VIRTUAL TESTING / CDS WORKBENCH
ASTM D7264 · Three- & four-point flexure
Measures composite bending stiffness, strength and load-deflection behavior using three-point or four-point loading.
Elastic loading · Play test
Open this exercise in Workbench ↗Open Procedure B · four-point flexure ↗
CDS sign-in and suitable licensed access may be required.
Recorded instructional case · Workbench captures and saved calculation data, October 2026. This website preview does not run the test.
Specimen & fixture
Procedure B · four-point fixture
The total machine force is shared equally between the two loading noses.
Calculated response
Stress (MPa)
Strain (%)
- Procedure A ·3-point
- Procedure B ·4-point
View plotted values
| Series | Strain (%) | Stress (MPa) |
|---|---|---|
| Procedure A ·3-point | 0 | 0 |
| Procedure A ·3-point | 0.003555665331726451 | 1.8461538461538465 |
| Procedure A ·3-point | 0.007111330663452902 | 3.692307692307693 |
| Procedure A ·3-point | 0.010666995995179352 | 5.538461538461539 |
| Procedure A ·3-point | 0.014222661326905804 | 7.384615384615386 |
| Procedure A ·3-point | 0.017778326658632253 | 9.230769230769232 |
| Procedure A ·3-point | 0.021333991990358705 | 11.076923076923078 |
| Procedure A ·3-point | 0.02488965732208516 | 12.923076923076927 |
| Procedure A ·3-point | 0.028445322653811608 | 14.769230769230772 |
| Procedure A ·3-point | 0.032000987985538056 | 16.615384615384617 |
| Procedure A ·3-point | 0.03555665331726451 | 18.461538461538463 |
| Procedure A ·3-point | 0.03911231864899096 | 20.30769230769231 |
| Procedure A ·3-point | 0.04266798398071741 | 22.153846153846157 |
| Procedure A ·3-point | 0.04622364931244386 | 24.000000000000004 |
| Procedure A ·3-point | 0.04977931464417032 | 25.846153846153854 |
| Procedure A ·3-point | 0.053334979975896764 | 27.692307692307697 |
| Procedure A ·3-point | 0.056890645307623215 | 29.538461538461544 |
| Procedure A ·3-point | 0.06044631063934967 | 31.38461538461539 |
| Procedure A ·3-point | 0.06400197597107611 | 33.23076923076923 |
| Procedure A ·3-point | 0.06755764130280256 | 35.07692307692308 |
| Procedure A ·3-point | 0.07111330663452901 | 36.92307692307693 |
| Procedure A ·3-point | 0.07466897196625547 | 38.769230769230774 |
| Procedure A ·3-point | 0.07822463729798192 | 40.61538461538462 |
| Procedure A ·3-point | 0.08178030262970837 | 42.46153846153847 |
| Procedure A ·3-point | 0.08533596796143482 | 44.307692307692314 |
| Procedure A ·3-point | 0.08889163329316127 | 46.15384615384616 |
| Procedure A ·3-point | 0.09244729862488772 | 48.00000000000001 |
| Procedure A ·3-point | 0.09600296395661417 | 49.846153846153854 |
| Procedure A ·3-point | 0.09955862928834064 | 51.69230769230771 |
| Procedure A ·3-point | 0.10311429462006706 | 53.53846153846154 |
| Procedure A ·3-point | 0.10666995995179353 | 55.384615384615394 |
| Procedure A ·3-point | 0.11022562528351998 | 57.23076923076924 |
| Procedure A ·3-point | 0.11378129061524643 | 59.07692307692309 |
| Procedure A ·3-point | 0.11733695594697288 | 60.923076923076934 |
| Procedure A ·3-point | 0.12089262127869933 | 62.76923076923078 |
| Procedure A ·3-point | 0.12444828661042577 | 64.61538461538463 |
| Procedure A ·3-point | 0.12800395194215222 | 66.46153846153847 |
| Procedure A ·3-point | 0.1315596172738787 | 68.30769230769232 |
| Procedure A ·3-point | 0.13511528260560512 | 70.15384615384616 |
| Procedure A ·3-point | 0.1386709479373316 | 72.00000000000001 |
| Procedure A ·3-point | 0.14222661326905803 | 73.84615384615385 |
| Procedure A ·3-point | 0.14578227860078447 | 75.6923076923077 |
| Procedure A ·3-point | 0.14933794393251093 | 77.53846153846155 |
| Procedure A ·3-point | 0.1528936092642374 | 79.3846153846154 |
| Procedure A ·3-point | 0.15644927459596383 | 81.23076923076924 |
| Procedure A ·3-point | 0.1600049399276903 | 83.0769230769231 |
