인체재료 모사 기반 충격 타박상 응력 예측 및 위협인자의 영향도 분석
The stress prediction of the bruise induced by impact based on human material mimesis and the influence analysis of threat factors
In various violent crime cases, blunt instruments accounts for approximately 50 % among direct hit criminal tools, causing injury, especially bruising, in the event of a physical impact. In this study, the prediction of bruising stress and the influence of the blunt instrument in terms of diameter and aspect ratio of bruise was analyzed based on the human material mimesis. Two material behavior models (quasi-linear viscoelastic model and Ogden model) were verified for human material mimesis. A finite element analysis in relation to the impact was performed according to diverse threat factors, and the influence of threat factors on the bruise were elucidated via an analysis of variance. As a result, the difference between the results of the finite element analysis and those of experiments reported in references was an average 11.7 %. Therefore, it was confirmed that the quasi-linear viscoelastic model and the Ogden model described the behavior of human material adequately. By comparing the bruise diameters obtained from the finite element analysis with the those in references, it was found that the bruise occurred when 23~30 MPa of von Mises stress was applied to the epidermis and dermis. In addition, the velocity of the blunt instrument was the most dominant influencing factor to the diameter of the bruise whereas the shape of the blunt instrument had the greatest effect on the aspect ratio of the bruise. It is believed that the range of the bruising stresses presented in this study may help predict and identify bruise in body, and an analysis methodology between the threat factors and the bruises based on the statistical technique can be utilized as a generic technique of forensic investigation.
목차
Abstract I. 서론 II. 재료거동 모델 및 통계분석 2.1 준 선형 점탄성 모델 2.2 Ogden 모델 2.3 분산분 석법 III. 유한요소해석 3.1 피부구조 모델링 3.2 충격해석 IV. 결과 및 고찰 4.1 재료거동모델 검증 4.2 타박상 범위 및 발생응력 예측 4.3 위협인자 영향도 분석 V. 결론 VI. 사사 VII. 참고문헌
법과학 분야는 사회정의 구현에 있어 크나큰 가치가 있음에도 불구하고 우리나라에서는 이 분야에 대한 인식이 미흡하여 선진 외국에 비해 침체되어 있는 실정이다. 이에 우리나라에서도 법과학 분야와 관련 있는 학계, 연구기관, 수사기관 등 유관 단체들로 구성된 한국 법과학회를 창립하여 이 분야를 활성화 시켜 과학수사를 한층 더 발전시키기 위함을 목적으로 한다.