Stress-strain data for aluminum 6061-T651 from 9 lots at 6 temperatures under uniaxial and plain strain tension

This dataset contains engineering stress-engineering strain curves for aluminum 6061-T651 test specimens prepared from bars of material from 9 lots available commercially. Multiple specimens from each lot were tested in steady-state tension at 6 different temperatures (i.e., the temperature was maintained constant through the test) under uniaxial and plane strain tension stress states. The files are named with seven groups of characters according to the following format x_xxx_x_x_xxx_xxx_xx. The first letter indicates the specimen type - 'T' is for uniaxial tension and 'P' is for plane strain, the next three numbers indicate the temperature of the test, the next letter indicates the lot, the next number indicates the specimen number within that lot. These 4 groups of characters are enough to uniquely identify any file. The additional three groups of characters are for correspondence with the numbering scheme used while performing the tests and can be disregarded. The strains are obtained using digital image correlation using a 2-inch gauge length for the tension specimen and a 0.25-inch gauge length for the plane strain specimen. The strains are an average of several measurements (at approximately 350-micron intervals) across the width of the gauge section over the gauge length. The stresses are computed using force readings from the load cell and cross-sectional area measurements of the test specimen.本数据集收录了6061-T651铝合金试样的工程应力-工程应变曲线，试样均取自9种商用市售棒材批次。每个批次制备多组试样，分别在6种恒定试验温度（试验全程维持温度恒定）下，于单轴拉伸与平面应变拉伸两种应力状态中开展稳态拉伸测试。 所有文件采用`x_xxx_x_x_xxx_xxx_xx`的七段字符格式命名：第一段首字母代表试样类型，其中'T'对应单轴拉伸试样，'P'对应平面应变拉伸试样；后续三位数字代表试验温度；紧随其后的字母代表材料批次；再之后的数字代表该批次内的试样编号。仅上述四段字符即可唯一标识任意一个文件，剩余三段字符仅用于匹配试验过程中的编号体系，可忽略不计。 应变数据通过数字图像相关法（Digital Image Correlation）获取：单轴拉伸试样的标距为2英寸，平面应变拉伸试样的标距为0.25英寸；应变值为标距段宽度方向上、沿标距长度方向每隔约350微米采集一次测量结果所得的平均值。 应力值通过测力传感器（load cell）采集的力读数与试样横截面面积测量值计算得到。