서지주요정보
2상 이론을 이용한 뇌 충격의 유한 요소 해석 = Finite element analysis of brain impact by linear biphasic theory
서명 / 저자 2상 이론을 이용한 뇌 충격의 유한 요소 해석 = Finite element analysis of brain impact by linear biphasic theory / 박해수.
발행사항 [대전 : 한국과학기술원, 1996].
Online Access 원문보기 원문인쇄

소장정보

등록번호

8006896

소장위치/청구기호

학술문화관(문화관) 보존서고

DME 96037

휴대폰 전송

도서상태

이용가능

대출가능

반납예정일

리뷰정보

초록정보

A finite element analysis employing linear biphasic theory is developed to study the dynamic response of the human head under impact. Intracranial tissues are modeled as a binary mixture, i.e. the fluid and solid phases. The head is modeled as an axisymmetric configuration consisting of skull, CSF(cerebral spinal fluid) in the subarachnoid space, and brain. The loading function is assumed to be distributed uniformly through polar angle and varied as a sine squared function with time. The permeabilities of the subarachnoid space and brain which may reproduce the same coup and contre-coup CSF pressures from the monophasic model are searched in the specified range of skull permeability. Another numerical simulation is conducted to characterize the effect of the volume ratios between two phases in the skull and subarachnoid space. The variation of the volume ratio in the subarachnoid space affects the intracranial pressure distribution of the lateral part while the variation in skull does not. Once the model is established, the finite element analyses of the head in frontal and occipital impact are performed. When the head is directly impacted, a positive(compression) pressure occurs at the impact side while the negative(tension) pressure occurs at the opposite side. The contre-coup pressure in the frontal lobe due to the occipital impact is a little higher than the one in the occipital lobe due to the frontal impact. Since the brain injury are resulting from the rupture of the blood vessesls or neurons, we may estimate the dangerous site of brain injury by the strain of the solid phase in addition to the hydrostatic pressure. At the impact side, the maximum tensile strain occurs beneath the subarachnoid space in radial direction. At the opposite side, the maximum tensile strain along with the large negative pressure drop occurs in the subarachnoid space in anterior-posterior direction. The pressure drop at this opposite side is significant enough that the blood vessels may rupture by the pressure difference. However, the blood vessels at the impact side as well as the neurons and meninges have no such adverse pressure differences and are speculated that they may be destroyed by the axial tension. These results are in good agreement with Nahum's autopsy data showing hemorrhage at the frontal and occipital lobes.

서지기타정보

서지기타정보
청구기호 {DME 96037
형태사항 xiii, 117 p. : 삽도 ; 26 cm
언어 한국어
일반주기 부록 수록
저자명의 영문표기 : Hae-Soo Park
지도교수의 한글표기 : 윤용산
지도교수의 영문표기 : Yong-San Yoon
학위논문 학위논문(박사) - 한국과학기술원 : 기계공학과,
서지주기 참고문헌 : p. 101-106
주제 선형2상이론
투수계수
뇌내부압력
뇌손상
유한요소해석
Linear biphasic theory
Permeability
Intracranial pressure
Brain injury
Finite element analysis
QR CODE qr code