Znn3bq.jpeg
±±¾©Ê¯ÓÍ»¯¹¤Ñ§Ôº2026ÄêÑо¿ÉúÕÐÉú½ÓÊÕµ÷¼Á¹«¸æ
²é¿´: 1886  |  »Ø¸´: 6

beyond1987

Ìú³æ (³õÈëÎÄ̳)

[ÇóÖú] ľ²ÄµÄÓ¦Á¦Ó¦±ä¹ØÏµÊÇÔõÑùµÄѽ£¿ ÒÑÓÐ1È˲ÎÓë

´ó¼ÒÓÐÖªµÀµÄô£¿
ÎÒÕÒÁ˸÷ÖÖÊé¼®ºÍÎÄÏ×£¬¶¼Ã»Óп´µ½Óн²Ä¾²Ä±¾¹¹¹ØÏµµÄ¡£ÓÐûÓÐÈËÓÐÕâ·½ÃæµÄ×ÊÁÏ»òÎÄÏ×ʲôµÄô£¿Óеϰ·¢¸øÎÒÒ»·Ý°É£¬¸Ð¼¤²»¾¡~
»Ø¸´´ËÂ¥

» ²ÂÄãϲ»¶

» ±¾Ö÷ÌâÏà¹Ø¼ÛÖµÌùÍÆ¼ö£¬¶ÔÄúͬÑùÓаïÖú:

ºÇºÇ~
ÒÑÔÄ   »Ø¸´´ËÂ¥   ¹Ø×¢TA ¸øTA·¢ÏûÏ¢ ËÍTAºì»¨ TAµÄ»ØÌû

Ò»ÌõСÊ鳿

Ìú¸Ëľ³æ (ÖªÃû×÷¼Ò)

¡¾´ð°¸¡¿Ó¦Öú»ØÌû

¸Ðл²ÎÓ룬ӦÖúÖ¸Êý +1
????????????????????????????????????????????????????????????????????????????
????????????????????????????????§à???
2Â¥2013-02-06 09:24:16
ÒÑÔÄ   »Ø¸´´ËÂ¥   ¹Ø×¢TA ¸øTA·¢ÏûÏ¢ ËÍTAºì»¨ TAµÄ»ØÌû

ehe333333

ľ³æ (ÖøÃûдÊÖ)

ÕÒµ½Ò»¸ö±ðÈ˵ÄʵÑé¡£×Ô¼º¿´¿´°É¡£


Materials testing laboratories determine wood strength and stiffness in a standard static-bending test where the test specimen's resistance to slowly applied loads is measured. The standard tests are generally conducted at 12% moisture content and 20¡ã C temperature. The ends of the test specimen are supported on rollers, usually with growth rings horizontal, and a load is applied at the beam centre so that a constant rate of deflection is maintained until the piece fractures. Instruments measure and plots the load (stress) and the deflection (strain) at intervals, as shown in the diagram. The vertical axis reflects the increasing stress and the horizontal axis the increasing strain.

The first part of the curve is a straight line where the deflection is directly proportional to the load and where, once the load is removed, the beam will return to its original state; i.e. it retains its elasticity. With increasing load, a limit point of proportionality is reached after which the increase in amount of deflection is greater than (i.e. no longer proportional with) the increase in load; but elasticity is still retained until an elastic limit is reached. If stress is further increased, the material loses elasticity and becomes plastic (i.e when the load is removed the deformation caused by deflection will be more or less permanent). At the point of maximum load, ultimate load or ultimate strength, the material begins to yield and will fracture unless load is substantially reduced.

stress_strain.gif

3Â¥2013-02-08 17:20:17
ÒÑÔÄ   »Ø¸´´ËÂ¥   ¹Ø×¢TA ¸øTA·¢ÏûÏ¢ ËÍTAºì»¨ TAµÄ»ØÌû

ÊÖÖеÄɳ

½ð³æ (СÓÐÃûÆø)

