根据最大均匀应变求压延系数极限值与许用值的线图

• 作 者: 梁炳文
• 出 处: 锻压技术
• 发表日期: 1988年01期
• 关键词: 曲线关系 均匀应变 线图 线性关系 许用值 成形性能 极限值 理沦 占一 径向应力

各向异性系数r与强化指数n,是两个重要的成形性能参数。一般认为r值与极限压延系数m_λ有密切关系,而n值则不然。其实对于可以用幂次曲线表示应力应变关系的材料。由于n值关系到整个变形过程的发展,故可以从理论上求出n值与m_λ的关系,只是不像r值那样,几乎与m_λ成线性关系,但n值与m_λ值有一定的曲线关系。本线图即是根据理论作出的最大均匀应变εB(即

Anisotropy coefficient r and strengthening index n are two important formability parameters. Generally believed that r value and the limit rolling coefficient m_λ are closely related, while the n value is not. In fact, for the power curve can be used to represent the relationship between stress and strain of the material. As the value of n is related to the development of the whole deformation process, the relationship between n and m_λ can be theoretically obtained. However, it does not have the linear relationship with m_λ, but has a certain curve relationship with m_λ . The line graph is based on the theory of the maximum uniform strain εB (ie