For solving the unbalanced loads, the concept of the virtual rigidity is introduced to take account of the tensionstiffening effect.
求解释放荷载过狴中引入虚拟刚度概念,用以摸拟拉伸硬化效应。
2
But when the emotion that leads to stiffening the lip is more intense, and involves strong muscle tension, facial feedback may heighten emotional response.