金屬拉伸試驗(yàn)試樣的制備

1、標(biāo)準(zhǔn)試樣的類型及尺寸見圖21及表21。表21標(biāo)準(zhǔn)試樣的尺寸單位：mm序號(hào)厚度a寬度b過渡半徑r原始標(biāo)距L0=kS0平行長度Lc=L02b總長度Lt=Lc2h12hBh1h10.720≥2021.1461.1419030≥13.235020.7520≥2021.8861.8819030≥13.235030.820≥2022.6062.6019030≥13.235040.8520≥2023.3063.3019030≥13.235050.92

2、0≥2023.9763.9719530≥13.235060.9520≥2024.6364.6319530≥13.235071.020≥2025.2765.2719530≥13.235081.220≥2027.6867.6819530≥13.235091.520≥2030.9570.9520030≥13.2350102.020≥2035.7375.7320530≥13.2350112.2520≥2037.9077.9020530≥13.2

3、350122.520≥2037.9579.9521030≥13.2350133.020≥2043.7659.2519030≥13.2350144.020≥2054.0068.4320030≥13.2350156.020≥2061.8983.8021530≥13.2350對于厚度0.1mm~3.0mm薄板和薄帶：1優(yōu)先采用比例系數(shù)k=5.65的比例試樣，若比例標(biāo)距小于15mm，建議采用非比例試樣，或按雙方約定的L0值。2頭部寬度應(yīng)至少20