Method and device for evaluating brittleness and toughness of carbon paper for proton exchange membrane fuel cell

The invention provides a brittleness and toughness evaluation method for carbon paper for a proton exchange membrane fuel cell, and relates to the technical field of fuel cells, the method comprises the following steps: using a three-point bending test method to test the bending performance of the carbon paper to obtain test data; carbon paper bending data and/or a carbon paper bending stress-strain curve model are/is obtained based on the test data, and the carbon paper bending data comprise bending strength, bending modulus and bending deflection; and determining the brittle toughness of the carbon paper based on the carbon paper bending data and/or the carbon paper bending stress-strain model. By adopting the scheme, the flexibility of the carbon paper can be comprehensively and specifically evaluated. 本申请提出了一种质子交换膜燃料电池用碳纸脆韧性评价方法，涉及燃料电池技术领域，其中，该方法包括：使用三点弯曲的测试方法对碳纸进行弯曲性能测试，得到测试数据；基于测试数据得到碳纸弯曲数据和/或碳纸弯曲应力-应变曲线模型，其中，碳纸弯曲数据包括弯曲强度、弯曲模量和弯曲挠度；基于碳纸弯曲数据和/或碳纸弯曲应力-应变模型确定碳纸的脆韧性。采用上述方案的本发明能够全面具体的评价碳纸的柔韧性。