| Procedure A ·3-point | 0.16356060525941674 | 84.92307692307693 |
| Procedure A ·3-point | 0.16711627059114317 | 86.76923076923077 |
| Procedure A ·3-point | 0.17067193592286964 | 88.61538461538463 |
| Procedure A ·3-point | 0.17422760125459608 | 90.46153846153847 |
| Procedure A ·3-point | 0.17778326658632254 | 92.30769230769232 |
| Procedure B ·4-point | 0 | 0 |
| Procedure B ·4-point | 0.0017778326658632255 | 0.9230769230769232 |
| Procedure B ·4-point | 0.003555665331726451 | 1.8461538461538465 |
| Procedure B ·4-point | 0.005333497997589676 | 2.7692307692307696 |
| Procedure B ·4-point | 0.007111330663452902 | 3.692307692307693 |
| Procedure B ·4-point | 0.008889163329316127 | 4.615384615384616 |
| Procedure B ·4-point | 0.010666995995179352 | 5.538461538461539 |
| Procedure B ·4-point | 0.01244482866104258 | 6.4615384615384635 |
| Procedure B ·4-point | 0.014222661326905804 | 7.384615384615386 |
| Procedure B ·4-point | 0.016000493992769028 | 8.307692307692308 |
| Procedure B ·4-point | 0.017778326658632253 | 9.230769230769232 |
| Procedure B ·4-point | 0.01955615932449548 | 10.153846153846155 |
| Procedure B ·4-point | 0.021333991990358705 | 11.076923076923078 |
| Procedure B ·4-point | 0.02311182465622193 | 12.000000000000002 |
| Procedure B ·4-point | 0.02488965732208516 | 12.923076923076927 |
| Procedure B ·4-point | 0.026667489987948382 | 13.846153846153848 |
| Procedure B ·4-point | 0.028445322653811608 | 14.769230769230772 |
| Procedure B ·4-point | 0.030223155319674833 | 15.692307692307695 |
| Procedure B ·4-point | 0.032000987985538056 | 16.615384615384617 |
| Procedure B ·4-point | 0.03377882065140128 | 17.53846153846154 |
| Procedure B ·4-point | 0.03555665331726451 | 18.461538461538463 |
| Procedure B ·4-point | 0.03733448598312773 | 19.384615384615387 |
| Procedure B ·4-point | 0.03911231864899096 | 20.30769230769231 |
| Procedure B ·4-point | 0.040890151314854184 | 21.230769230769234 |
| Procedure B ·4-point | 0.04266798398071741 | 22.153846153846157 |
| Procedure B ·4-point | 0.044445816646580635 | 23.07692307692308 |
| Procedure B ·4-point | 0.04622364931244386 | 24.000000000000004 |
| Procedure B ·4-point | 0.04800148197830709 | 24.923076923076927 |
| Procedure B ·4-point | 0.04977931464417032 | 25.846153846153854 |
| Procedure B ·4-point | 0.05155714731003353 | 26.76923076923077 |
| Procedure B ·4-point | 0.053334979975896764 | 27.692307692307697 |
| Procedure B ·4-point | 0.05511281264175999 | 28.61538461538462 |
| Procedure B ·4-point | 0.056890645307623215 | 29.538461538461544 |
| Procedure B ·4-point | 0.05866847797348644 | 30.461538461538467 |
| Procedure B ·4-point | 0.06044631063934967 | 31.38461538461539 |
| Procedure B ·4-point | 0.062224143305212885 | 32.307692307692314 |
| Procedure B ·4-point | 0.06400197597107611 | 33.23076923076923 |
| Procedure B ·4-point | 0.06577980863693934 | 34.15384615384616 |
| Procedure B ·4-point | 0.06755764130280256 | 35.07692307692308 |
| Procedure B ·4-point | 0.0693354739686658 | 36.00000000000001 |
| Procedure B ·4-point | 0.07111330663452901 | 36.92307692307693 |
| Procedure B ·4-point | 0.07289113930039223 | 37.84615384615385 |
| Procedure B ·4-point | 0.07466897196625547 | 38.769230769230774 |
| Procedure B ·4-point | 0.0764468046321187 | 39.6923076923077 |
| Procedure B ·4-point | 0.07822463729798192 | 40.61538461538462 |
| Procedure B ·4-point | 0.08000246996384515 | 41.53846153846155 |
| Procedure B ·4-point | 0.08178030262970837 | 42.46153846153847 |
| Procedure B ·4-point | 0.08355813529557159 | 43.38461538461539 |
| Procedure B ·4-point | 0.08533596796143482 | 44.307692307692314 |
| Procedure B ·4-point | 0.08711380062729804 | 45.23076923076923 |
| Procedure B ·4-point | 0.08889163329316127 | 46.15384615384616 |
Set up in CDS
- Link the laminate and verify support-span geometry.