¡¾´ð°¸¡¿Ó¦Öú»ØÌû

¡¶Ä¾ÖÊ×ÊÔ´²ÄÁÏѧ¡· »òÕ߸÷ÖÖ°æ±¾µÄ¡¶Ä¾²Äѧ¡·¶¼»áÓнÏΪÏêϸµÄ½éÉܵġ­¶øÇÒÕâÀàÎÄÏײ»ÊÇÒ»ËÑÒ»´ó°ÑÂð¡­

[ ·¢×ÔÊÖ»ú°æ http://muchong.com/3g ]
4Â¥2013-02-16 11:56:12
ÒÑÔÄ   »Ø¸´´ËÂ¥   ¹Ø×¢TA ¸øTA·¢ÏûÏ¢ ËÍTAºì»¨ TAµÄ»ØÌû

ÄäÃû

Óû§×¢Ïú (СÓÐÃûÆø)

±¾Ìû½öÂ¥Ö÷¿É¼û
5Â¥2013-03-07 09:43:40
ÒÑÔÄ   ÉêÇëÅ©ÁÖEPI   »Ø¸´´ËÂ¥   ±à¼­   ²é¿´ÎÒµÄÖ÷Ò³

yuekong

ÖÁ×ðľ³æ (ÎÄ̳¾«Ó¢)

¡¾´ð°¸¡¿Ó¦Öú»ØÌû

¸úº¬Ë®ÂÊÓйØÏµ£¬×ܵÄÀ´Ëµ£¬Í䡢ѹ£¬Êǵ¯ËÜÐÔ£»À­ÊÇÏßµ¯ÐÔ

[ ·¢×ÔÊÖ»ú°æ http://muchong.com/3g ]
6Â¥2013-08-03 19:41:54
ÒÑÔÄ   »Ø¸´´ËÂ¥   ¹Ø×¢TA ¸øTA·¢ÏûÏ¢ ËÍTAºì»¨ TAµÄ»ØÌû

zyx1989

гæ (³õÈëÎÄ̳)

