体积应力：应力在构件结构中沿空间三个方向上发生，也称三向应力。
Volume-stress: the stress exists in three directions in the volume of the component is called Volume-stress, which is also called three-faces stress.
只能用于面积或体积构件。
VARTM工艺成型的固体火箭发动机壳体复合材料连接裙段构件纤维体积含量较低，复合材料力学性能不佳。
The composite skirts for solid rocket motor shells fabricated by VARTM (VacuumAssisted Resin Transfer Molding) had poor mechanical properties because the fiber volume fraction was very small.
沉管隧道工程中的管段为大体积混凝土构件，结构形式较为复杂。
The pipe section of the immersed tunnel is the large-volume concrete structure, which is complicated in the structure shape.
该工艺通过向气囊内充压，对预成型体施加一定的成型压力，从而提高构件纤维体积含量及力学性能。
This process can add mould pressure to the preforms through inflating the bladder. Thus, higher fiber volume fraction can be achieved.
通过全面检测和分析，指出混凝土骨料中含有的方镁石发生水化反应所引起的体积膨胀，是混凝土构件胀裂的根本原因。
Through some macro and micro inspections, the cause is found out of the volume expansion due to the hydration of magnesia in concrete aggregates.
利用硅橡胶气囊辅助RTM工艺，可以制作纤维体积含量较高的复合材料构件。
The fiber volume of composite parts made by silicon rubber inflatable bag is high.
利用硅橡胶气囊辅助RTM工艺，可以制作纤维体积含量较高的复合材料构件。
The fiber volume of composite parts made by silicon rubber inflatable bag is high.
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