萌生新的裂紋的過程的觀點，同時提出超載遲滯的合理的解析，並且給出超載遲滯比，為隨機載荷下疲勞擴展模型的建立提供了一個重要的參數。 -
Viscosified acid has been shown to provide wider crack width and improved acid retardation over that from thin fluid when used in carbonate acidizing
巳被增稠的酸顯視出較寬的裂縫和更好的酸阻滯性能，這就比稀酸液用於碳酸（鹽）的酸化效果更好。
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