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根据断裂力学理论,提出断裂功作为树脂砂断裂的新判据;介绍了测定树脂砂断裂功的方法;对酚尿烷树脂自硬砂和酚醛树脂覆膜砂的断裂功进行了测定,并在生产现场作了验证.
According to the theory of fracture mechanics, the fracture criterion is proposed as a new criterion for the fracture of resin sand. The method of measuring the fracture energy of resin sand is introduced. The fracture work of phenolic urethane resin sand and phenolic resin coated sand is determined. Production site made a validation.