¡¾´ð°¸¡¿Ó¦Öú»ØÌû

ÇëÎÊÂ¥Ö÷»¹ÓÐÏà¹Ø×ÊÁÏô£¿Çó´«Ò»·Ý°¡£¡QQÓÊÏ䣺1318270243@qq.com¡£ÁíÍ⣬ehe333333´ðÖ÷·¢µÄÄÇÆªÎÄÕÂÊÇʲôÎÄÕ£¿ÓÐÖªµÀµÄô£¿
7Â¥2021-01-27 19:16:58
ÒÑÔÄ   »Ø¸´´ËÂ¥   ¹Ø×¢TA ¸øTA·¢ÏûÏ¢ ËÍTAºì»¨ TAµÄ»ØÌû
Ïà¹Ø°æ¿éÌø×ª ÎÒÒª¶©ÔÄÂ¥Ö÷ beyond1987 µÄÖ÷Ìâ¸üÐÂ
×î¾ßÈËÆøÈÈÌûÍÆ¼ö [²é¿´È«²¿] ×÷Õß »Ø/¿´ ×îºó·¢±í
[¿¼ÑÐ] 284Çóµ÷¼Á +12 èó@@ 2026-04-06 12/600 2026-04-07 16:21 by ¿É¿Ú¿ÉÀÖ²»¼Ó±ùØ
[¿¼ÑÐ] 285Çóµ÷¼Á +16 ŶßϺôo 2026-04-04 16/800 2026-04-07 12:31 by 1018329917
[¿¼ÑÐ] 327Çóµ÷¼Á +5 Xxjc1107. 2026-04-06 5/250 2026-04-06 21:43 by dongzh2009
[¿¼ÑÐ] Ò»Ö¾Ô¸ÄϺ½£¬ÊýһӢһѧ˶317Çóµ÷¼Á£¡£¡ +6 Acaciad 2026-04-04 6/300 2026-04-06 12:13 by ¿¼ÑÐѧУÕеãÈË
[¿¼ÑÐ] ²ÄÁÏר˶(0856) 339·ÖÇóµ÷¼Á +10 ¹þ¹þ¹þ¶ì¹þ¹þ¹þ 2026-04-04 10/500 2026-04-05 18:51 by À¶ÔÆË¼Óê
[¿¼ÑÐ] 080200ѧ˶£¬277·Ö£¬ÊýÒ»104£¬Çó´ø×ߣ¡ +7 Æ¿×ÓPZ 2026-03-31 7/350 2026-04-05 17:49 by liucky
[¿¼ÑÐ] Ò»Ö¾Ô¸±±¾©»¯¹¤´óѧ£¬³õÊԳɼ¨350Çóµ÷¼Á +9 ÑØ°¶?±´¿Ç 2026-04-04 14/700 2026-04-05 01:09 by ÑØ°¶?±´¿Ç
[¿¼ÑÐ] ר˶310Çóµ÷¼Á +5 ÀÌÀÌÎÒ¡­. 2026-04-04 6/300 2026-04-04 23:33 by barlinike
[¿¼ÑÐ] ²ÄÁϵ÷¼Á +10 ÀÁÑòÑòÇáÖÃÓñÍÎ 2026-04-02 11/550 2026-04-04 21:56 by laoshidan
[¿¼ÑÐ] 085600µ÷¼Á +4 1amJJ 2026-04-02 4/200 2026-04-04 21:53 by hemengdong
[¿¼ÑÐ] 319Çóµ÷¼Á +4 ÐÇÐDz»Õ£ÑÛà¶ 2026-04-03 4/200 2026-04-04 16:25 by ÖзÉÔº¿Õ¹ÜѧԺÑ
[¿¼ÑÐ] 309Çóµ÷¼Á +6 ÁõÁõÁõ1231 2026-04-02 7/350 2026-04-04 13:41 by liucky
[¿¼ÑÐ] 372·Ö²ÄÁÏÓ뻯¹¤£¨085600£©Ò»Ö¾Ô¸ºþÄÏ´óѧÇóµ÷¼Á +3 À¶¼ãƬ 2026-04-03 4/200 2026-04-03 17:58 by Jimmyandyou
[¿¼ÑÐ] ¿¼Ñе÷¼Á +3 Draa 2026-04-03 3/150 2026-04-03 17:37 by hgwz7468
[¿¼ÑÐ] Ò»Ö¾Ô¸±±¾©½»Í¨´óѧ²ÄÁϹ¤³Ì×Ü·Ö358 +4 cs0106 2026-04-03 4/200 2026-04-03 13:41 by °ÙÁéͯ888
[¿¼ÑÐ] ÊýÒ»Ó¢Ò»285Çóµ÷¼Á +7 AZMK 2026-04-03 9/450 2026-04-03 13:03 by ms629
[¿¼ÑÐ] 081200-11408-276ѧ˶Çóµ÷¼Á +6 ´Þwj 2026-04-02 6/300 2026-04-03 10:19 by À¶ÔÆË¼Óê
[¿¼ÑÐ] 312 »¯¹¤»òÖÆÒ©µ÷¼Á +8 ССī123 2026-04-02 9/450 2026-04-03 09:12 by zhouxiaoyu
[¿¼ÑÐ] 298ÇóBÇøµ÷¼Á +4 zzz£¬£¬r 2026-04-02 5/250 2026-04-02 12:17 by ÍÁľ˶ʿÕÐÉú
[¿¼ÑÐ] 310·ÖÇóµ÷¼Á +4 ³É¹¦Éϰ¶wang 2026-04-01 4/200 2026-04-01 20:35 by liu823948201
ÐÅÏ¢Ìáʾ
ÇëÌî´¦ÀíÒâ¼û