- Choose Procedure A or B and define the loading span.
- Enter total force, shared between the noses for B.
- Compare stress–strain and midspan deflection.
Separate three- and four-point loading viewsLinked axial Ex and section inertiaTotal machine force and midspan response
Inputs for this recorded case
- 160 × 13 × 4 mm
- 8 plies / 4 mm
- Selected force 100 N
- Reference force 100 N
These are teaching-case inputs, not ASTM-prescribed specimen dimensions or acceptance criteria.
Response & readout
Force (N)
Midspan deflection (mm)
- Procedure A ·3-point
- Procedure B ·4-point
View plotted values
| Series | Midspan deflection (mm) | Force (N) |
|---|---|---|
| Procedure A ·3-point | 0 | 0 |
| Procedure A ·3-point | 0.024273341997919237 | 2 |
| Procedure A ·3-point | 0.048546683995838474 | 4 |
| Procedure A ·3-point | 0.0728200259937577 | 6 |
| Procedure A ·3-point | 0.09709336799167695 | 8 |
| Procedure A ·3-point | 0.12136670998959619 | 10 |
| Procedure A ·3-point | 0.1456400519875154 | 12 |
| Procedure A ·3-point | 0.16991339398543467 | 14.000000000000002 |
| Procedure A ·3-point | 0.1941867359833539 | 16 |
| Procedure A ·3-point | 0.21846007798127312 | 18 |
| Procedure A ·3-point | 0.24273341997919237 | 20 |
| Procedure A ·3-point | 0.2670067619771116 | 22 |
| Procedure A ·3-point | 0.2912801039750308 | 24 |
| Procedure A ·3-point | 0.3155534459729501 | 26 |
| Procedure A ·3-point | 0.33982678797086935 | 28.000000000000004 |
| Procedure A ·3-point | 0.36410012996878854 | 30 |
| Procedure A ·3-point | 0.3883734719667078 | 32 |
| Procedure A ·3-point | 0.41264681396462705 | 34 |
| Procedure A ·3-point | 0.43692015596254624 | 36 |
| Procedure A ·3-point | 0.4611934979604655 | 38 |
| Procedure A ·3-point | 0.48546683995838474 | 40 |
| Procedure A ·3-point | 0.5097401819563039 | 42 |
| Procedure A ·3-point | 0.5340135239542232 | 44 |
| Procedure A ·3-point | 0.5582868659521424 | 46 |
| Procedure A ·3-point | 0.5825602079500616 | 48 |
| Procedure A ·3-point | 0.6068335499479809 | 50 |
| Procedure A ·3-point | 0.6311068919459002 | 52 |
| Procedure A ·3-point | 0.6553802339438194 | 54 |
| Procedure A ·3-point | 0.6796535759417387 | 56.00000000000001 |
| Procedure A ·3-point | 0.7039269179396578 | 57.99999999999999 |
| Procedure A ·3-point | 0.7282002599375771 | 60 |
| Procedure A ·3-point | 0.7524736019354963 | 62 |
| Procedure A ·3-point | 0.7767469439334156 | 64 |
| Procedure A ·3-point | 0.8010202859313348 | 66 |
| Procedure A ·3-point | 0.8252936279292541 | 68 |
| Procedure A ·3-point | 0.8495669699271732 | 70 |
| Procedure A ·3-point | 0.8738403119250925 | 72 |
| Procedure A ·3-point | 0.8981136539230117 | 74 |
| Procedure A ·3-point | 0.922386995920931 | 76 |
| Procedure A ·3-point | 0.9466603379188502 | 78 |
| Procedure A ·3-point | 0.9709336799167695 | 80 |
| Procedure A ·3-point | 0.9952070219146886 | 82 |
| Procedure A ·3-point | 1.0194803639126078 | 84 |
| Procedure A ·3-point | 1.043753705910527 | 86 |
| Procedure A ·3-point | 1.0680270479084464 | 88 |
| Procedure A ·3-point | 1.0923003899063657 | 90 |
| Procedure A ·3-point | 1.1165737319042848 | 92 |
| Procedure A ·3-point | 1.140847073902204 | 94 |
| Procedure A ·3-point | 1.1651204159001232 | 96 |
| Procedure A ·3-point | 1.1893937578980425 | 98 |
| Procedure A ·3-point | 1.2136670998959618 | 100 |
| Procedure B ·4-point | 0 | 0 |
| Procedure B ·4-point | 0.016687922623569475 | 2 |
| Procedure B ·4-point | 0.03337584524713895 | 4 |
| Procedure B ·4-point | 0.050063767870708424 | 6 |
| Procedure B ·4-point | 0.0667516904942779 | 8 |
| Procedure B ·4-point | 0.08343961311784738 | 10 |
| Procedure B ·4-point | 0.10012753574141685 | 12 |
| Procedure B ·4-point | 0.11681545836498634 | 14.000000000000002 |
