四秩张量包含柔量常数和刚度常数。
The fourth-rank tensors contain the compliance and stiffness constants.
给出了它们的弹性刚度常数和压电应力常数。
The elastic stiffness constants and piezoelectric stress constants of these crystals have been obtained.
该梁具有常数弯曲刚度。
研究结果表明：轮胎的动刚度不是常数，它随着垂直载荷、充气压力的增加而增大；滚动时的动刚度不同于静刚度。
It has been shown that the tire dynamic stiffness is not a constant, which increases with the vertical load and inflation pressure, and it is different from the static one.
证明了在微动范围内，柔性铰链结构的刚度不随输出点的线位移的大小变化而变化，是常数，且刚度与结构的运动方向精度不成简单的线性关系。
The stiffness does not change with the linear displacement. Instead, It is a constant and is not linear with its directional accuracy providing the displacement is microscale.
分析了复合材料面层的弹性常数、泡沫芯层的模量和夹层结构的刚度；
The elastic modulus of foam core and composite skins and the stiffness of sandwich are analyzed.
基于刚度体平均方法，建立了相应的刚度预报模型，得到了三维四向编织复合材料的工程弹性常数。
The model to predict stiffness was then established based on the stiffness volume average method. The elasticity constants of the material were obtained.
基于刚度体平均方法，建立了相应的刚度预报模型，得到了三维四向编织复合材料的工程弹性常数。
The model to predict stiffness was then established based on the stiffness volume average method. The elasticity constants of the material were obtained.
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