Abstract:
본 발명은 연속압입법을 이용한 파괴인성 측정방법에 관한 것으로서, 상기 연속압입법으로 재료의 응력계수, 가공경화지수, 항복응력을 측정하여 상기 재료의 환산탄성계수(E r )를 계산하고, 유효탄성계수와 초기탄성계수를 구한 후, 공공분율을 이용하여 손상변수를 계산한다. 손상변수를 이용하여 임계탄성계수와 임계압입깊이를 구하고, 마지막으로 재료의 파괴인성값을 구한다. 본 발명에 따르면 연성재료에 대하여 비파괴적인 방법으로 파괴인성을 정확하게 측정할 수 있는 효과가 있다.
Abstract:
PURPOSE: An indentation testing apparatus, data measurement method, mechanical properties measurement method and record medium is provided to allow the indentation testing machine to be easily attached to a structure by minimizing volume of the indentation testing machine, while shortening testing time. CONSTITUTION: An indentation testing machine comprises a load generating unit(110) having a motor(111) for generating load to be applied to a material, and a decelerator(112); a load transmission unit for converting the rotating force generated from the load generating unit into a vertical load; a load sensor(123) mounted to the load transmission unit, and which continuously measures changes of load; a connection shaft and an indenter holder(125) connected to an end of the load transmission unit, and which move along the axis same with the load sensor; an indenter(127) exposed from an end of the indenter holder, and which substantially applies a contact load to the material; and a displacement sensor for continuously measuring changes of indentation depth.
Abstract:
PURPOSE: An indentation testing apparatus, data measurement method, mechanical properties measurement method and record medium is provided to allow the indentation testing machine to be easily attached to a structure by minimizing volume of the indentation testing machine, while shortening testing time. CONSTITUTION: An indentation testing machine comprises a load generating unit(110) having a motor(111) for generating load to be applied to a material, and a decelerator(112); a load transmission unit for converting the rotating force generated from the load generating unit into a vertical load; a load sensor(123) mounted to the load transmission unit, and which continuously measures changes of load; a connection shaft and an indenter holder(125) connected to an end of the load transmission unit, and which move along the axis same with the load sensor; an indenter(127) exposed from an end of the indenter holder, and which substantially applies a contact load to the material; and a displacement sensor for continuously measuring changes of indentation depth.