| Procedure B ·4-point | 0.1335033809885558 | 16 |
| Procedure B ·4-point | 0.15019130361212527 | 18 |
| Procedure B ·4-point | 0.16687922623569476 | 20 |
| Procedure B ·4-point | 0.18356714885926423 | 22 |
| Procedure B ·4-point | 0.2002550714828337 | 24 |
| Procedure B ·4-point | 0.2169429941064032 | 26 |
| Procedure B ·4-point | 0.2336309167299727 | 28.000000000000004 |
| Procedure B ·4-point | 0.2503188393535421 | 30 |
| Procedure B ·4-point | 0.2670067619771116 | 32 |
| Procedure B ·4-point | 0.2836946846006811 | 34 |
| Procedure B ·4-point | 0.30038260722425053 | 36 |
| Procedure B ·4-point | 0.31707052984782 | 38 |
| Procedure B ·4-point | 0.3337584524713895 | 40 |
| Procedure B ·4-point | 0.35044637509495896 | 42 |
| Procedure B ·4-point | 0.36713429771852846 | 44 |
| Procedure B ·4-point | 0.38382222034209795 | 46 |
| Procedure B ·4-point | 0.4005101429656674 | 48 |
| Procedure B ·4-point | 0.4171980655892369 | 50 |
| Procedure B ·4-point | 0.4338859882128064 | 52 |
| Procedure B ·4-point | 0.4505739108363759 | 54 |
| Procedure B ·4-point | 0.4672618334599454 | 56.00000000000001 |
| Procedure B ·4-point | 0.48394975608351476 | 57.99999999999999 |
| Procedure B ·4-point | 0.5006376787070842 | 60 |
| Procedure B ·4-point | 0.5173256013306538 | 62 |
| Procedure B ·4-point | 0.5340135239542232 | 64 |
| Procedure B ·4-point | 0.5507014465777927 | 66 |
| Procedure B ·4-point | 0.5673893692013622 | 68 |
| Procedure B ·4-point | 0.5840772918249316 | 70 |
| Procedure B ·4-point | 0.6007652144485011 | 72 |
| Procedure B ·4-point | 0.6174531370720706 | 74 |
| Procedure B ·4-point | 0.63414105969564 | 76 |
| Procedure B ·4-point | 0.6508289823192096 | 78 |
| Procedure B ·4-point | 0.667516904942779 | 80 |
| Procedure B ·4-point | 0.6842048275663485 | 82 |
| Procedure B ·4-point | 0.7008927501899179 | 84 |
| Procedure B ·4-point | 0.7175806728134875 | 86 |
| Procedure B ·4-point | 0.7342685954370569 | 88 |
| Procedure B ·4-point | 0.7509565180606265 | 90 |
| Procedure B ·4-point | 0.7676444406841959 | 92 |
| Procedure B ·4-point | 0.7843323633077653 | 94 |
| Procedure B ·4-point | 0.8010202859313348 | 96 |
| Procedure B ·4-point | 0.8177082085549043 | 98 |
| Procedure B ·4-point | 0.8343961311784738 | 100 |
- A midspan deflection
- 1.214 mm
- B midspan deflection
- 0.8344 mm
- Total load in each case
- 100 N
Elastic beam response. Contact indentation and transverse shear deflection are excluded.
About this ASTM reference
Standard Test Method for Flexural Properties of Polymer Matrix Composite Materials
Active catalog edition checked October 10, 2026. The official standard defines the physical method; the CDS example below has a narrower modeling scope. Full procedures remain on ASTM’s site.
Find this setup in Workbench
Opens the connected guided study. Select the matching ASTM setup in the Test menu to inspect its fixture.
What this CDS case represents
Read the actual ASTM standard ↗Elastic beam response. Contact indentation and transverse shear deflection are excluded.
Load & Play test behavior
Playback follows an elastic beam load ramp. It has no calculated damage events. For D2344, only nominal short-beam stress is appropriate screening output; the beam display is not a strength or contact solution.
In Workbench, select the mechanical case and inspect Live Load. Play test opens the eligible Response → Failure calculation. Availability depends on compatible equipment, selected settings and licensed modules. Gauge/specimen displacement excludes frame compliance and grip slip. Playback speed changes viewing speed, not the test’s physical loading rate.
Instructional model comparison, not experimental validation or ASTM certification. Physical testing requires the licensed standard and a qualified test program.