alternating tension and compression stress
... 交替开关 alternation switch; 交替拉压应力 alternating tension and compression stress; 交替棱条绸 cannele alternatif; ...
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地下工程开挖过程中，在洞室围岩中会产生拉压交替变化区，当地应力过大时，会产生分区破裂化现象。
Tension-compression alternating regions can be formed around the rock mass during excavation process. The zonal disintegration phenomena may be brought when the geostress is too large.
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