【摘 要】
：
在同一应力水平下,灰铸铁的割线模量是压缩时大还是拉伸时大?常见的两类应力——应变曲线给出了相反的答案,如图一和图二所示。六十年代以来,图二为我国大量材料力学书所广
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在同一应力水平下,灰铸铁的割线模量是压缩时大还是拉伸时大?常见的两类应力——应变曲线给出了相反的答案,如图一和图二所示。六十年代以来,图二为我国大量材料力学书所广泛引用。
At the same stress level, is the secant modulus of gray cast iron larger or larger at compression? Common two types of stress-strain curves give the opposite answer, as shown in Figure I and Figure II. Since the 1960s, Figure II is widely cited by a large number of material mechanics books in our country.
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