Fracture behaviour of laminated veneer lumber under Mode I and III loading

被引：0

作者：

K. Frühmann

E. K. Tschegg

C. Dai

S. E. Stanzl-Tschegg

机构：

[1] Christian Doppler Laboratory for Fundamentals of Wood Machining at the Institute of Meteorology and Physics,

[2] University of Agricultural Sciences,undefined

[3] Türkenschanzstraße 18,undefined

[4] 1180 Vienna,undefined

[5] Austria e-mail: Klaus.fruchmann@ifp.tuwien.ac.at,undefined

[6] Intitute of Applied and Technical Physics,undefined

[7] Vienna University of Technology,undefined

[8] Wiedner Hauptstraße 8–10,undefined

[9] 1040 Vienna,undefined

[10] Austria,undefined

[11] Forintek Canada Corp,undefined

[12] 2665 East Mall,undefined

[13] Vancouver,undefined

[14] British Columbia,undefined

[15] Canada,undefined

[16] V6T 1W5,undefined

来源：

Wood Science and Technology | 2002年 / 36卷

关键词：

Crack Initiation; Fiber Orientation; State Crack; Laminate Veneer Lumber; Microstructural Damage;

D O I：

暂无

中图分类号：

学科分类号：

摘要：

Mode I and Mode III loading experiments were performed on side grooved CT specimens of two types of Laminated Veneer Lumber (LVL). Steady state crack propagation was maintained in order to detect complete load displacement diagrams. Fracture behaviour and influence of fiber orientation were studied and all important fracture mechanical values (stiffness/compliance, microstructural damage, crack initiation energy, specific fracture energy etc) were determined. Much higher crack initiation energies and specific fracture energies resulted in mode III loading than in mode I loading for both material types. Under external mode III loading, crack initiation occurs in mode III and crack propagation however takes place under mode I owing to crack surface interference. The influence of fiber orientation on fracture mechanical properties of LVL was discussed.

引用

页码：319 / 334

页数：15

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