An elastic-viscoplastic model for excised facial tissues

被引:31
作者
Rubin, MB [1 ]
Bodner, SR
Binur, NS
机构
[1] Technion Israel Inst Technol, Fac Mech Engn, IL-32000 Haifa, Israel
[2] Park Place Med Ctr, Port Arthur, TX 77642 USA
来源
JOURNAL OF BIOMECHANICAL ENGINEERING-TRANSACTIONS OF THE ASME | 1998年 / 120卷 / 05期
关键词
D O I
10.1115/1.2834762
中图分类号
Q6 [生物物理学];
学科分类号
071011 ;
摘要
Unified constitutive equations for elastic-viscoplastic materials were modified and used to model the highly nonlinear elastic and rate-dependent inelastic response exhibited in recent experiments on excised facial tissues. These included the skin and the underlying supportive tissue SMAS (the Superficial Musculoaponeurotic System). This study indicates a number of relevant results: The skin is more strain rate dependent than the SMAS; the nonlinearity of the elasticity of the skin is greater than that of the SMAS; both tissues exhibit a hardening effect indicated by increased resistance to inelastic deformation due to stress acting over a time period; the hardening effect leads to a decrease in time dependence and an increased elastic range, which is more pronounced for SMAS. Consequently the SMAS can be viewed as the firmer elastic foundation of the more viscous skin. Moreover, the relaxation time for the skin is fairly short so the skin would be expected to conform to the deformation of the SMAS if it remained attached to the SMAS during stretching. This is relevant when it is undesirable to separate the skin from the SMAS for physiological reasons.
引用
收藏
页码:686 / 689
页数:4
相关论文
共 9 条
[1]   CONSTITUTIVE EQUATIONS FOR ELASTIC-VISCOPLASTIC STRAIN-HARDENING MATERIALS [J].
BODNER, SR ;
PARTOM, Y .
JOURNAL OF APPLIED MECHANICS-TRANSACTIONS OF THE ASME, 1975, 42 (02) :385-389
[2]  
BODNER SR, 1987, UNIFIED CONSTITUTIVE, P273
[3]  
Fung YC, 1993, MECH PROPERTIES LIVI, P242
[4]   Mechanical properties and microstructure of the superficial musculoaponeurotic system [J].
HarShai, Y ;
Bodner, SR ;
EgozyGolan, D ;
Lindenbaum, ES ;
BenIzhak, O ;
Mitz, V ;
Hirshowitz, B .
PLASTIC AND RECONSTRUCTIVE SURGERY, 1996, 98 (01) :59-70
[5]   Viscoelastic properties of the superficial musculoaponeurotic system (SMAS): A microscopic and mechanical study [J].
HarShai, Y ;
Bodner, SR ;
EgozyGolan, D ;
Lindenbaum, ES ;
BenIzhak, O ;
Mitz, V ;
Hirshowitz, B .
AESTHETIC PLASTIC SURGERY, 1997, 21 (04) :219-224
[6]   SUPERFICIAL MUSCULO-APONEUROTIC SYSTEM (SMAS) IN PAROTID AND CHEEK AREA [J].
MITZ, V ;
PEYRONIE, M .
PLASTIC AND RECONSTRUCTIVE SURGERY, 1976, 58 (01) :80-88
[8]   AN INCREMENTAL ELASTIC-VISCOPLASTIC THEORY INDICATING A REDUCED MODULUS FOR NONPROPORTIONAL BUCKLING [J].
RUBIN, MB ;
BODNER, SR .
INTERNATIONAL JOURNAL OF SOLIDS AND STRUCTURES, 1995, 32 (20) :2967-2987
[9]  
Skoog T, 1974, PLASTIC SURG NEW MET