Comparative experimental investigation of design allowable of composite materials based on k-sample Anderson–Darling test

The design allowable values of composite materials were experimentally studied by specimen from two different suppliers, and the test data of grouped samples for bending strength, tensile strength, and interlaminar shear strength were obtained. The k-sample Anderson–Darling test method was adopted to analyze the test results, and the correlation conclusions of bending strength, tensile strength, and interlaminar shear strength were achieved. The test and analysis results show that the fluctuation range of bending strength, tensile strength, and interlaminar shear strength of composite specimen manufactured by the two suppliers is small, and the error range is less than 10.5%. The A-D test critical value ADC corresponding to bending strength, tensile strength, and interlayer shear strength is greater than the corresponding test statistical value ADK. The test data of the samples processed by the two suppliers have strong correlation, which can be considered to be from the same population. The above conclusions provide guidance of ideas and methods for the strength performance consideration of composite structure selection and substitution.