According to this view, this paper puts forward a simple hypothesis, which is in the field, size decided the crack propagation speed.
根据这种观点，本文提出了一种简便的假设，是一家生产领域，大小决定了裂纹扩展速度。
The results show that the method is simple and convenient, and can be used for measuring the crack propagation speed at high loading rate.
结果表明本文建立的方法简便易行，可用于高加载速率下裂纹扩展速度的测定。
The study shows that the coupled elastic and electric fields inside piezoelectric med ia depend on the speed of the crack propagation, and have singularity at the cr ack tip.
研究表明：介质内的耦合场与裂纹运动速度有关，在裂纹尖端有奇异；
The study shows that the coupled elastic and electric fields inside piezoelectric med ia depend on the speed of the crack propagation, and have singularity at the cr ack tip.
研究表明：介质内的耦合场与裂纹运动速度有关，在裂纹尖端有奇异；
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