Tool clamp for testing low-temperature mechanical tensile properties of fiber reinforced composite material

The invention provides a tool clamp for testing low-temperature mechanical tensile properties of a fiber reinforced composite material. The tool clamp is composed of an upper chuck and a lower chuck which are the same in shape and structure and are placed opposite to each other; each of the upper chuck and the lower chuck is composed of clamping sleeves, bolts and two tooth elements; inner side surfaces of the two clamping sleeves face to each other; grooves which are symmetrically distributed are formed in the opposite inner sides of the upper and lower clamping sleeves; the grooves are internally provided with the tooth elements; tooth marks which protrude out of the surface and are used for uniformly clamping a test sample are uniformly arranged on opposite surfaces of the oppositely-placed tooth elements; horizontal-state upper bolt holes are formed in vertical surfaces of the upper and lower clamping sleeves; the upper and lower clamping sleeves are fixed by the bolt holes and the bolts to form a whole body; the upper parts of the clamping sleeves of the upper chuck and the lower parts of the clamping sleeves of the lower chuck have horizontal-state through holes; the upper and lower through holes are used for being connected with a force transmission rod by penetrating pins. The tool clamp is convenient to mount and accurate to guide; the slipping between the test sample and the clamp under low temperature can be overcome; the tool clamp is suitable for testing the low-temperature mechanical tensile properties of the standard or non-standard fiber reinforced composite material.